Editing ISGEC - Samba Migration

You need to backup all of the above files and directories from old server to new Linux server.

Commands to type on old Linux system

 First create a tar ball of old uses (old Linux system). Create a directory:
 # mkdir /root/move/

 Setup UID filter limit:
 # export UGIDLIMIT=500

 Now copy /etc/passwd accounts to /root/move/passwd.mig using awk to filter out system account (i.e. only copy user accounts)
 # awk -v LIMIT=$UGIDLIMIT -F: '($3>=LIMIT) && ($3!=65534)' /etc/passwd > /root/move/passwd.mig

 Copy /etc/group file:Commands to type on new Linux system

 First, make a backup of current users and passwords:
 # mkdir /root/newsusers.bak
 # cp /etc/passwd /etc/shadow /etc/group /etc/gshadow /root/newsusers.bak

 Now restore passwd and other files in /etc/
 # cd /path/to/location
 # cat passwd.mig >> /etc/passwd
 # cat group.mig >> /etc/group
 # cat shadow.mig >> /etc/shadow
 # /bin/cp gshadow.mig /etc/gshadow

Please note that you must use >> (append) and not > (create) shell redirection.

 Now copy and extract home.tar.gz to new server /home
 # cd /
 # tar -zxvf /path/to/location/home.tar.gz

Now copy and extract mail.tar.gz (Mails) to new server /var/spool/mail
 # cd /
 # tar -zxvf /path/to/location/mail.tar.gz

Now reboot system; when the Linux comes back, your user accounts will work as they did before on old system:
 # reboot
 # awk -v LIMIT=$UGIDLIMIT -F: '($3>=LIMIT) && ($3!=65534)' /etc/group > /root/move/group.mig

 Copy /etc/shadow file:
 # awk -v LIMIT=$UGIDLIMIT -F: '($3>=LIMIT) && ($3!=65534) {print $1}' /etc/passwd | tee - |egrep -f - /etc/shadow > /root/move/shadow.mig

 Copy /etc/gshadow (rarely used):
 # cp /etc/gshadow /root/move/gshadow.mig

 Make a backup of /home and /var/spool/mail dirs:
 # tar -zcvpf /root/move/home.tar.gz /home
 # tar -zcvpf /root/move/mail.tar.gz /var/spool/mail


scp -r /root/move/* user@new.linuxserver.com:/path/to/location