So, who is this nobody user anyway? Port ... / 2009-07-02

So, who is this nobody user anyway? Porting account-management scripts from Centos linux to ubuntu made strange problems show. A short check found interesting differences. After asking around on irc and trying some things I found quite a choice:
Centos linux:

nobody:x:99:99:Nobody:/:/sbin/nologin
nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin

Ubuntu linux:

nobody:x:65534:65534:nobody:/nonexistent:/bin/sh

FreeBSD 6.1:

nobody:*:65534:65534:Unprivileged user:/nonexistent:/usr/sbin/nologin

Solaris:

nobody:x:60001:60001:Nobody:/:

Interesting is that creating a file as root on a solaris nfs client will create it as 65534:0. Data Ontap:

pw_name = nobody
pw_passwd = 
pw_uid = 65535, pw_gid = 65535