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ssh
Extending Screens
You can add another computer’s monitor to your host’s screen and control it using your keyboard and mouse as if it was an extra monitor. It can come in handy when working on 2 computers as you can control both with the same of keyboard and mouse.
user@host:portspecify the host to add to your screen.-eastselect which direction from your current monitors the new one will be added
ssh -YC user@host:port x2x -east -to :0.0
git
Bare Repositories
Turning off untracked files for git status for bare repositories.
git config status.showUntrackedFiles off
sort
Print out unique lines of the file in descending order.
sort -u file
awk
Print the first column (separated by :) from /etc/passwd.
awk -F: '{print $1}' /etc/passwd
Print the first column (separated by :) from /etc/passwd where the 3rd column is
1000.
awk -F: '$3=="1000" {print $1}' /etc/passwd
date
Convert dates between different formats.
The example converts it to the Unix Epoch format that can be used to compare different dates.
date -d "12:30" +%s
cmatrix
Send any output (like cmatrix) to the TTY screen.
User needs to be logged in on the TTY and not have a Graphical environment running. Best done over SSH on servers.
Might need sudo to be executed.
cmatrix > /dev/tty2