installation of wifi in debian

~$ lspci -nn 00:00.0 Host bridge : Intel Corporation 2nd Generation Core Processor Family DRAM Controller [8086:0104] (rev 09) 00:02.0 VGA compatible controller : Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) 00:16.0 Communication controller : Intel Corporation 6 Series/C200 Series Chipset Family MEI Controller #1 [8086:1c3a] (rev 04) 00:16.3 Serial controller : Intel Corporation 6 Series/C200 Series Chipset Family KT Controller [8086:1c3d] (rev 04) 00:19.0 Ethernet controller : Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04) 00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04) 00:1b.0 Audio device : Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1c20] (rev 04) 00:1c.0 PCI bridge : Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 1 [8086:1c10] (rev b4) 00:1c.1 PCI bridge : Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 2 [8086:1c12] (rev b4) 00:1c.3 PCI bridge : Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 4 [8086:1c16] (rev b4) 00:1c.4 PCI bridge : Intel Corporation 6 Series/C200 Series Chipset Family PCI Express Root Port 5 [8086:1c18] (rev b4) 00:1d.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 [8086:1c26] (rev 04) 00:1f.0 ISA bridge : Intel Corporation QM67 Express Chipset Family LPC Controller [8086:1c4f] (rev 04) 00:1f.2 SATA controller : Intel Corporation 6 Series/C200 Series Chipset Family 6 port SATA AHCI Controller [8086:1c03] (rev 04) 00:1f.3 SMBus [0c05]: Intel Corporation 6 Series/C200 Series Chipset Family SMBus Controller [8086:1c22] (rev 04) 03:00.0 Network controller : Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] [8086:0085] (rev 34) 0d:00.0 System peripheral : Ricoh Co Ltd PCIe SDXC/MMC Host Controller [1180:e823] (rev 07) As [he was saying](https://unix.stackexchange.com/questions/645901/having-issue-with-debian-installation#comment1210259_645901) . I was following [the Wiki](https://wiki.debian.org/iwlwifi) . root@debian:/home/istiak# apt update && apt install firmware-iwlwifi Hit:1 http://security.debian.org/debian-security buster/updates InRelease Hit:2 http://deb.debian.org/debian buster InRelease Hit:3 http://deb.debian.org/debian buster-updates InRelease Reading package lists... Done Building dependency tree Reading state information... Done All packages are up to date. Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package firmware-iwlwifi root@debian:/home/istiak# modprobe -r iwlwifi ; modprobe iwlwifi bash: modprobe: command not found bash: modprobe: command not found When I try to run iwconfig or ifconfig I get that command not found. How can I install wifi driver? I have installed(iwlwifi-6000g2a-ucode-18.168.6.1.tgz) from [here](https://www.intel.com/content/www/us/en/support/articles/000005511/wireless.html) . When I extracted I got it(iwlwifi-6000g2a-6.ucode). What I have to do with it? Output of /usr/sbin/modprobe --version : kmod version 26 +XZ -ZLIB +OPENSSL -EXPERIMENTAL iwconfig : root@debian:~# /sbin/iwconfig enp0s25 no wireless extensions. wwp0s29u1u4 no wireless extensions. wlp3s0 IEEE 802.11 ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=0 dBm Retry short limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off lo no wireless extensions. lspci -knn | grep -i net -A3 : istiak@debian:~$ lspci -knn | grep -i net -A3 00:19.0 Ethernet controller : Intel Corporation 82579LM Gigabit Network Connection [8086:1502] (rev 04) Subsystem: Lenovo 82579LM Gigabit Network Connection (Lewisville) (ThinkPad T520) [17aa:21ce] Kernel driver in use: e1000e Kernel modules: e1000e 00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 04) -- 03:00.0 Network controller : Intel Corporation Centrino Advanced-N 6205 [Taylor Peak] [8086:0085] (rev 34) Subsystem: Intel Corporation Centrino Advanced-N 6205 AGN [8086:1311] Kernel driver in use: iwlwifi Kernel modules: iwlwifi