[clug] Username

Bryan Kilgallin bryan at netspeed.com.au
Mon Sep 19 17:42:43 UTC 2016

I received a hand-me-down laptop. Set up with a simple and guessable 
username. So now I want to replace the latter.

I recall that passwords were supposed to be strange. Is such applicable 
to usernames as well?

I wanted an idea of rules and conventions. So I found the following. 
What's that about starting lowercase? And I read somewhere else that `.' 
was forbidden.

{([a-z_][a-z0-9_]{0,30}) reads as "a lowercase or underscore, followed 
by zero to thirty alphanumeric characters", meaning the total length of 
the username can be 31 characters.}


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