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<TITLE>The Answer Guy 36:
Eight Character login Name Limit
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<H4>"The Linux Gazette...<I>making Linux just a little more fun!</I>"</H4>
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<H4>By James T. Dennis,
<a href="mailto:answerguy@ssc.com">answerguy@ssc.com</a><BR>
Starshine Technical Services,
<A HREF="http://www.starshine.org/">http://www.starshine.org/</A>
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<H3 align="left"><img src="../../gx/dennis/qbubble.gif" height="50" width="60"
alt="(?) " border="0">
Eight Character login Name Limit
</H3>
<p><strong>From CHOSICA on Fri, 04 Dec 1998
</strong></p>
<!-- ::
Eight Character login Name Limit
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
:: -->
<BLOCKQUOTE>
</BLOCKQUOTE>
<P><STRONG><IMG SRC="../../gx/dennis/qbub.gif" ALT="(?)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
My name is Felix. I am new using linux. I just saw your web pages
after making a search on altavista. I have set up my mail server
on Linux 2.0.29 and I am only able to create accounts with a
maximun of 8 character. I was trying to create an account call
<A HREF="mailto:webmaster@myname.com">webmaster@myname.com</A> and it does not make it . The server only
creates accounts with 8 character or less than 8 characters. Do
you know a way to increase the characters, so I can create account
with 9 or 10 characters. There should be a way I do not know how?
If you can help me I would really appreciate. Thanks in advance.
</STRONG></P>
<P><STRONG>
Felix
</STRONG></P>
<P><STRONG>
</STRONG></P>
<BLOCKQUOTE><IMG SRC="../../gx/dennis/bbub.gif" alt="(!)"
HEIGHT="28" WIDTH="50" BORDER="0"
>
This is a common limitation in many versions of Unix.
It is determined by the libraries (primarily 'libc' the
set of libraries that are compiled into virtually all
Unix programs).
</BLOCKQUOTE>
<BLOCKQUOTE>
Using glibc 2.x (a.k.a. Linux libc 6) it is possible to
create longer login names (up to 31 characters). So, you
could just install a newer copy of <A HREF="http://www.redhat.com/">Red Hat</A>, Mandrake,
<A HREF="http://www.debian.org/">Debian</A> or any other glibc based Linux distribution.
</BLOCKQUOTE>
<BLOCKQUOTE>
However, you should consider the issue carefully before
using this feature. You'll want to ensure that <EM>all</EM> of
your binaries are able to cope with the longer login
names. Also if there's any chance that you'll want or
have to share account information across multiple versions
of Unix it's a bad idea to take this chance. (I think that
newer versions of Solaris and HP-UX support longer login
names as well. I don't know about AIX, SCO ODT, or any
others).
</BLOCKQUOTE>
<BLOCKQUOTE>
I'd suggest using the name: 'webman' or 'www' for
your "webmaster" or "web manager" account. You can easily
configure your mail system to route mail addressed to
"webmaster" to 'webman' (just us an aliase) and you can
even configure your 'sendmail' to re-write outgoing mail
from 'webman' such that it appears to come from "webmaster"
(that would be in the generics, virtuser, or userdb
FEATURES() in your sendmail .mc file).
</BLOCKQUOTE>
<BLOCKQUOTE>
So, if the only reason you want the long name is for
e-mail addressing --- just use a short name and let the
MTA (mail transport agent) do the work.
</BLOCKQUOTE>
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<H5 align="center"><a href="http://www.linuxgazette.com/ssc.copying.html"
>Copyright ©</a> 1999, James T. Dennis
<BR>Published in <I>The Linux Gazette</I> Issue 36 January 1999</H5>
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