How do I delete a shell function?

问题

I have done this:

$ z() { echo 'hello world'; }

How do I get rid of it?

回答1:

unset -f z

Will unset the function named z. A couple people have answered with:

unset z

but if you have a function and a variable named z only the variable will be unset, not the function.

来源：https://stackoverflow.com/questions/245406/how-do-i-delete-a-shell-function