There are weird commas after the real-name parameter of some lines in my
What gives? Why are they there? Can I remove them?
Some tool you used to create the account (adduser?) added them. The tool in question sees the comment / real name field in the passwd file as a GECOS field:
The field values are
However, I cannot think of an applicaton which uses them. I believe these fields are close to useless. Use a different tool for adding users (useradd?) or explicitely give a value for the GECOS field if possible.