Ubuntu/Linux Commands

Service
sudo service network-manager restart
Restart network manager (when wifi shuts off on idle)
Apt
sudo apt update
Update packages
sudo apt dist-upgrade
dist-upgrade is more complete than upgrade, because when dependencies change, those packages will be kept back with apt upgrade.
sudo apt autoremove
autoremove gets rid of those superfluous old linux kernels.
sudo apt clean
clean cleans out the package cache.
Terminal
tput reset
Clears terminal text