I'd like to generate a full-page QR code from the command line. The following command sort of accomplishes this: qrencode -o- https://example.net | convert png:- -gravity center -units pixelsperinch -density 300 -resize 2551x3295 -extent 2551x3295 qrcode.pdf Unfortunately, the resulting QR code is quite blurry, as though imagemagick is doing some sort of unwanted antialiasing. Is there a way to make the code completely crisp, or just a better/simpler approach to generating a PDF file with a full-page QR code?

I want to be able to ascertain what kernel is in use across modern, UNIX-derivative OSes. This appears feasible, considering that utilities like uname exist on multiple OSes with different kernels. However, if we consider the venerable uname to be a usable example, it soon fails at this: it prints “Darwin” on macOS, which isn't the name of the *kernel*. It's XNU. (macOS is, in effect, the DE running atop the Darwin OS). In contrast, uname on cpe:/o:fedoraproject:fedora:42 prints “Linux”, which is the name of the kernel, rather than the base of the OS (GNU's CoreUtils). That kind of inconsistency renders it unreliable for this. My goal might seem niche, because it is. However, if I've got a system running macOS, another running Hurd-based Debian , and another running Linux-based Fedora, what tool can I utilise to ascertain the kernel in use? (I suppose I could just look in /boot/efi?)

After googling a bit I couldn't find a simple way to use a shell command to generate a random decimal integer number included in a specific range, that is between a minimum and a maximum. I read about /dev/random, /dev/urandom and $RANDOM, but none of these can do what I need. Is there another useful command, or a way to use the previous data?

From a bash shell script, I am creating a folder and storing the mysqldump there. I am sure that there is no command related to permissions in my script. To allow an other user to access these files, I have used ACL, but when he tried to access the file, he got permission denied issue, and issue is with effective permissions of ACL. The owner of the directory is ola and new user who is trying to access the folder is uber and folder is gettaxi ### Permissions of Parent directory [/omega/olabooktmp]# getfacl . # file: . # owner: ola # group: ola user::rwx user:uber:rwx group::r-x mask::rwx other::r-x default:user::rwx default:user:uber:rwx default:group::r-x default:mask::rwx default:other::r-x ### Permissions of Child directory [/omega/olabooktemp]# getfacl gettaxi/ # file: gettaxi/ # owner: ola # group: ola user::rwx user:uber:rwx #effective:--- group::r-x #effective:--- mask::--- other::--- default:user::rwx default:user:uber:rwx default:group::r-x default:mask::rwx default:other::r-x I see like for new directory gettaxi mask permissions are mask::---, so I think this is causing issue, but I am unable to understand completely and how to solve this issue. Any suggestions greatly appreicated. Thank you.

I have the following doubt about TinyCore: how to can I resize the boot partition (the only partition available) without losing data? I believe I have to: - boot to command prompt using some live system - check what partition I want to resize (fdisk -l) - unmount the partition, then run: resize2fs -p /dev/sdxy new_sizeM (eg /dev/sdc1 7600M). Unmounting is done with umount and checking partition with fdisk -l, right?

I am trying to access the docker image labels from Python as follows hostname = socket.gethostname() cmd = "sudo curl --unix-socket /var/run/docker.sock http:/containers/" + hostname + "/json" output = os.popen(cmd).read() But, the thing is I am getting the following error: We trust you have received the usual lecture from the local System Administrator. It usually boils down to these three things: #1) Respect the privacy of others. #2) Think before you type. #3) With great power comes great responsibility. sudo: no tty present and no askpass program specified It's one of the fancy messages by Unix from some other posts I read from StackOverflow. I am following the below link https://stackoverflow.com/questions/37439887/how-to-access-the-metadata-of-a-docker-container-from-a-script-running-inside-th Only thing is I want to run these things from Python not from the Terminal. Also, FYI, I get the response when I run the same command from the terminal. I tried appending the following piece in Dockerfile RUN echo "root ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers Thanks

I installed the editor Atom as snap. Normally i can start Atom from command line by typing atom . but after reinstalling my Ubuntu system I get an error: > nohup: failed to run command '/tmp/troubadix/atom-build/Atom/atom': No such > file or directory Every other program installed via Snap or Deb starts from terminal just fine.

I've to restore a large file from a NAS backup on Solaris 10 ZFS. I'm using this following command: rsync -av user@xxx.xxx.xxx.xxx:from/NAS/files/system to/solaris/files/system And I've got this error: Disconnecting: Corrupted MAC on input. rsync: connection unexpectedly closed (3778664937 bytes received so far) [receiver] rsync: [generator] write error: Broken pipe (32) rsync error: error in rsync protocol data stream (code 12) at io.c(226) [receiver=3.1.0] rsync error: error in socket IO (code 10) at io.c(837) [generator=3.1.0 rsync Disconnecting: Corrupted MAC on input. After a little research the solution should be: ethtool -K eth0 tx off rx off As the ethtool command doesn't exist on Solaris, I should use the ndd utility in interactive mode. I didn't find any good explanation and the man page is poor, for getting the equivalent of the command line above. I'm missing something maybe.

Can someone tell how to submit a one liner command using nbq command line? Submitted multiple commands in Linux works fine but not in nbq mode as below. find /nfs/disks/test_dir/ -name .snapshot -prune -o -printf '%s %p\n'" | sort -nr | head -n 50 | tee log this works just find in Linux capturing the top 50 files in the check area. nbq -P -q -c -J --task-name checkdisk find /nfs/disks/test_dir/ -name .snapshot -prune -o -printf '%s %p\n'" | sort -nr | head -n 50 | tee log failed as it just executing the first part without recognizing the pipe.

I want to delete specific two consecutive lines matching patterns from specific line from a file. For e.g. file contents are like below. a b c Name: 123 xyz Name: 456 abc I want to find the lines starting from line 4, matching 1st line pattern starting with Name: and matching 2nd line pattern starting with whitespace and delete the two consecutive lines. Any efficient way to do this in shell using sed or something else? To be a bit more clear, I want to remove signing/checksum information from the MANIFEST.MF. Sample MANIFEST.MF like below. From the below manifest file, I want to remove the entry Name: where Name: entry can be in one line or 2(or more) lines. Initially my solution was like find the first Name: entry followed by SHA-256-Digest: entry and delete to the end of the file. Unfortunately this solution has a problem of removing one needed entry in the middle. For e.g. NetBeans-Simply-Convertible: is also being removed. So, now I want to remove Name: entry if available in 1 line or entry spanned across 2 or more lines. But I should not lose entries like NetBeans-Simply-Convertible: while removing Name: entries. Already I am removing SHA-256-Digest: entries with the below command on file with sed -i "/^\SHA-256-Digest: /d" $manifest_file -------------------------------- Manifest-Version: 1.0 Version-Info: .... Name: com/abc/xyz/pqr/client/relationship/message/notifier/Relati onshipUpdateNotifierFactory.class SHA-256-Digest: cSSyk6Y2L2F9N6FPtswUkxjF2kelMkGe4bFprcQ+3uY= Name: com/abc/xyz/pqr/client/relationship/ui/BaseRelationshipView $5.class SHA-256-Digest: w9HgRjDuP024U4CyxeKPYFe6rzuzxZF3b+9LVG36XP8= Name: com/abc/xyz/pqr/client/impl/MofRelationshipAgentImpl.class SHA-256-Digest: GwIBIU+UdPtjyRhayAVM90Eo+SwCT/kP65dI59adEnM= Name: com/abc/xyz/pqr/client/settings/ConvertibleProperties.class NetBeans-Simply-Convertible: {com/abc/xyz/pqr/client/settings}Con vertibleProperties SHA-256-Digest: 5FszAtfpPXcLx/6FBWbfeg6E4fwFMRozV+Q+3rReATc= ... Expected Output: Manifest-Version: 1.0 Version-Info: .... NetBeans-Simply-Convertible: {com/abc/xyz/pqr/client/settings}Con vertibleProperties ...

I am trying to track the completion of a silent installer by detecting the presence of the last file created by it, but in order to do that I need to find out which file that is. Is there any way to do this? I have found a lot of answers on how to find the most recently *modified* file, but that is not effective since many of these files were modified by the original creator in a different order than they are added to the system by the installer.

Hello (I'm no hard core coder:), I try to develop a script to do some very basic monitoring on an IBM SVC. My goal is to get some information about the nodes and my quroum status and then send this information by mail. here's my code so far (I understood that grep command doesn't "work" on CLI for SVC). #check nodes of the cluster with lsnodes and parse status ssh admin@SVCName superuser>svcinfo lsnode | while read id name sn wwnn status temp;do echo $name" "$status;done #check quorum status with lsquorum and parse status ssh admin@SVCName superuser>svcinfo lsquorum | while read quorum_index status id name controller_id controller_name active temp; do echo $controller_name" "$active;done My problem is sending an email from the CLI to designed users. I don't find any valuable information anywhere on the internet. HINT: this script will be deployed on a jumppoint server (probably a windows server) in production, I cannot allow the installation of any exectution environment such as cigwin or perl or anything). Could you help me with that ?

There are tons of resources that tell how to run several instances of Firefox in parrallel. I can't find *any* that tells me how to configure a command (on a command line, start menu item, or panel button) so that: - the first click opens Firefox with a predetermined profile *New Window" in Firefox, except triggered from a command line. To be explicit, I do not want to involve other profiles. My motivation is that I have lots of desktops and lots of browser windows, and often finding that one window for the profile I want is a lot harder than to just click a button that is always going to be in the same place - on the panel. For the first bullet, I currently use the command "firefox --no-remote -P "thisprofile" %u" and it has always worked as intended. However, for the second bullet, I invariably get the error *"Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system"*. **Clarification:** I have two panel buttons that start separate Firefox profiles. These use "firefox --no-remote -P "ThisOrThatProfile" %u". If I omit any other parameters and just supply "--new-window", it correctly starts new windows *of the default profile* (whether that profile is already running or not). The thing is, I cannot figure out how to start new windows *for specific (non-default) profiles*.

I am installed KDE Plasma (on Fedora 42) in an LXC container. My goal is setup KDE remote desktop and use it as a headless desktop environment. The issue is krdpserver stores the password for the authorized users in the user's kwallet. When I try to use kwallet-query to inspect the wallet, it says the wallet doesn't exist. Upon investigation, I found that it didn't initialize a new wallet. Upon trying to figure out how to do it from the CLI I can find lots of information on reading and writing to the wallet. But nothing about how to set up a new wallet from the CLI. Does anyone know how to initialize a new wallet from the command line?

I just found out sudo insults, and I would think it would be fun to get those slanders out through festival , but only the insults - how to do that on Linux ?

How or where were these pools created? Where are configuration files? $ virsh pool-list --all Name State Autostart ------------------------------------------- default active yes Downloads active yes $ virsh pool-info Downloads Name: Downloads UUID: fdbe7407-67c4-405d-8e46-9c2695a8b353 State: running Persistent: yes Autostart: yes Capacity: 219.88 GiB Allocation: 34.87 GiB Available: 185.01 GiB $ virsh pool-info default Name: default UUID: cb72b02e-b436-4ec9-9460-d297744c4c69 State: running Persistent: yes Autostart: yes Capacity: 219.88 GiB Allocation: 34.95 GiB Available: 184.93 GiB I believe that the pools were created by the virt-manager GUI. Is there free space on default? I think that the Downloads pool is probably superfluous.

Ok, I realise that I risk a religious war asking a question about text editors, but here goes. # Requirements - Mostly used for config file edits - Text based not GUI - Available for Raspian flavour of Debian - No learning required for a Windows/Mac GUI user (no vi/vim) - Makes full use of keys found on modern keyboards, i.e. home, end, pgup, pgdn, del - Use keyboard shortcuts found in pretty much all GUI apps, e.g. Undo (Ctrl-Z), Redo (Shift-Ctrl-Z), Select All (Ctrl-A), Cut (Ctrl-X), Copy (Ctrl-C), Paste (Ctrl-V), Expand selection (Shift-Arrow), Skip word (Ctrl-Arrow), Delete selection (Del) etc - **Optional**: mouse support for changing cursor position and selecting text Surely this isn't a big ask in this day and age?

I have tried to install Howdy, but it would always return with this message: >>> Upgrading pip to the latest version error: externally-managed-environment × This environment is externally managed ╰─> To install Python packages system-wide, try apt install python3-xyz, where xyz is the package you are trying to install. If you wish to install a non-Kali-packaged Python package, create a virtual environment using python3 -m venv path/to/venv. Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make sure you have pypy3-venv installed. If you wish to install a non-Kali-packaged Python application, it may be easiest to use pipx install xyz, which will manage a virtual environment for you. Make sure you have pipx installed. For more information, refer to the following: * https://www.kali.org/docs/general-use/python3-external-packages/ * /usr/share/doc/python3.13/README.venv note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages. hint: See PEP 668 for the detailed specification. Error while running last command dpkg: error processing package howdy (--configure): installed howdy package post-installation script subprocess returned error exit status 1 Processing triggers for doc-base (0.11.2) ... Processing 1 added doc-base file... Processing triggers for libc-bin (2.41-6) ... Processing triggers for man-db (2.13.1-1) ... Processing triggers for kali-menu (2025.3.0) ... Errors were encountered while processing: pypy3 howdy Notice: Download is performed unsandboxed as root as file '/home/tmr/Downloads/howdy_2.6.1.deb' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: Permission denied) Error: Sub-process /usr/bin/dpkg returned an error code (1) Sorry for my bad English, but I can only describe this to the best of my ability. Hope you guys can lend me a helping hand. Thanks alot! Everything was fine until the terminal returns me with error like this (this is from running pypy3 install). When I try to run pypy3 and pypy3-venv, the computer will fails to execute and return error as below. I have tried to remove pypy3 and run update && upgrade, then try reinstalling it again to no avail. When I run anything that need update or installation, the computer would encounter pypy3 or pypy3-venv, then return an error code that is ambiguous that I cannot seems to understand. Continue? [Y/n] y Selecting previously unselected package pypy3-lib:amd64. (Reading database ... 503604 files and directories currently installed.) Preparing to unpack .../pypy3-lib_7.3.19+dfsg-2_amd64.deb ... Unpacking pypy3-lib:amd64 (7.3.19+dfsg-2) ... Setting up pypy3-lib:amd64 (7.3.19+dfsg-2) ... Selecting previously unselected package pypy3. (Reading database ... 504854 files and directories currently installed.) Preparing to unpack .../pypy3_7.3.19+dfsg-2_amd64.deb ... Unpacking pypy3 (7.3.19+dfsg-2) ... Setting up pypy3 (7.3.19+dfsg-2) ... running pypy3 rtupdate hooks for 7.3 RPython traceback: File "rpython_jit_metainterp.c", line 59312, in BlackholeInterpreter_run File "rpython_jit_metainterp_2.c", line 13519, in dispatch_loop Fatal RPython error: AssertionError Aborted error running pypy3 rtupdate hook public_modules.rtupdate dpkg: error processing package pypy3 (--configure): installed pypy3 package post-installation script subprocess returned error exit status 4 Processing triggers for man-db (2.13.1-1) ... Processing triggers for kali-menu (2025.3.0) ... Errors were encountered while processing: pypy3 Error: Sub-process /usr/bin/dpkg returned an error code (1) Later, when I try to run sudo apt update && upgrade without autoremoving pypy3, it would try to reinstall again and again 3 packages that are used for Howdy, then froze or return error code 1 or 4. By then, the computer would decline to run with system having apt-lock (I think so) and when I run sudo dpkg --configure -a Then: Setting up howdy (2.6.1) ... /var/lib/dpkg/info/howdy.postinst:145: SyntaxWarning: invalid escape sequence '\w' "davisking-dlib-\w+/(dlib/(http_client|java|matlab|test/)|" Attempting installation of missing data files Downloading 3 required data files... dlib_face_recognition_resnet_model_v1. 100%[===========================================================================>] 20,44M 6,33MB/s in 3,5s mmod_human_face_detector.dat.bz2 100%[===========================================================================>] 678,41K 1,79MB/s in 0,4s shape_predictor_5_face_landmarks.dat.b 100%[===========================================================================>] 5,44M 6,74MB/s in 0,8s Unpacking... Setting up pypy3 (7.3.19+dfsg-2) ... running pypy3 rtupdate hooks for 7.3 RPython traceback: File "pypy_interpreter.c", line 59719, in PythonAstCompiler__compile_ast File "pypy_interpreter_astcompiler.c", line 1786, in compile_ast File "pypy_interpreter_astcompiler.c", line 13555, in PythonCodeGenerator__handle_body File "pypy_interpreter_astcompiler.c", line 21988, in PythonCodeGenerator__visit_body File "pypy_interpreter_astcompiler_1.c", line 52070, in PythonCodeGenerator_visit_ClassDef File "pypy_interpreter_astcompiler_2.c", line 2157, in PythonCodeGenerator_sub_scope File "pypy_interpreter_astcompiler_1.c", line 49416, in ClassCodeGenerator__compile File "pypy_interpreter_astcompiler.c", line 13555, in PythonCodeGenerator__handle_body File "pypy_interpreter_astcompiler.c", line 21988, in PythonCodeGenerator__visit_body File "pypy_interpreter_astcompiler_1.c", line 53495, in PythonCodeGenerator_visit_FunctionDef File "pypy_interpreter_astcompiler_2.c", line 6272, in _visit_function__FunctionCodeGenerator File "pypy_interpreter_astcompiler_2.c", line 2170, in PythonCodeGenerator_sub_scope File "pypy_interpreter_astcompiler.c", line 8862, in PythonCodeMaker_assemble File "pypy_interpreter_astcompiler.c", line 17133, in PythonCodeMaker__finalize_blocks File "pypy_interpreter_astcompiler.c", line 27812, in PythonCodeMaker_optimize_unreachable_code Fatal RPython error: AssertionError Aborted error running pypy3 rtupdate hook public_modules.rtupdate dpkg: error processing package pypy3 (--configure): installed pypy3 package post-installation script subprocess returned error exit status 4 Errors were encountered while processing: pypy3

How can I run command in bash to kill all python scripts except script called test.py and the grep's pid itself, in case we are using something like ps -ef |grep I think I can use something like pgrep python to ignore the grep process, but how do I also exclude the test.py script? I know there is an option to do grep -v, is there option to do pgrep -v ***Clarification***: except grep process- means when we do for example ps -ef |grep test1.pywe get also the grep pid that used to bring this result. I don't want to kill it as this process is no longer exist in the stage that results are shown.

journalctl list provides an -e option to list from the end, rather than the default start. Can I do the same in coredumpctl list? I ask because I've a lot of coredumps.