How do I check my bash version?

How do I find the version of bash I am running?

To find my bash version, run any one of the following command:

1. Get the version of bash I am running, type: echo "${BASH_VERSION}"
2. Check my bash version on Linux by running: bash --version
3. To display bash shell version press Ctrl+x Ctrl+v

Check my bash version using ${BASH_VERSION} shell variable

Type echo command or printf command:

echo "BASH_VERSION"
printf "%s\n" $BASH_VERSION

Find bash shell version using the --version option

Just pass the --version to the bash command to show version information for this instance of bash shell on the screen and exit successfully:

bash --version
echo $?

How to check Bash version

Display version information about the current instance of bash using keyboard shortcut

Just press CTRL + x followed by CTRL + v and you should see something as follows on screen:

GNU bash, version 4.4.19(1)-release (x86_64-pc-linux-gnu)

Use package manger to find out bash version

Use the dnf command on a Fedora Linux and yum command on a CentOS/RHEL to get version info about bash package:
$ yum info bash

How to check bash version on a CentOS Linux using yum command

How to check Bash version on Debian or Ubuntu Linux

Debian/Ubuntu Linux user try the apt command or apt-cache command or dpkg command as follows:
$ apt info bash
OR
$ apt-cache show bash

How to get bash version number using a package manager

ash-5.0.18_3
Name           : bash
Version        : 5.0.18_3
Installed on   : Sat Jan  2 22:50:30 2021 IST
Origin         : shells/bash
Architecture   : FreeBSD:12:amd64
Prefix         : /usr/local
Categories     : shells
Licenses       : GPLv3+
Maintainer     : ehaupt@FreeBSD.org
WWW            : https://www.gnu.org/software/bash/
Comment        : GNU Project's Bourne Again SHell
Options        :
	DOCS           : on
	FDESCFS        : off
	HELP           : on
	NLS            : on
	PORTS_READLINE : on
	STATIC         : off
	SYSBASHRC      : off
	SYSLOG         : off
Shared Libs required:
	libhistory.so.8
	libreadline.so.8
	libintl.so.8
Annotations    :
	FreeBSD_version: 1201000
	cpe            : cpe:2.3:a:gnu:bash:5.0.18:::::freebsd12:x64:3
	repo_type      : binary
	repository     : FreeBSD
Flat size      : 8.48MiB
Description    :
This is GNU Bash.  Bash is the GNU Project's Bourne Again SHell,
a complete implementation of the POSIX.2 shell spec, but also
with interactive command line editing, job control on architectures
that support it, csh-like features such as history substitution and
brace expansion, and a slew of other features.

WWW: https://www.gnu.org/software/bash/
root@nixcraft-m6700:~ # 

Conclusion

This page showed you various commands on how to check bash version on your Linux or Unix-like operating system.