Bug 89205 - Unable to handle '.' in usernames (name.lastname)
Summary: Unable to handle '.' in usernames (name.lastname)
Status: CLOSED DUPLICATE of bug 115383
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: shadow-utils
Version: 9
Hardware: athlon
OS: Linux
Target Milestone: ---
Assignee: Nalin Dahyabhai
QA Contact:
: 80462 88358 88877 100565 104179 108614 (view as bug list)
Depends On:
TreeView+ depends on / blocked
Reported: 2003-04-20 20:32 UTC by Josh Algdal
Modified: 2007-04-18 16:53 UTC (History)
14 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2006-02-21 18:52:45 UTC

Attachments (Terms of Use)
Patch to allow period ('.') in usernames (502 bytes, patch)
2003-08-25 15:46 UTC, del
no flags Details | Diff

Description Josh Algdal 2003-04-20 20:32:46 UTC
From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)

Description of problem:
adduser is unable to handle the the character '.' in usernames, example 
name.lastname, even though it works very well when usernames like that is 
entered in /etc/passwd.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
Type 'adduser red.hat' and hit enter.

Actual Results:  adduser: invalid user name 'red.hat'

Expected Results:  The username should be added.

Comment 1 hephaestus 2003-05-16 11:57:20 UTC
I too have experienced this bug (which is a major pain in the butt). In my case
it is a fresh installation (I have heard that this problem does not occur with

Does anyone have a workaround?  - Aside from editting the passwd file to change
the username manually, that it.

Comment 2 hephaestus 2003-05-19 14:02:47 UTC
The bug does not affect the command "newusers" so users can be created in batch
mode without problems.

In what is probably the most tedious workaround in history, an individual user
can be created directly from the keyboard using the following syntax:

echo 'username:password:::comment:homedirectory:defaultshell' | newusers

Comment 3 del 2003-08-25 15:46:21 UTC
Created attachment 93907 [details]
Patch to allow period ('.') in usernames

Comment 4 Milan Kerslager 2003-10-23 03:54:30 UTC
*** Bug 104179 has been marked as a duplicate of this bug. ***

Comment 5 Milan Kerslager 2003-10-23 03:56:59 UTC
*** Bug 88358 has been marked as a duplicate of this bug. ***

Comment 6 Milan Kerslager 2003-10-23 04:01:36 UTC
*** Bug 80462 has been marked as a duplicate of this bug. ***

Comment 7 Milan Kerslager 2003-10-23 04:18:35 UTC
The patch from comment #3 works. I made RPM package
shadow-utils-4.0.3-6.1.9.i386.rpm, you can grab it here:


I see no reason to not allow dots in usernames. I see no application that do not
allow usernames longer than 8 characters or dots in usernames since RH 6.0 or so.

Please accept this patch to be backward compatible with Red Hat Linux and allow
users to utilize glibc and other new tools. We are not living at 60's or 70's.

Comment 8 John Cummings 2003-10-30 18:25:40 UTC
*** Bug 108614 has been marked as a duplicate of this bug. ***

Comment 9 Jose de Leon 2004-01-30 05:34:42 UTC
I have this same problem, except my problem is serious.  I have 
thousands of users on RH7.3 with dots in usernames and I'm planning 
to migrate them as soon as possible.  Renaming these users is just 
not feasible.

Comment 10 B.R. 2004-02-03 02:19:11 UTC
Just got hit with this one myself.  Way too many dot'ed users out
there to even consider removing the dots from all user accounts!  I
like the patch submitted, but it doesn't allow usernames that *begin*
with a dot.  I've no need for usernames beginning with a dot myself,
but if anyone out there does, please speak up now.  IMHO, this patch
should make it to release as soon as possible so folks can press
forward with upgrading their 7.x and 8.x boxes.

Comment 11 Rishi Gangoly 2004-02-03 04:06:52 UTC
Or better yet... switch to Debian. Knoppix is pretty good. Once you 
get used to Debian, you won't switch to another GNU/Linux 
distro. ;-) 
BTW I tried creating a user starting with a dot and it allowed me to 
do so. However, if I try to login using the 'su' command it says: 
su: User not known to the underlying authentication module 
And when I login from the console it says: Login incorrect 
So I guess this is a problem with something else and not shadow 
utils. ;-) 

Comment 12 Miloslav Trmac 2004-02-07 17:31:24 UTC
*** Bug 88877 has been marked as a duplicate of this bug. ***

Comment 13 Miloslav Trmac 2004-02-07 17:31:43 UTC
*** Bug 100565 has been marked as a duplicate of this bug. ***

Comment 14 Onno van der Leun 2004-02-12 09:11:09 UTC
The RPM from comment #7 worked on our RH9 servers ... but we also 
have the same problem on Fedora CORE 1 ... and on that the RPM won't 
install because Fedora uses a newer version ...

Can someone help me to make the ' . ' issue work on Fedora?!
Since i haven't yet found a solutions for Fedora yet ..

Thank you!

Comment 15 Milan Kerslager 2004-02-16 17:19:09 UTC
As RH 9 is near of end-of-life, I'm marking as duplicate of new bug
related to RHEL3 (Red Hat Enterprise Linux).

I have patched version for RHEL3, see the bug #115383.

*** This bug has been marked as a duplicate of 115383 ***

Comment 16 Red Hat Bugzilla 2006-02-21 18:52:45 UTC
Changed to 'CLOSED' state since 'RESOLVED' has been deprecated.

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