Table of Contents

Quicktutorials

Get OS information

Get OS information from /etc/os-release.

Example: Debian: 

PRETTY_NAME="Debian GNU/Linux 11 (bullseye)"
NAME="Debian GNU/Linux"
VERSION_ID="11"
VERSION="11 (bullseye)"
VERSION_CODENAME=bullseye
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"

Import this to a bash script via:

The var ID is then debian: 

if [ -f /etc/os-release ]; then
  . /etc/os-release
  ID=$ID
fi

Or use neofetch: 

neofetch

installed via: apt install neofetch

Sourced from: stackexchange.org

View CPU information

To view information about the CPU use 

cat /proc/cpuinfo

Create .img on Linux CLI

It's quite simple to create an image of a disk, for example an SD card, therefore use the following command: 

dd if=/path/to/device of=image.img

The /path/to/device can be found out with: 

lsblk

For example it can be /dev/sda. Remind that using this method will include also empty parts. An image of a 32 GB SD card will later have a size of 32 GB although for example 16 GB are unused.

Show WiFi password via CLI

Thereby that a system is required to save WiFi passwords in clear, it can also show those passwords to you. By running the following command (NetworkManager required), the SSID, password and a QR-code of the current connected WiFi will be displayed in your CLI: 

nmcli device wifi show-password