Quicktutorials [Fixes

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===== Quicktutorials =====

==== Get OS information ====
Get OS information from ''/etc/os-release''.

Example: Debian:
<code bash>
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/"
</code>

Import this to a bash script via:

The var ''ID'' is then ''debian'':
<code bash>
if [ -f /etc/os-release ]; then
  . /etc/os-release
  ID=$ID
fi
</code>

Or use ''neofetch'':
<code bash>neofetch</code>
//installed via: ''apt install neofetch''//

Sourced from: [[https://unix.stackexchange.com/questions/6345/how-can-i-get-distribution-name-and-version-number-in-a-simple-shell-script|stackexchange.org]]
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==== View CPU information ====

To view information about the CPU use
<code bash>cat /proc/cpuinfo</code>
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==== 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:
<code bash>dd if=/path/to/device of=image.img</code>

The ''/path/to/device'' can be found out with:
<code bash>lsblk</code>
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.

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==== 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:
<code bash>nmcli device wifi show-password</code>