Linux & Ubuntu

Check Ubuntu Version

lsb_release -a

Get Infos about CPU

cat /proc/cpuinfo

Services

List enabled Services

systemctl list-unit-files --state=enabled

Package Management

Update the System

apt update       # Fetches the list of available updates
apt list --upgradable # see list of packages that can be upgraded
apt upgrade      # Installs some updates; does not remove packages
apt full-upgrade # Installs updates; may also remove some packages, if needed
apt autoremove   # Removes any old packages that are no longer needed

Get Info about a .deb File

dpkg -I <package_name>.deb

List Content of a .deb File

dpkg -c <package_name>.deb

List installed packages

apt list --installed

User Management

Create a User

useradd <username> -m -s /bin/bash
passwd <username>

Delete a User

User accounts can be deleted with the userdel command. The -r option specifies that the user’s home directory and mail spool should also be deleted.

userdel -r <username>

See also: https://wiki.archlinux.org/index.php/users_and_groups#Other_examples_of_user_management

Hardware

Get Info about GPU

lshw -C display