To run my application OpenGL version 2.0 *or higher* is required. glxinfo | grep OpenGL yields: Xlib: extension "NV-GLX" missing on display ":1007.0". OpenGL vendor string: Mesa project: www.mesa3d.org OpenGL renderer string: Mesa GLX Indirect OpenGL version string: 1.2 (1.5 Mesa 6.4.1) OpenGL extensions: /sbin/lspci -v yields: 01:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 310] (rev a2) (prog-if 00 [VGA controller]) Subsystem: Device 1b0a:9060 Flags: bus master, fast devsel, latency 0, IRQ 169 Memory at fa000000 (32-bit, non-prefetchable) [size=16M] Memory at d0000000 (64-bit, prefetchable) [size=256M] Memory at ce000000 (64-bit, prefetchable) [size=32M] I/O ports at ec00 [size=128] Expansion ROM at fbe80000 [disabled] [size=512K] Capabilities: Power Management version 3 Capabilities: MSI: Enable- Count=1/1 Maskable- 64bit+ Capabilities: Express Endpoint, MSI 00 Capabilities: [b4] Vendor Specific Information: Len=14 Kernel modules: nvidiafb, nvidia-169_07, nvidia What I've tried: Installing NVIDIA-Linux-x86-310.32.run driver (It supports my graphics card). Any pointers how to upgrade to OpenGL 2.0? System: CentOS 5.8 32 bit
uname -a: Linux xxxxxxx 2.6.18-348.1.1.el5 #1 SMP Tue Jan 22 16:24:03 EST 2013 i686 i686 i386 GNU/Linux

Have a server running centos 7.6, and it has 4 ssd's as Raid-0 mounted as /scratch/ I have the linux program stress-1.0.4-16 and I just learned stress-ng existed. Is there a way with stress to tell it to do I/O operations to stress a specific set of disks such as my 4 disk Raid-0? Or does it only work on whatever the root file system is such as /tmp? And if that's the case I've done systemctl enable tmp.mount which means the /tmp folder is no longer on disk negating the disk i/o function of stress ?

I have a dual boot system with CentOS 7 and Win10. My install was totally vanilla (CentOS then Win10) and went fine. Everything is great except that grub does not appear to save my "last" choice from the boot load menu. I dug through all the grub configuration files (e.g. /boot/efi/EFI/centos/grub.cfg) and all the code seems there for recording the last choice. My /etc/default/grub shows: GRUB_TIMEOUT=5 ... GRUB_DEFAULT=saved ... GRUB_SAVEDEFAULT=true Is there anything obvious I am missing or need to do to enable this? My /etc/efi/EFI/centos/grubenv never apperas to record the latest selection. It always has: saved_entry=CentOS Linux (3.10.0-327.el7.x86_64) 7 (Core) ##########[...snip...padding to 1k] I can't see this file from a Windows boot, but I did test via the "rescue Centos entry". I manually set the value in grubenv to Windows Boot Manager (on /dev/sda2) (the Windows entry) and this works out okay. However, booting back into CentOS fails to change it. It just seems I am missing something to enable this "save the last choice" behavior. Any ideas?

I am building a custom ISO for CentOS 7 and for now I am just intending for this to be an absolute minimal install (a proof of concept basically). I am re-creating the ISO via using mkisofs. The command I entered is: Mkisofs –o custom.iso –b isolinux.bin –c boot.cat –no-emul-boot –V ‘CentOS’ –boot-load-size 4 –boot-info-table –R –J –v –T isolinux/ This successfully created the iso and allowed me to mount it in the optical drive of VirtualBox. Upon installation I am receiving an error within the rdsosreport.txt that says: > localhost dracut-initqueue: Warning: Could not boot. > > localhost dracut-initqueue: Warning: /dev/root does not exist So far I have: copied .treeinfo, .discinfo into the root directory of where I am making the iso. Created subdirectory /isolinux with all the /isolinux data from the latest CentOS-7-x86_64-Minimal-1503-01 as well as the /images and /LiveOS directories. I have also copied over the repo .xml file into the root directory. I have tried a multitude of kickstart files, but the current version I am using is ultra-minimalistic just to get this to work at some point. install cdrom text keyboard us lang en_US.UTF-8 rootpw --iscrypted $6$XRIetvtFyLXRFVzZ$jX7xRxsN6M.DIqwJ9DQui9ytaqK3IAzauSqB4zeRNvMKJo6xCJQAk90XIaxh.SBn0IBtyZM7ZlHK8eSk55VnG0 timezone America/New_York --isUtc clearpart --none --initlabel %packages @core %end My ks.cfg is located in isolinux/ks/ks.cfg and when I boot into the system I am running is linux inst.ks=cdrom:/dev/cdrom:/ks/ks.cfg I'm a little lost on where to investigate further as all I am trying to do is load a very simple kickstart file to get Linux to do a one-button install. I don't necessarily need to be told, just to be pointed in the right direction as I've tried quite a few different kickstart configurations and have come up with the same error. edit: I have gotten this working by editing the isolinux.cfg file and changing the volume ID to my -V volume ID set in my mkisofs and then selecting this menu option when doing my installation. append initrd=initrd.img inst.stage2=hd:LABEL=CentOS quiet inst.ks=cdrom:/dev/cdrom:/ks/ks.cfg I have other errors within the iso that I'm investigating now due to the fact my kickstart file is so barren.

I have a virtual machine with CentOS 7 at school, but I need to work from home. So, I followed a tutorial to install Gnome and another to create a VNC server, all this to install TeamViewer. Then, I install TeamViewer 11, but when I open it, it says the famous message: Not ready, Please check your connection I tried to input proxy settings, but it didn't save the changes, so I had to edit the global.conf file. I know that the proxy is well in the system because I can navigate; I can even ping 178.77.120.1, and it works. But the problem still remains. Then, searching the web, I saw I could change the SELinux config to permissive. I do that in another virtual machine, and that works, but it doesn't work on my machine. It has a Wine problem. I try to fix it using the following: # setsebool -P mmap_low_allowed 1 but that doesn't work. Another solution was to add to mdns4 to host in /etc/nsswitch.conf, but it doesn't work. So I decide to uninstall, using: rpm -qa | grep teamviewer rpm -e But when I installed TeamViewer again, it loaded the proxy settings, so I think it didn't completely remove them. Here's today's log Start: 2016/09/08 08:37:06.584 (UTC-5:00) Version: 11.0.57095 ID: 0 Loglevel: LogAll (0) License: 0 Server: master14.teamviewer.com IC: 0 CPU: x86 Family 6 Model 45 Stepping 7, GenuineIntel CPU extensions: p8 OS: Lx CentOS 7 (Core) (32-bit) IP: xx.xx.xxx.xxx Proxy-Settings: Type=0 IP= User= AppPath: C:\TeamViewer\TeamViewer.exe UserAccount: root 2016/09/08 08:37:06.588 8 29 GX2 AutoLogin::Login: enabled: 0 2016/09/08 08:37:06.803 8 29 GX2 CMain::LoadResourceDLLs(): No custom resource dll found 2016/09/08 08:37:06.805 8 29 GX2 Win32_GUI::FontReallyExists: 'Segoe UI' found 0 matches. 2016/09/08 08:37:06.805 8 29 GX2 Win32_GUI::FontReallyExists: 'Liberation Sans' found 4 matches. 2016/09/08 08:37:06.814 8 29 GX2 InterProcessBase::StartTcpCommunicationInternal(): setting m_NetworkConnector to new TCP connector 2016/09/08 08:37:06.814 8 29 GX2 Opening local TCP connection to 127.0.0.1:5942 2016/09/08 08:37:06.815 8 29 GX2 Local TCP connection established 2016/09/08 08:37:06.815 8 29 GX2 Process ID: L 32511 / W 8 2016/09/08 08:37:06.902 8 29 GX2 SettingsIPCReception receive a SYNCHRONISE Settings command : UserSettings 2016/09/08 08:37:06.904 8 29 GX2 Received Control_InitIPC_Response processtype=1 2016/09/08 08:37:06.904 8 29 GX2 Received Control_InitIPC_Response runningProcesses=3 2016/09/08 08:37:06.904 8 29 GX2 Control_InitIPC_Response: all processes 3 completely initialized 2016/09/08 08:37:06.940 8 29 GX2!! ProxySearch.GetProxiesFromPAC: WinHttpGetProxyForUrl(WPAD) failed for URL 'http://www.teamviewer.com/ ' with error 12166, Errorcode=12166 2016/09/08 08:37:06.944 8 29 GX2!! ProxySearch.GetProxiesFromPAC: WinHttpGetProxyForUrl(WPAD) failed for URL 'https://www.teamviewer.com:443/ ' with error 12166, Errorcode=12166 2016/09/08 08:37:06.944 8 29 GX2 ProxySearch: found WinHTTP proxy: http//10.20.4.15:3128 2016/09/08 08:37:06.946 32646 4091542336 QX2 SessionBusWatcher: suitable bus found with address "unix:abstract=/tmp/dbus-LumdutjnU5,guid=8c230a14389528c505b45eeb57d008e6" 2016/09/08 08:37:07.070 8 9 GX2!! GetSimpleDisplayCertNameFromFile: File 'C:\TeamViewer\tv_w32.dll' does not exist., Errorcode=2 2016/09/08 08:37:07.070 8 9 GX2!! VerifyTeamViewerSignature() : WinVerifyTrust failed, result=2, Errorcode=2 2016/09/08 08:37:07.070 8 9 GX2!! MachineHooks: Library not found, Errorcode=2 2016/09/08 08:37:07.074 8 9 GX2 MachineID m=0 - 1 2016/09/08 08:37:07.077 8 9 GX2 TVUpdate::Init() Version-URL: download.teamviewer.com/download/update/ Update-URL: download.teamviewer.com/download/update/ 2016/09/08 08:37:07.077 8 9 GX2 TVUpdate::Init() Preview Channel Number : 1 2016/09/08 08:37:07.165 8 9 GX2!! TVW Wine: SetWindowManagerClassHint: No such window, Errorcode=120 2016/09/08 08:37:07.195 8 9 GX2!! TVW Wine: SetWindowManagerClassHint: No such window 2016/09/08 08:37:07.199 8 9 GX2!! TVW Wine: SetWindowManagerClassHint: No such window 2016/09/08 08:37:07.218 8 9 GX2 ManagerHolderStateMachine: Switching from None to NotReady 2016/09/08 08:37:07.219 8 21 GX2 ChatManager::ChatManager: created 2016/09/08 08:37:07.219 8 21 GX2 ChatManager::Factory: ChatManager created 2016/09/08 08:37:07.219 8 21 GX2 IncomingBetterChatCommandHandler::IncomingBetterChatCommandHandler: created 2016/09/08 08:37:07.219 8 21 GX2 IncomingChatCommandRegistration::Start: registering for ready state properties 2016/09/08 08:37:07.220 8 9 GX2!! DragDropRegistration: could not register window, HR=80040155 2016/09/08 08:37:07.222 8 9 GX2!! BuddyWindow.LoadWindowPosUnscaled: bad lexical cast 2016/09/08 08:37:07.227 8 9 GX2 AccountLoginGUI::CreateLoginKey(): [OnlineState] System is set to Visible. 2016/09/08 08:37:07.234 8 9 GX2!! TVW Wine: SetWindowManagerClassHint: No such window, Errorcode=120 2016/09/08 08:37:07.272 8 9 GX2 CMainWindow::ShouldShowDynamicPassword(): dynPw=1 allowIncoming=1 id=0 ka=0 lanAllowed=0 lanOnly=0 networkState=1 showDynPwd=0 2016/09/08 08:37:07.278 8 9 GX2!! ServerControl: RegisterPowerSettingNotification failed with error 0 2016/09/08 08:37:07.323 32645 139768218244864 gX2 PulseAudio: Connected to server 'unix:/run/user/0/pulse/native' (protocol version 30, library version 6.0.0 2016/09/08 08:37:07.324 32645 139768311990016 gX2 PulseAudio: Connection established 2016/09/08 08:37:07.456 8 33 GX2!! WineMixer: Unable to initialise mixer -1 -1 2016/09/08 08:37:07.456 32645 139768218244864 gX2 PulseAudio: Exit main loop (0), err=-2 2016/09/08 08:37:36.780 8 9 GX2 CMainWindow::InitCloseTV(): Prepare to close TeamViewer 2016/09/08 08:37:36.780 8 9 GX2!! ServerControl: UnregisterPowerSettingNotification failed with error 0 2016/09/08 08:37:36.781 8 9 GX2!! TVW Wine: SetWindowManagerClassHint: No such window 2016/09/08 08:37:36.785 8 9 GX2 Chat::Stop: Stopping chat 2016/09/08 08:37:36.785 8 9 GX2 Chat::Stop: Cancelling of Start 2016/09/08 08:37:36.786 8 9 GX2 ChatManager::UnregisterIncomingCommandRegistration: destroying incomingCommandRegistration 2016/09/08 08:37:36.786 8 9 GX2 IncomingChatCommandRegistration::Stop: disconnecting ready state properties 2016/09/08 08:37:36.787 8 9 GX2 ChatManager::Close 2016/09/08 08:37:36.787 8 9 GX2 ChatManager::UnregisterIncomingCommandRegistration: destroying incomingCommandRegistration 2016/09/08 08:37:36.787 8 9 GX2 ChatManager::ClearAccountChat: clearPersistently = 0 2016/09/08 08:37:36.788 8 9 GX2 ChatManager::ClearNonAccountChat 2016/09/08 08:37:36.789 8 9 GX2 ChatManager::~ChatManager: destroyed 2016/09/08 08:37:36.789 8 9 GX2 IncomingBetterChatCommandHandler::IncomingBetterChatCommandHandler: destroyed 2016/09/08 08:37:36.789 8 9 GX2!! MainWindow.OnDestroy: WTSUnRegisterSessionNotification failed with error 0 2016/09/08 08:37:36.792 8 9 GX2 CMainWindow::OnDestroy(): Closing TeamViewer 2016/09/08 08:37:36.907 32645 139768235030272 gX2 XClipboard: Shutting down event loop 2016/09/08 08:37:36.955 32645 139768525608768 gX2 TVGuiSlave.64: Terminated 2016/09/08 08:37:37.008 8 9 GX2!! ConfigurationHub::HandleRegistrationResponse(): registering for feature 1 failed with error 2 2016/09/08 08:37:37.008 8 9 GX2!! ConfigurationHub::HandleRegistrationResponse(): registering for feature 1 failed with error 2 2016/09/08 08:37:37.009 5552 4147260224 S CInterProcessNetwork: Received DisconnectIPC from processID 32511 (ProcessType: 2 in Session 2) with reason 1 2016/09/08 08:37:37.009 5552 4147260224 S Process 32511 in session 2 has terminated 2016/09/08 08:37:37.009 5552 4147260224 S TerminalServer::ProcessTerminated_Finalize: process 32511 terminated 2016/09/08 08:37:37.009 5552 4147260224 S SysSessionInfoManager: updating session information for session 2 from GUI 2016/09/08 08:37:37.009 5552 4094196544 S XSession: 2 [SysSession 2 [type=1 tty=4294967295 pseudotty=1 info=1 id= user=root state=unknown active=0 reliable=0]] 2016/09/08 08:37:37.009 5552 4094196544 S Updated sessions: [ 1 ] [ 2 root ] [ 9 ] 2016/09/08 08:37:37.009 5552 4094196544 S UpdateOnlineState m_ManualStop 2016/09/08 08:37:37.010 8 22 GX2 CTcpProcessConnector::HandleRead(): Socket gracefully closed (PID=5552) 2016/09/08 08:37:37.010 8 22 GX2 CTcpProcessConnector::CloseConnection(): PID=5552 2016/09/08 08:37:37.010 8 22 GX2! InterProcessBase::EventFunctionInternal(): IPC-Connection Closed 2016/09/08 08:37:37.010 8 22 GX2 CTcpProcessConnector::CloseConnection(): PID=5552 2016/09/08 08:37:37.010 8 22 GX2 CTcpProcessConnector::CloseConnection(): Shutdown socket returned error 10058: Unknown error 2016/09/08 08:37:37.010 5552 4147260224 S CTcpProcessConnector::HandleRead(): Socket gracefully closed (PID=32511) 2016/09/08 08:37:37.010 5552 4147260224 S CTcpProcessConnector::CloseConnection(): PID=32511 2016/09/08 08:37:37.010 5552 4147260224 S CInterProcessNetwork::NewInterProcessDataAvailable(): ConnectionClosed session=2 ptype=2 2016/09/08 08:37:37.010 5552 4147260224 S UpdateOnlineState m_ManualStop 2016/09/08 08:37:37.010 5552 4147260224 S CTcpProcessConnector::CloseConnection(): Shutdown socket returned error 107: Transport endpoint is not connected 2016/09/08 08:37:37.011 8 22 GX2!! CTcpProcessConnector::CloseConnection(): Shutdown socket returned error 10009: Unknown error, Errorcode=317 2016/09/08 08:37:37.012 8 9 GX2 interprocessbase::SecureNetwork destroyed 2016/09/08 08:37:37.013 8 9 GX2 TVW Terminating GUI slave 2016/09/08 08:37:37.013 8 9 GX2 Wine: Wine DLL freed 2016/09/08 08:37:37.015 32646 4113962752 QX2 TVGuiDelegate: Terminated

I have one question regarding given alias to ip address with port number. For example I am executing jenkins in my local system in port number 8080 and nexus in port number 8081. I will accessing GUI by typing address manually as below. For jenkins: 192.168.122.1:8080 For Nexus: 192.168.122.1:8081 Instead of following above process it is possible to alias names as below. 192.168.122.1:8080 -> jenkins.world 192.168.122.1:8081 -> nexus.world or alias as below. 192.168.122.1:8080 -> go/jenkins 192.168.122.1:8081 -> go/nexus Can you please check and advice about the feasibility of above type of alias in CentOS 7.6 OS.

I want to install TigerVNC on my freshly installed CentOS 7 server, version centos-release-7-4.1708.el7.centos.x86_64. So besides other tutorials I've tried already, I followed the Red Hat guide. However with variable error messages depending on the tutorial I never got the service to start. The following is exactly what I did on a new installation of CentOS 7: yum install tigervnc-server cp /usr/lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@.service vi /etc/systemd/system/vncserver@.service initial file content: [Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=forking User= # Clean any existing files in /tmp/.X11-unix environment ExecStartPre=-/usr/bin/vncserver -kill %i ExecStart=/usr/bin/vncserver %i PIDFile=/home//.vnc/%H%i.pid ExecStop=-/usr/bin/vncserver -kill %i [Install] WantedBy=multi-user.target file content after edit: [Unit] Description=Remote desktop service (VNC) After=syslog.target network.target [Service] Type=forking User=root # Clean any existing files in /tmp/.X11-unix environment ExecStartPre=-/usr/bin/vncserver -kill %i ExecStart=/usr/bin/vncserver %i PIDFile=/home/root/.vnc/%H%i.pid ExecStop=-/usr/bin/vncserver -kill %i [Install] WantedBy=multi-user.target Instructions after file edit: systemctl daemon-reload su - root vncpasswd systemctl start vncserver@:1.service Job for vncserver@:1.service failed because a timeout was exceeded. See "systemctl status vncserver@:1.service" and "journalctl -xe" for details. [root@localhost ~]# systemctl status vncserver@:1.service ● vncserver@:1.service - Remote desktop service (VNC) Loaded: loaded (/etc/systemd/system/vncserver@.service; disabled; vendor preset: disabled) Active: failed (Result: timeout) since Wed 2018-01-03 09:00:17 UTC; 22s ago Process: 2045 ExecStart=/usr/bin/vncserver %i (code=exited, status=0/SUCCESS) Process: 2040 ExecStartPre=/usr/bin/vncserver -kill %i (code=exited, status=2) Jan 03 08:58:50 localhost vncserver: New 'localhost:1 (root)' desktop is localhost:1 Jan 03 08:58:50 localhost vncserver: Creating default startup script /root/.vnc/xstartup Jan 03 08:58:50 localhost vncserver: Creating default config /root/.vnc/config Jan 03 08:58:50 localhost vncserver: Starting applications specified in /root/.vnc/xstartup Jan 03 08:58:50 localhost vncserver: Log file is /root/.vnc/localhost:1.log Jan 03 08:58:50 localhost systemd[1] : PID file /home/root/.vnc/localhost:1.pid not readable (y...art. Jan 03 09:00:17 localhost systemd[1] : vncserver@:1.service start operation timed out. Terminating. Jan 03 09:00:17 localhost systemd[1] : Failed to start Remote desktop service (VNC). Jan 03 09:00:17 localhost systemd[1] : Unit vncserver@:1.service entered failed state. Jan 03 09:00:17 localhost systemd[1] : vncserver@:1.service failed. Hint: Some lines were ellipsized, use -l to show in full. Does anyone have a clue how I can solve this?

There are 32 cores in a system (2 cpus each 16 cores) and I want to limit a user to use only 4 cores (100% usage for that 4 cores). There are two kernel parameter for that according to the manuals: cpu.cfs_quota_us and cpu.cfs_period_us An example on the kernel.org document says: With 500ms period and 1000ms quota, the group can get 2 CPUs worth of runtime every 500ms. # echo 1000000 > cpu.cfs_quota_us /* quota = 1000ms */ # echo 500000 > cpu.cfs_period_us /* period = 500ms */ I want to know how those ms are determined? In my case, I think the quota is 32000000 and the period is 4000000. Am I right? The content of etc/cgconfig.conf is: group ansys { cpu { cpu.cfs_quota_us = 32000000; cpu.cfs_period_us = 4000000; } memory { memory.limit_in_bytes = 8000m; } } But it doesn't work! and I get an error when I run /etc.init.d.cgconfig start, I get this error: Failed to parse /etc/cgconfig.conf or /etc/cgconfig.d [FAILED]Starting cgconfig service: /sbin/cgconfigparser; error loading /etc/cgconfig.conf: Failed to remove a non-empty group

I'm running CENTOS 6.6 on a VPS and am trying to install the ZMQ PHP extension and tried installing using the command shown in the instructions: sudo pecl install zmq-beta However, it fails, showing this as the output: root@host [/zmq]# sudo pecl install zmq-beta downloading zmq-1.1.2.tgz ... Starting to download zmq-1.1.2.tgz (39,573 bytes) ..........done: 39,573 bytes could not extract the package.xml file from "/root/tmp/pear/cache/zmq-1.1.2.tgz" Download of "pecl/zmq" succeeded, but it is not a valid package archive Error: cannot download "pecl/zmq" Download failed install failed I also tried: sudo pecl install -Z zmq-beta And: sudo pecl install --nocompress zmq-beta But I get the same error. Why is this error occuring?

We have experienced a "black screen of death" after booting a CentOS virtual machine running on an Oracle VirtualBox. The screen is completely black, there is no mouse pointer. This seems to be related to upgrading the system, but we are not sure. We've discovered that reinstalling guest additions and rebooting somehow fixes the problem. Here are the steps used to recover: 1. boot the VM, the screen should be black. 2. Ctrl + F2 -> a console login screen should be visible 3. On virtual box menu, [Devices] -> Insert Guest Additions CD Image... 4. Login to your linux system 5. su (or use sudo whenever required) 6. mkdir /media/cdrom 7. mount /dev/sr0 /media/cdrom 8. cd /media/cdrom 9. sh VBoxLinuxAdditions.run uninstall 10. sh VBoxLinuxAdditions.run install 11. reboot Since we now know how to recover from the black screen, this is not a big problem. Still, anyone knows why this happens and how to avoid it?

I am running tigervnc-server on CentOS 6.8, however the gnome desktop won't start for me! I have done a yum groupinstall of "X Window System", "Desktop" and "General Purpose Desktop". On one of my other CentOS VMs (v6.6), installing these packages is sufficient for having the gnome-desktop automatically startup for me when starting a vncserver. I'm running: vncserver :05 -geometry 2048x1024 In /home/user/.vnc/hostname:05.log, I see: vncconfig: unable to open display "hostname:05" xrdb: Connection refused xrdb: Can't open display 'hostname:05' xmodmap: unable to open display 'hostname:05' ** (gnome-session:12313):WARNING **: Cannot open display The VNC server starts, and I'm able to connect via vncviewer, but get a black screen. Is there anything else I can look at to troubleshoot? The log isn't very helpful; I've been googling this problem for days, and haven't found anything that fixes it (Ex: made sure I'm in runlevel 5, I re-installed the desktop packages mentioned above, removed .vnc directory, stepped through xstartup, tried comparing various settings with my other VM where the gnome desktop is working) Anyone know of something else I can look at to troubleshoot this issue? Any other logs, or things to check?

I have a Centos 7.9 with PHP 7.4.33 pre installed. followed this command steps for upgrading the php version to 8.1: sudo yum install -y https://rpms.remirepo.net/enterprise/remi-release-7.rpm sudo yum install -y yum-utils sudo yum-config-manager --enable remi-php81 sudo yum-config-manager --disable remi-php74 sudo yum install -y php php-common php-opcache php-mcrypt php-cli php-gd php-curl php-mysqlnd but at the end it returns: No package php available. No package php-common available. No package php-opcache available. No package php-mcrypt available. No package php-cli available. No package php-gd available. No package php-curl available. No package php-mysqlnd available. Error: Nothing to do retried with this: yum --disablerepo="*" --enablerepo="remi-php81" list available got same return. also tried: sudo yum clean all sudo yum update and: sudo yum install -y php81 php81-common php81-opcache php81-cli php81-gd php81-curl php81-mysqlnd Same... . what should i do? --------- Update: I have a Cpanel WHM on this server. in php version manager, i was able to change the version to 8. But what I want is 8.1 and it is not among the options.

Is there a real way to install gcc without yum on CentOS 7? On my system yum doesn't work: yum update -bash: /usr/bin/yum: /usr/bin/python2.7: bad interpreter: No such file or directory And when I want to install python2.7 it needs GCC that I don't know where it is on my system? which gcc /usr/bin/which: no gcc in (/root/anaconda2/bin:/root/anaconda3/bin:/root/anaconda3/condabin:/usr/local/bin:/usr/local/bin:/usr/local/bin:/root/anaconda3/bin:/root/anaconda3/condabin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/root/bin) And when I search how to install GCC without yum, most of them need yum! Is there really a way to solve this problem?

I am trying to run an executable that makes use of the libcrypto and libsll libraries. When I run the executable I get the following error PROGRAM: error while loading shared libraries: libcrypto.so.10: cannot open shared object file: No such file or directory I understand that the above message is because the executable cannot find the associated library. The system has both pairs of libraries included in "/usr/lib/x86_64-linux-gnu", which I installed using the synaptic package manager. I have tried to generate the symbolic links ln -s /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0 /usr/lib/x86_64-linux-gnu/libcrypto.so.10 ln -s /usr/lib/x86_64-linux-gnu/libcrypto.so.1.1 /usr/lib/x86_64-linux-gnu/libcrypto.so.10 ln -s /usr/lib/x86_64-linux-gnu/libcrypto.so /usr/lib/x86_64-linux-gnu/libcrypto.so.10 but in all these cases I get the following error message: PROGRAM: /usr/lib/x86_64-linux-gnu/libcrypto.so.10: version `libcrypto.so.10' not found (required by PROGRAM) I am currently using Ubuntu 20.0, and the executable I am trying to use was compiled for RHEL 6.6. My question is: Should I install RHEL (or centOS) to be able to use that executable?, or, the error is due to the fact that I am using the wrong version of the libraries.

I installed kernel 4.4 from ELRepo, along with kernel-lt-tools, kernel-lt-devel & kernel-lt-headers. I also installed dkms. vboxadd-install.log contains this: grep: Unmatched ) or \) The vboxadd-setup.log file contains this: Error building the module: modprobe vboxguest failed Is there anything I'm missing?

I am running CentOS 8.5.2111. I am not able to access 2TB external USB-C drive (exFAT), but I can access 256 GB external exFAT drive When I connect the 2TB USB-C exFAT drive, it says: Unable to access "csr" Error mounting /dev/sdb1 at /run/media/jzy7mw/csr: Unknown filesystem type ;exfat' (csr is the drive name) It works fine on Windows PC and chkdsk found no issues: C:\>chkdsk d: /f /x The type of the file system is exFAT. Volume Serial Number is 0EFA-B9CE Windows is verifying files and folders... Volume label is csr. File and folder verification is complete. Windows has scanned the file system and found no problems. No further action is required. It is doing the same when connected back to CentOS PC I need assistance

I'm running a CentOS freash out of Azure, with ClamAV installed on it, by running the following commands: yum install -y epel-release yum install -y clamav When installed, I'm running the following command to update the various databases: freshclam I get the following output (Last part of the output): Time: 0.1s, ETA: 0.0s [=============================>] 657.84KiB/657.84KiB Downloading database patch # 25864... Time: 0.2s, ETA: 0.0s [=============================>] 992.77KiB/992.77KiB Downloading database patch # 25865... Time: 0.1s, ETA: 0.0s [=============================>] 903.99KiB/903.99KiB Testing database: '/var/lib/clamav/tmp.628c5/clamav-a8e48a60b669aa6a0211c18d734f61be.tmp-daily.cld' ... ERROR: Database load killed by signal 9 ERROR: Database test FAILED. ERROR: Unexpected error when attempting to update database: daily WARNING: fc_update_databases: fc_update_database failed: Test failed (8) ERROR: Database update process failed: Test failed (8) ERROR: Update failed. I find it weird that no other has had the same issue using the distro, as I have not any super specific steps, just followed steps from the page. Hope someone is able to help me...

While following https://access.redhat.com/solutions/64069 General documentation of the system state both prior to and after patching is always good practice. This should include running package-cleanup with following flags, --orphans, --problems, --dupes, --leaves. Looking for orphans (packages which are not available from currently configured repositories) I did get kernel-3.10.0-1127.el7.x86_64 and it would be true, because I've installed CentOS 7.8 and upgraded to 7.9 and the kernel package is in the https://vault.centos.org/7.8.2003/os/Source/SPackages/ repo not the 7.9. [root@localhost boot]# package-cleanup --orphans Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.wielun.net * extras: centos.wielun.net * updates: centos.wielun.net kernel-3.10.0-1127.el7.x86_64 [root@localhost boot]# rpm -qa kernel kernel-3.10.0-1160.6.1.el7.x86_64 kernel-3.10.0-1127.el7.x86_64 I can imagine that it would be advisable to run the above command in case I would like to use yum history undo to revert last made changes, and that a given rpm package would have to be available on the system, but if it was not removed during yum update then do I need really to care if the package is marked as orphaned ? Next, I executed the following command, to get a list of leaves ( Leaf nodes are RPMs that are not relied upon by any other RPM): [root@localhost boot]# package-cleanup --leaves Loaded plugins: fastestmirror libsysfs-2.1.0-16.el7.x86_64 [root@localhost boot]# rpm -q --requires libsysfs-2.1.0-16.el7.x86_64 /sbin/ldconfig /sbin/ldconfig libc.so.6()(64bit) libc.so.6(GLIBC_2.2.5)(64bit) libc.so.6(GLIBC_2.3.4)(64bit) libc.so.6(GLIBC_2.4)(64bit) rpmlib(CompressedFileNames) Running transaction check ---> Package libsysfs.x86_64 0:2.1.0-16.el7 will be erased --> Finished Dependency Resolution Dependencies Resolved ============================================================================================================================================================================================= Package Arch Version Repository Size ============================================================================================================================================================================================= Removing: libsysfs x86_64 2.1.0-16.el7 @anaconda 146 k Transaction Summary ============================================================================================================================================================================================= Remove 1 Package Per my understanding yum resolved all the dependencies and it looks like I'm free to remove the pacakage, but I'm wondering about the output of the rpm -q --provides command. Is it correct to say that the 3 items listed is stuff that got installed together with the libsysfs.x86_64 0:2.1.0-16.el7 package AND since yum resolved all dependencies and no other stuff on the system requires this package + the packages/shared libraries it provides it can be removed without any issues ? If that is true, why I'm not able to list the files installed as part of that rpm ? [root@localhost boot]# rpm -qa libsysfs libsysfs-2.1.0-16.el7.x86_64 [root@localhost boot]# [root@localhost boot]# [root@localhost boot]# rpm -qlp libsysfs-2.1.0-16.el7.x86_64 error: open of libsysfs-2.1.0-16.el7.x86_64 failed: No such file or directory Thank you for any clarification is possible !

I am trying to send a command to netcat which will result into an output and I want to save that output to a file. while true; do echo "showHistory userx"; done | nc -w1 xxx.xxx.xxx.xx 2222 > out.txt & I tried a lot of google searches and read a lot of stackexchange questions but could not solve it. I played around with while, tee, mkfifo but no luck. The file out.txt remains blank but has a lot of NUL chars Edit: I have updated showhistory to showHistory userx in order to highlight that it is a command to be supplied over telnet/netcat session

I have a CentOS 7 VPS where I am trying to install virtual host following the instruction from https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-virtual-hosts-on-centos-7 . I have completed step five of this tutorial. Then when I try to restart apache I failed: $ sudo apachectl restart [sudo] password for student01: Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details. $ sudo systemctl status httpd.service -l ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since বুধ 2018-04-11 14:29:55 +06; 4min 13s ago Docs: man:httpd(8) man:apachectl(8) Process: 11116 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE) Process: 11115 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE) Main PID: 11115 (code=exited, status=1/FAILURE) এপ্রি 11 14:29:55 localhost.localdomain systemd: Starting The Apache HTTP Server... এপ্রি 11 14:29:55 localhost.localdomain systemd: httpd.service: main process exited, code=exited, status=1/FAILURE এপ্রি 11 14:29:55 localhost.localdomain kill: kill: cannot find process "" এপ্রি 11 14:29:55 localhost.localdomain systemd: httpd.service: control process exited, code=exited status=1 এপ্রি 11 14:29:55 localhost.localdomain systemd: Failed to start The Apache HTTP Server. এপ্রি 11 14:29:55 localhost.localdomain systemd: Unit httpd.service entered failed state. এপ্রি 11 14:29:55 localhost.localdomain systemd: httpd.service failed. Now, What can I do? **Edit** /var/log/httpd/error_log [Sun Apr 08 03:23:02.040472 2018] [auth_digest:notice] [pid 20339] AH01757: generating secret for digest authentication ... [Sun Apr 08 03:23:02.041376 2018] [lbmethod_heartbeat:notice] [pid 20339] AH02282: No slotmem from mod_heartmonitor [Sun Apr 08 03:23:02.094944 2018] [mpm_prefork:notice] [pid 20339] AH00163: Apache/2.4.6 (CentOS) PHP/5.4.16 configured -- resuming normal operations [Sun Apr 08 03:23:02.094956 2018] [core:notice] [pid 20339] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND' [Sun Apr 08 05:35:00.720095 2018] [autoindex:error] [pid 30351] [client 66.102.6.114:59512] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Sun Apr 08 09:42:05.222459 2018] [autoindex:error] [pid 30347] [client 52.34.24.33:31614] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Sun Apr 08 11:06:56.497939 2018] [autoindex:error] [pid 30790] [client 54.145.188.132:22136] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Sun Apr 08 14:13:12.731870 2018] [autoindex:error] [pid 32239] [client 185.198.167.29:51750] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Sun Apr 08 19:06:12.521882 2018] [autoindex:error] [pid 30348] [client 180.234.211.210:57961] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Sun Apr 08 19:06:15.004820 2018] [autoindex:error] [pid 30790] [client 159.203.81.93:36934] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive, referer: http://csedu.cf/noindex/css/open-sans.css [Sun Apr 08 21:20:59.825782 2018] [autoindex:error] [pid 1338] [client 66.102.6.114:52716] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 00:25:17.935192 2018] [autoindex:error] [pid 30348] [client 178.73.215.171:58579] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 02:50:04.593613 2018] [autoindex:error] [pid 30351] [client 141.8.142.139:50790] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 03:17:12.517868 2018] [autoindex:error] [pid 30347] [client 222.186.173.47:3128] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 04:10:37.253275 2018] [autoindex:error] [pid 31639] [client 164.132.91.1:38580] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 05:38:34.833406 2018] [autoindex:error] [pid 30350] [client 66.249.70.23:49821] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 05:42:25.297309 2018] [autoindex:error] [pid 30790] [client 66.102.6.118:49432] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 08:37:04.505363 2018] [autoindex:error] [pid 1338] [client 66.249.64.17:47360] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 11:34:29.890432 2018] [autoindex:error] [pid 30349] [client 60.10.114.129:4892] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 12:21:16.013396 2018] [autoindex:error] [pid 30351] [client 66.249.64.147:61628] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 13:16:44.877416 2018] [autoindex:error] [pid 30348] [client 66.249.64.18:48720] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 13:28:05.782783 2018] [autoindex:error] [pid 31639] [client 54.67.59.131:47628] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 15:59:59.764704 2018] [autoindex:error] [pid 30349] [client 66.102.6.116:50307] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 20:48:48.419540 2018] [autoindex:error] [pid 30349] [client 211.23.154.138:44382] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 20:49:19.596952 2018] [autoindex:error] [pid 30790] [client 146.185.223.240:61291] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 20:49:25.365282 2018] [:error] [pid 32239] [client 146.185.223.240:53694] script '/var/www/html/xmlrpc.php' not found or unable to stat [Mon Apr 09 20:49:30.881307 2018] [autoindex:error] [pid 1338] [client 146.185.223.240:57697] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 21:59:59.860423 2018] [autoindex:error] [pid 30790] [client 52.41.211.72:54578] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 22:40:17.025377 2018] [autoindex:error] [pid 32239] [client 66.102.6.118:63371] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Mon Apr 09 23:54:26.754931 2018] [autoindex:error] [pid 30350] [client 141.8.142.139:44732] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 02:04:12.364159 2018] [autoindex:error] [pid 30350] [client 66.249.64.17:46304] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 04:31:13.380666 2018] [autoindex:error] [pid 30349] [client 66.249.79.21:45988] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 05:11:35.587141 2018] [autoindex:error] [pid 32239] [client 66.249.79.19:52379] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 05:41:26.176137 2018] [autoindex:error] [pid 1338] [client 66.102.6.118:51864] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 05:57:36.520454 2018] [autoindex:error] [pid 30347] [client 66.249.79.110:36194] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 12:44:25.251573 2018] [autoindex:error] [pid 32239] [client 52.34.24.33:60587] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 13:08:39.896323 2018] [autoindex:error] [pid 1338] [client 141.8.142.139:53710] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 13:31:14.603115 2018] [autoindex:error] [pid 30790] [client 180.234.211.210:44472] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 13:42:16.181640 2018] [autoindex:error] [pid 30351] [client 107.170.192.57:54176] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 16:31:20.752769 2018] [autoindex:error] [pid 30349] [client 196.52.43.109:6666] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 17:43:24.572519 2018] [autoindex:error] [pid 1338] [client 66.102.6.118:64283] AH01276: Cannot serve directory /var/www/html/: No matching DirectoryIndex (index.html,index.php) found, and server-generated directory index forbidden by Options directive [Tue Apr 10 23:32:45.653283 2018] [mpm_prefork:notice] [pid 20339] AH00170: caught SIGWINCH, shutting down gracefully (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs (13)Permission denied: AH00091: httpd: could not open error log file /var/www/example2.com/error.log. AH00015: Unable to open logs