In this tutorial, How do I use the rev command used to reverse the character of the line in Linux? Linux the essential for DevOps Roles. Now, let’s rev command in Linux.
The “rev” command in Linux is a utility that is used to reverse the order of characters in each line of a file or standard input. It is particularly useful for reversing the contents of a file or reversing the output of another command.
The syntax rev command in Linux
rev [option] [file...]Some common options for the “rev” command include:
-V: Displays the version information for the command.-h: Shows the help information.-c: Treats input as single characters instead of entire lines.
On the man page, the describes it
- rev – reverse lines characterwise.
- man rev – More details information about rev command.
For example
Using the rev command reverses the output of the hostname command as below
[root@ip-10-0-0-236 ~]# hostname
ip-10-0-0-236.us-east-2.compute.internal
[root@ip-10-0-0-236 ~]# hostname | rev
lanretni.etupmoc.2-tsae-su.632-0-0-01-pi
[root@ip-10-0-0-236 ~]#
How to get 8 last characters use the combine rev command and cut command 🙂
[root@ip-10-0-0-236 ~]# hostname
ip-10-0-0-236.us-east-2.compute.internal
[root@ip-10-0-0-236 ~]# hostname | rev | cut -b 1-8 | rev
internalSorting File Lines by Last Character
[ec2-user@ip-172-31-45-95 ~]$ cat domain.txt
devopsroles.com
abc.xyz
huuphan.com
[ec2-user@ip-172-31-45-95 ~]$ cat domain.txt | rev | sort | rev
huuphan.com
devopsroles.com
abc.xyzConclusion
Through the article, you can use rev command examples in Linux as above. Please note that the “rev” command does not modify the original file; it only displays the reversed output on the terminal or redirects it to another file.
I hope will this your helpful. rev Command – Reverse Order of Characters on Command-Line. Thank you for reading the DevopsRoles page!
