zsh

CLI

Dry run a script

zsh -n / --no-exec $script

Print commands and arguments as they are executed

• For a script

  zsh -x $script > $log_file 2>&1

• For the current shell

  zsh -xl > $log_file 2>&1

  Can be used to source the value of an environment variable

alias

• Linuxhint - How to configure and use aliases in ZSH (opens in a new tab)

oh-my-zsh

• Update: omz update
• Reload zsh: omz reload
• GitHub - ohmyzsh/ohmyzsh - Wiki - Cheatsheet (opens in a new tab)

Modules

zsh/zle (opens in a new tab)

• Shortcuts

  • Alt + L

    ls

• Resources

  • A Guide to the Zsh Line Editor with Examples (opens in a new tab)

Builtins

Builtins manual page

• man zshbuiltins

• Resources

  • zsh: 17 Shell Builtin Commands (opens in a new tab)

autoload

• autoload tells zsh to look for a file in $FPATH/$fpath containing a function definition, instead of a file in $PATH/$path containing an executable script or binary.

• Example

  • Make autoload directory

    • mkdir -p "$HOME/.zsh/autoload" .

      Create a new directory where you want.

  • Add the created directory to $FPATH

    • export FPATH="$HOME/.zsh/autoload/:$FPATH"

  • Add a script file in autoload directory

    • echo "echo hello zsh autoload" > "$HOME/.zsh/autoload/hello-zsh-autoload"

      • File name is command name.
      • No need for excutable permission
      • No need to define function in file

  • Add new command by autoload

    • autoload -U hello-zsh-autoload

  • Now you can hit new command

    $ hello-zsh-autoload
     
    > hello zsh autoload

• Resources

  • zsh: 9.1 Autoloading Functions (opens in a new tab)

compdef

hook functions

chpwd

• Execute the specified command whenever the current working directory is changed.

• Add a hook

  • add-zsh-hook chpwd <command>

• Remove a hook

  • add-zsh-hook -d chpwd <command>