Users getting message "passwd: Authentication token manipulation error" when changing their passwords on Red Hat Enterprise Linux

Solution Verified - Updated -

Issue

  • Users not able to change password using passwd and getting error as "passwd: Authentication token manipulation error"
  • Some users are not able to change their own password:
# su - testuser
$ passwd 
Changing password for user testuser
Changing password for testuser

(current) UNIX password: 
passwd: Authentication token manipulation error 

I am trying to change a user password and neither root can perform this operation:

# passwd testuser
Changing password for user testuser.
passwd: Authentication token manipulation error

root can change passwords for local users. Newly added users can also change their password, however existing users can not change their passwords.

Environment

  • Red Hat Enterprise Linux
  • passwd / shadow

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