General

Table of Contents Overview Versions, etc.. Startup Folder Processes Logon Quotas

Overview

RTFM :

• CLI:
  • man COMMAND_NAME
    
  • examples only
  • examples only, with votes
• web:
  • fulltext
  • graphics

Versions, etc..

List:

• kernel: uname -r
• distribution: lsb_release -a
• file manager xdg-mime query default inode/directory

Startup

On startup, system:

• mount all elements in /etc/fstab (except those with noauto option);
• start services with autostart option
• start some applications, previously set up using:
  • UI: use gnome-session-properties ;
  • CLI: create a autostart (.desktop) file in ~/.config/autostart folder.

Sample of autostart file for Keepass : keepassxc.desktop file :

[Desktop Entry]
Type=Application
Exec=/usr/bin/keepassxc
Hidden=false
NoDisplay=false
X-GNOME-Autostart-enabled=true
Name[en_US]=Keepass
Name=Keepass
Comment[en_US]=Password manager
Comment=Password manager

Folder

Overview:

• list last 5 modified files ls -ltr | tail -5
• get total size of files in directory matching pattern du -csh *temp* | tail -1 | cut -f 1
• use config file for ls

get size (`du` stands for `disk usage`): `du --summarize --human-readable $DIRECTORY`

Processes

Identify the binary location of a command
which COMMAND_NAME

Logon

User initialization scripts:

• main : ~/.bash_profile
• main in Ubuntu: ’~/.profile`
• system-wide environment variables /etc/environment
• all: echo exit | strace bash -li |& less | grep '^open'
  

Quotas

ulimit