Home / server / Questions / 154627
Accepted
Prashanth Sundaram
Asked: 2010-06-25 13:56:41 +0800 CST

bulk swap uidNumber/gidNumber?

  • 772

We currently have LDAP servers in Dev env. and staging/prod env. Both are not coupled and accounts are created manually. So the uids are same but the uidNumber and gidNumber are different across these two envs.

I am trying to upgrade to 389 DS and setup replication, so that users are sync'ed from Dev to staging/prod ldap servers without needing an admin. But doing that will involve changing the uidnum/gidnum but the userid will stay same. I wrote a script which gives me the list of users with conflicting uidnumbers and it says I have around 250 users like that. Sample:

amauer STG:2596 | DEV:2581  conflictID:aling
aling STG:2581 | DEV:2678  conflictID:blsow
bslow STG:2678 | DEV:2625  conflictID:krusso

As you can see amauer with staging uidNumber=2596 has 2581 in dev. If I go ahead and change it via script below, I would mess up files that belong to amauer when i do the same on aling user. As at that time, amour and aling will have same uidNumber. 

cat "$chownlist" | xargs -0 sudo chown $user
cat "$chgrplist" | xargs -0 sudo chown :$group
sudo rm "$chownlist" "$chgrplist"

Did anyone have similar problem while bulk changing file owner/group? Some kind of sorting mechanism which will come up with a list that

This project will give me 2-3hrs extra time every week and automation is OUR profession. :)

Any ideas??

Thanks

ldap user-management chown uid chgrp

2 Answers

  1. Try this as well to do the chown/chgrp in one step:

    find / -uid $OLDUID -exec chown $NEWUID '{}' +
find / -gid $OLDGID -exec chgrp $NEWGID '{}' +
    • 2
  2. Best Answer

    I have found one way of doing this but looks like it will only partially solve it. Number of conflicting users: 250 Number of hosts with homeDirs: 50

    seed for script.

    amauer:2670:1010:2082:1010
aling:2082:1010:2871:1010
bslow:2871:1010:2447:1010

    Script

        for i in `cat hosts.txt`; do
        for j in `cat uid-gid_seed.txt`; do
            user_id=`echo $j | cut -d: -f 1`
            old_uid=`echo $j | cut -d: -f 2`
            old_gid=`echo $j | cut -d: -f 3`
            new_uid=`echo $j | cut -d: -f 4`
            new_gid=`echo $j | cut -d: -f 5`
            echo "--------------------"
            echo $i
            echo
            ssh $i `sudo /usr/bin/find -path "/home/$user_id" -user $old_uid -exec chown $new_uid '{}'`;
    done;
   done
    • 0