Change Shell To Bash

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How do I switch from a ksh shell to bash on Linux or Unix system? How to change shells on Unix-like system?

A shell is nothing but a command that provides a text-only user interface (also known as “command line interface”) for Linux, MacOS, and Unix-like operating systems. Bash shell read commands such as ls, date and others typed into a terminal and then run them. That is the primary function of bash shell.
How do I switch from an unknown shell to bash?

How do I fund out the default shell for a user?

Type the following command to find out the default shell for a user named vivek:
$ grep vivek /etc/passwd

$ ps -p $$
14314 pts/9 00:00:00 zsh

$ echo $0

All of the above output indicates that the shell is zsh.

How do I see what shells are available on my system?

Type the cat command as follows:
$ cat /etc/shells
Sample outputs:

Fig.01: How to find list of available shells on Linux or Unix or MacOS?
Fig.01: How to find list of available shells on Linux or Unix or MacOS?

How do I switch to a bash or different shell?

Type the name at the command line and then press the enter key. In this example, to change from any shell to the bash, type:

How to change shells on a Linux or Unix-like systems?

You can change your default shell using the chsh (“change shell” ) command as follows. The syntax is:
chsh -s {shell-name-here}
chsh -s {shell-name-here} {user-name-here}
chsh -s /bin/bash
chsh -s /bin/bash vivek

You can find full path to your shell using the following command:
type -a bash
type -a zsh
type -a ksh

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin and a trainer for the Linux operating system/Unix shell scripting. He has worked with global clients and in various industries, including IT, education, defense and space research, and the nonprofit sector. Follow him on Twitter, Facebook, Google+.

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