Find Out What Shell I’m Using

Unix shells include Almquist shell (ash),Bourne shell (B shell, sh), C shell (csh), Bourne Again Shell (bash), Debian Almquist shell (dash), Korn shell (ksh), Public domain Korn shell (pdksh), MirBSD Korn shell (mksh), Z shell (zsh) etc. There are several ways to find out what shell we are using.

$ echo $0


$ ps -p $$
21002 pts/1 00:00:00 bash

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