On 07/06/12 18:09, Joachim Backes wrote:
On 06/07/2012 04:35 PM, Ed Greshko wrote:
On 06/07/2012 08:20 PM, Erik P. Olsen wrote:
On 07/06/12 01:27, Ed Greshko wrote:
On 06/07/2012 05:26 AM, Erik P. Olsen wrote:
I have a number of F14 partitions which must be mounted unchanged on the new F16
system. It turns out that I get unexpected permission problems with this approach.
I use the same user name on both systems but on F14 I got userID 500 whereas on F16
it became 1000. I wasn't aware of that but learned it the hard way. When I chowned
the permissions to 1000:1000 it worked on F16 but now not on F14.
What is the proper way to fix this problem? I am tempted to reinstall F16 and force
my userID to 500, but the system warns me not to create userIDs< 1000. It is not
feasible to clone the partitions due to space constrains so I am not able to have
identical partitions with different permissions.
The "proper" way to fix this is to do it on the F14 system.
Change your password entry to have uid:gid of 1000:1000. Make the change to the
group file to change it to 1000 as well.
Then, go to all the top of all partitions/directories owned by 500 and chown -R
1000:1000. In other words, make all the changes on the F14 side.
I had to go through this process when I installed F16 since my RHELv4 system had me
as 500:500 and I NFS mount my directories from there. Just took 5 or so minutes.
Reinstalls are never needed to change a user's gid/uid.
I thought of this at the very beginning but I never found out how to change userID
from 500 to 1000. Please explain how to do that.
OK.... Let's say that your user name on the F14 system is olsen.....
The entry in /etc/passwd is probably
olsen:x:500:500:Erik olsen:/home/olsen:/bin/bash
and /etc/group is probably
olsen:x:500:
Just change those to...
olsen:x:1000:1000:Erik olsen:/home/olsen:/bin/bash
and
olsen:x:1000:
Why not use the commands "usermod" and "groupmod"? According to the
usermod man page, usermod will modify the ownership of almost all user's
files (but not of the files outside of the user's home dir).
And then....
chown -R 1000:1000 /home/olsen
along with any other directories or file systems that were previously owned by uid
500 gid 500.
That's all...
Oh, this is much more than I anticipated when I planned to move from F14 to F16.
And it is not just my userID it is also all the other userIDs on the system.
/home/someone is not the biggest problem but there are lots of directories/files
all over that have to inspected. I wish there were conditional chown so that it
would only change userID to 1000 if it was exactly 500.
Sigh.
--
Erik
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