How do I find out what shell I'm using? in Categories CentOS, Debian Linux, FreeBSD, Gentoo Linux, Howto, Linux, Shell scripting, Sys admin, Ubuntu Linux, UNIX last updated November 15, 2005Asked by Chetan Joshi:Question: What is the best way to find out what shell I am using on Linux? The echo $SHELL is not so reliable. Please let me know any tiny command or trick.