Others may find this useful; in getting prepared to migrate to fds, I had
to first address the issue that the same users have different uid's and
gid's on our servers (for example, Johnny may be uid 500 on server A, but
may have uid of 501 on server b); as such, I put togeather this script
that will change a user's uid, gid, as well as change ownership of files
and folders to their new uid and gid;
#!/bin/bash
#this script expects user to pass an argument for user to process
pass1=$1
new_uid=$2
new_gid=$3
#check to see if user entered anything
if [ ! $# == 3 ] ; then
echo "Usage is pass me 3 parameters, user to change, new uid to use, and
new gid to use exiting"
exit
fi
#parse /etc/passwd and /etc/group for groups to change
myname=`cat /etc/passwd | grep -w $pass1 |awk -F: '{ print $1 }'`
myuid=`cat /etc/passwd | grep -w $pass1 |awk -F: '{ print $3 }'`
mygid1=`cat /etc/passwd | grep -w $pass1 |awk -F: '{ print $4 }'`
mygid=`cat /etc/group | grep -w $pass1 |awk -F: '{ print $3 }'`
#check and make sure the user's primary group is also their private group
if [ ! $mygid1 == $mygid ] ; then
echo "There is a mismatch between the user's primary group and their
private group"
echo "I'm exiting as their primary group is likely a shared group and
should be fixed"
exit
fi
echo "User to change is $myname with uid of $myuid and gid of $mygid and
assign user new uid of $new_uid and new gid of $new_gid"
echo "Do you want me to continue? [y/n]"
read lastchance
case "$lastchance" in
y)
echo "I'm going to continue with user, group and file system changes"
#change private group id
/usr/sbin/groupmod -g $new_gid $myname
/usr/sbin/usermod $myname -g $myname
#change uid
/usr/sbin/usermod -u $new_uid $myname
#find files they use to own and give them ownership again
my_ufind=`find / -uid $myuid`
my_gfind=`find / -gid $mygid`
for i in $my_ufind
do
chown $myname $i
done
for m in $my_gfind
do
chgrp $myname $m
done
;;
n)
echo "I'm aborting all changes"
exit
;;
*)
echo "You entered something I don't understand...aborting"
exit
;;
esac
