LinuxSysAdminsDoc/Linux/basic_cmd.md

# Theory

## Absolute path
cd /etc
## relative path
../../../etc
# Basic Linux Command

list current directory
> $ ls -l -a -r -t -h --help
ls = program
-l -a = parameters

Man for manual
> $ man ls

print working directory
> $ pwd

change directory
> $ cd 
back to precedent forlder
> $ cd -

Make directory
> $ mkdir test1 test2 test3

> $ mkdir -p lol/lol/lol   
-p to create parent directory if needed

Searching the PATH for executable files matching the names of the arguments
> $ which ls

Interactive processes viewer
> $ htop

# APT
> $ apt install
> $ apt remove
> $ apt autoremove
> $ apt update


## Display & Destop Manager

* Architecture:
> BIOS -> GRUB -> Display Manager -> Desktop Environement

* Install Desktop Environement (GUI)

> $ tasksel
> $ apt install gnome
> $ apt remove gnome

* Reconfigurer le display manager
> $ sudo dpkg-reconfigure gdm3

* Installer le display manager

> $ sudo apt install lightdm

> $ sudo apt install gdm3

* remove Desktop environement

> $ sudo apt remove lightdm 

# Services 
- HTOP
- dhclient > get ip
- gnome networkmanager 
- wpa_supplicant > encryption @ wifi