Debian9 network settings

Debian9 install and configure wifi

install wifi firmware

• add non-free repositories to /etc/apt/sources

aptitude install iwlwifi-firmaware

Load the iwlwifi module

modprobe -r iwlwifi ; modprobe iwlwifi

Will give the links of the physical addresses

ls -l /sys/class/net

sudo dmesg | egrep --color -C 2 'eth[0-9]|e[nm][0-9]|p[0-9][ps][0-9]|wlan|wl[0-9]|wlp[0-9]'

lrwxrwxrwx 1 root root 0 Feb  5 07:23 enp0s25 -> ../../devices/pci0000:00/0000:00:19.0/net/enp0s25
lrwxrwxrwx 1 root root 0 Feb  5 07:23 lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 root root 0 Feb  5 07:40 wlp3s0 -> ../../devices/pci0000:00/0000:00:1c.1/0000:03:00.0/net/wlp3s0

My wifi interface is wlp3s0

Configure /etc/network/interfaces:

allow-hotplug wlp3s0
iface wlp3s0 inet dhcp

check ifconfig. wlp3s0 should be there

Configure your network manager.

Links on Debian 9 Network Settings:

https://major.io/2015/08/21/understanding-systemds-predictable-network-device-names/

https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-configure-debian-9-network-settings/

https://blog.learningtree.com/new-names-linux-network-interfaces/

Code Notes 2019