How to change user name in Linux
Sometime you may want to change the user login name into different one,
In that case you can use two options
(Login or switch to root mode – su)
Method 1: ( Using usermod command )
usermod -l newname oldname
Example
#usermod -l anthoniraj antony
Here the user antony has been changed to anthoniraj
Method 2 : ( Using chfn command )
chfn -f newname oldname
Example
#chfn -f thiraviam thiravi
Here the user thiravi has been changed to thiraviam
Note : The old user name should exists in /etc/passwd file .
These above two commands will only change the user name, not user home directory.