ubuntu.md

Ubuntu

Package manager

sudo apt-get update # update repos
sudo apt-get upgrade # upgrade installed packages
sudo apt-get dist-upgrade # upgrade system dist

Disk and RAM

df # disk space
df -h # disk space human readable
df -hT /dev/xvda1 # disk space human readable for specific disk

free -m # show free RAM
free -mh # show free RAM human readable

Copy ssh key to server

ssh-copy-id user@server

Handy commands

cd - # switch between the two last dirs
cd # shorthand for cd to home dir ~
ls -lah # human readable list

history # shows all entries from bash history
history | grep pwd # search for command in bash history
!48 # will re-run command nr 48 from history

lsb_release -a # show system info
lsb_release -h # show system info help

uname --help # show system info help
uname -a # show all system info
uname -r # show kernel version
uname -i # bit version

ps # list any running processes
ps -aux # list system processes
top # real time processes
sudo apt-get install -y htop # graphical top command

sudo -i # login as root user if you need to cd into folders that require root permission