Less known but useful Commmands Redo last command but as root sudo !! Open an Editor, write a bash command (and execute in shell) ctrl+x+e Create superfast Ramdisk mkdir -p /mnt/ramm mount -t tmpfs tmpfs /mnt/ram -o size=8192M fix a really long command (that you messed up) fc quickly create folders mkdir -p folder/{sub1,sub2}/{sub1,sub2,sub3} exit terminal but leave all processes running disown -a && exit