Re: pure number allowed as username in the useradd command?
On 12/02/2010 07:42 PM, Marko Vojinovic wrote:
On Thursday 02 December 2010 21:02:17 Aaron Konstam wrote:
> On Thu, 2010-12-02 at 18:10 +0100, Joachim Backes wrote:
>> Can somebody explain why pure numbers are allowed for username in the
>> useradd command?
>>
>> sudo useradd 123456789
>>
>> is not rejected!
>>
>> As is known, this leads to big problems if referring to such a user and
>> the username differs from the userid: should such a username be
>> interpreted as username or userid?
Can you be specific - what big problems are these ? Never tried, but
it is by means obvious that this would be problematic.
So I guess 12345 should be a valid username as any other, and useradd
correctly allows for creation of such usernames. No bug there.
Agreed - without knowing what the problems are it is hard to say that
useradd (or anything else) should disallow numerical id's ..