How to change 'echo $SHELL' to '\bin\zsh' on MacOS-CodePudding

I have recently upgraded from Catlina to Big Sur and changed shell to zsh but when I echo $SHELL it still shows /bin/bash how do I change this

CodePudding user response：

I would either put a

SHELL==zsh

SHELL=$0:a

into your ~/.zshenv (the difference between these two forms is explained below). This has several advantages:

This file is only processed by zsh, interactive and non-interactive, so there is no risk that this setting is picked up by a different shell.
By setting it as a shell variable and not an environment variable, child processes written in different shells (bash, ksh, sh, ...) can set the SHELL variable by themselves, if they like.
By using the form =zsh, zsh expands the word zsh to the full path of the shell. This assumes that zsh is in your PATH, which is reasonable anyway.
If you decide to go for the alternatie form, $0:a, instead of =zsh, you are assigning to SHELL the path of the current zsh. This makes a difference, if you have several zsh versions installed on your system, and want to make sure that SHELL is set to the one which is currently running.