[CentOS] Determine next UID number

[Les Mikesell]

On 10/13/2010 5:24 PM, Stephen Harris wrote:
> On Wed, Oct 13, 2010 at 04:47:45PM -0400, John Kennedy wrote:
>> the next user even though some dim bulb gave a use a UID of 4294967294 (how
>> the hell that user can log in with a UID out of range is beyond me unless it
>> gets truncated)...
>
> Who says 4294967294 is out of range?
>
>    # grep tstuser /etc/passwd
>    tstuser:x:4294967294:10::/:/bin/bash
>    # su - tstuser
>    -bash-3.2$ id -a
>    uid=4294967294(tstuser) gid=10(wheel) groups=10(wheel)
>    -bash-3.2$ touch /tmp/x0
>    -bash-3.2$ stat /tmp/x0
>      File: `/tmp/x0'
>      Size: 0               Blocks: 0          IO Block: 4096   regular empty file
>    Device: 806h/2054d      Inode: 196620      Links: 1
>    Access: (0644/-rw-r--r--)  Uid: (4294967294/ tstuser)   Gid: (   10/   wheel)
>    Access: 2010-10-13 18:15:28.000000000 -0400
>    Modify: 2010-10-13 18:15:28.000000000 -0400
>    Change: 2010-10-13 18:15:28.000000000 -0400
>
> Looks good to me!  The file just created has an ownership with the right
> uid.

64-bit, I presume?  Does your /var/log/lastlog look pretty big after 
that person logs in or did that get fixed?

-- 
   Les Mikesell
    lesmikesell at gmail.com