How to change the userid or Login name in Linux

Q. How do I change the userid or Login name in Linux?

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A. Use usermod command which modifies the system account files to reflect the changes that are specified on the command line.

You need to pass -l option as follows to usermod command:
usermod –l NEW_LOGIN_NAME old_login_name

Where,

  • -l : The name of the user will be changed from old_login_name to NEW_LOGIN_NAME. Nothing else is changed. In particular, the users home directory name should probably be changed to reflect the new login name.
  • NEW_LOGIN_NAME : New Login name/user-id
  • old_login_name : Old login name/user-id

An example

For example, change the userid vivek to new id called sradmin. You need to type the following command:
# usermod -l sradmin vivek

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