Shell is a program that takes your commands from the keyboard and gives them to the operating system to perform. Some common types of shells are listed below:
> /bin/bash
> /bin/ksh
> /bin/csh
> /bin/sh
> /sbin/nologin
etc…
How/command to find out the current shell ?
# echo $SHELL
Example:
[root@localhost ~]# echo $SHELL
/bin/bash
Related Post:
How to change the shell for an already existing user
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