Linux / UNIX: Create Username or Groups in UPPER Case

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Q. How do I create username or user groups in upper case under Linux / *BSD / UNIX operating systems?

You can create username and groups in upper case but I don’t recommend it for following problems:
(a) Confusion – Some user may get confused with username VIVEK and vivek.

(b) Compatibility issues – Many protocols and certain libraries may produced compatibility issues.

The use of upper case letters for usernames or group names should be avoided under Linux / UNIX like operating systems.

Posted by: Vivek Gite

The author is the creator of nixCraft and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.

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  1. can be done by upgrading the package shadow-utils, after that you will be able to add the username with upper/lower characters

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