Shell

Movement

• ALT+F to jump Forward by a word.
• ALT+B to jump Backward by a word.
• CTRL+F to move forward by a char
• CTRL+B to move backward by a char
• CTRL+A to jump to start of the line
• CTRL+E to jump to end of the line
• CTRL+K to kill the line starting from the cursor position
• ALT+D to delete a word starting from the current cursor position
• CTRL+W to remove the word backwards from cursor position
• CTRL+R to reverse search for commands you typed in the past from your history.
• CTRL+S to forward search (works in ZSH for me but not bash)

ZSH

• Home | Zim: Modular, customizable, and blazing fast Zsh framework

Scripting

• To assign a variable, use = without space

• To use a variable, simply add $ before it

• set -x Show what’s executed

• set -e If the return code of one command is not 0 and the caller does not check it, the shell script will exit. This feature make shell script robust.

• $0 - Name of the script

• $1 to $9 - Arguments to the script. $1 is the first argument and so on.

• $@ - All the arguments

• $# - Number of arguments

• $? - Return code of the previous command

• $$ - Process identification number (PID) for the current script

• !! - Entire last command, including arguments. A common pattern is to execute a command only for it to fail due to missing permissions; you can quickly re-execute the command with sudo by doing sudo !!

• $_ - Last argument from the last command. If you are in an interactive shell, you can also quickly get this value by typing Esc followed by . or Alt+.

Links

• missing.csail.mit.edu
• Modern Linux Command
• SSH
• IO
• iTerm2