Unalias an Alias

Sometimes I want to iterate on an alias. You can unalias an alias like this:

unalias aliasname

This is particularly useful when changing an alias to a function. When you change this:

alias up="cd .."

To this:

up() {
  # Alternative implementation
}

And source your config, you’ll likely see this (Zsh example):

.zshrc: defining function based on alias `up'
.zshrc: parse error near `()'

Unaliasing is an elegant path forward.