Bash Command Line Pro Tips

by Jason Cannon

enable it globally by uncommenting the the appropriate lines in /etc/bash.bashrc.

Your previous working directory is stored in an environment variable named $OLDPWD.

run another command against the last item on the previous command line. To access that item in your current command, use "!$".

!$

Surrounding a command with backticks is the older style and is being replaced by the dollar sign syntax.

$(date +%F)

$ sudo cp usb_modeswitch.conf !#:2.bak

usb_modeswitch.conf usb_modeswitch.conf.bak

$ echo "alias grpe='grep'" >> ~/.bash_profile

alias ct='column -t'

alias d='date +%F'

alias ls='ls --color=auto'

alias grep='grep --color=auto'

alias tree='tree -C'

alias utc='TZ=UTC date'