Open a new Terminal Session if not already in the command line.
Enter the following command. Replace UNAME with the name of the user.
id -u UNAME
This will output the User Id for the Username specified.
Open a new Terminal Session if not already in the command line.
Enter the following command. Replace UNAME with the name of the user.
id -u UNAME
This will output the User Id for the Username specified.