Usernames containing uppercase letters on Redhat9

[arjun392]

Hi all,

Newbie question here. I recently installed redhat9 and have noticed that I cannot create usernames that contain uppercase letters.

So for example I can create tempuser but not TEMPUSER. I could however create such usernames on my older redhat 6.2 machine - which did indeed have usernames in all uppercase. The redhat9 machine is replacing the 6.2 one.

Is there a workaround ? I tried usermod and manually editing the etc/passwd file.

Any other ideas ?

Cheers,

[bryansmith]

Try useradd; here is the man page for it: http://www.die.net/doc/linux/man/man8/useradd.8.html

I usually add users with the following:

useradd -m -G [the groups you want] -s /bin/bash -c Bryan bryan

This will create the user bryan. After that, do

passwd bryan

to give them a password.

Bryan

[arjun392]

So, I figured this out and just wanted to let everyone know how/what I did.

What I wanted to do was create usernames in all capitals - like TEMPUSER.

adduser/useradd does not allow me to do that - it complains since the username contains all uppercase characters. They just let me create 'tempuser'. Which I did.

Here's how I fixed it:

I made /etc/shadow and /etc/gshadow writable by owner. Then in all 4 of the following files:

/etc/passwd
/etc/group
/etc/shadow
/etc/gshadow

I went in and manually changed every entry for tempuser to TEMPUSER. This includes the group entries as well (although I suspect I don't need to change the group entries for the username).

Once this was done I removed the write flag on shadow and gshadow and I was done.

I now have user TEMPUSER on the system acting like any other normally created user.

Regards,

Arjun