User ID
 

In my redhat v3 system , it do not allow to create the userid which is block letter ( ABC ) , but it is strange that I have another Redhat v3 system , it allow to do it , can advise how to let the userid with block letter ? thx


useradd -g xxx -d /home/xxx/ABC ABC

useradd: invalid user name 'ABC'

That's... strange. You should be able to do that.

Are you running the command as the root user? Could you cut and paste (literally - don't type it out) from a terminal session where you enter that command with a real gid?

John G

Hi,

Officially this is the legal template for a username:

[a-z_][a-z0-9_-]*

Adduser (useradd) and shadow are kinda sensitive to this.

But that does not explain why one RH3 system allows capitals and the other RH3 system does not.