| Move Your /home to Another Computer|
Posted: 16 Mar 2005
Having bought a new machine, I was looking for a cool program to migrate my
user settings from my old box to the new one. I needed something that would keep
all my tweaks to KDE, my Evolution email, and my GAIM settings. A simple thought
from a Linux-savvy friend of mine brought me to the realization, "Hey! I don't
need a special program to do this!"
If you need to back up your settings or migrate them to a new machine, this
tutorial will help. My aim is to explain a quick, painless method of doing
For this exercise, 'old machine' refers to the computer that has the current
user data on it. This is the machine whose data you are going to back up.
Conversely, 'new machine' refers to the machine to which you are going to move
and restore your data.
First, log out of your window manager, and go back to your login manager. In
KDE, you can do this by clicking on the K Menu, and clicking LOGOUT. Click END
CURRENT SESSION from the window that appears. You are then taken back to your
login screen. In Gnome, click on the SYSTEM menu, then the LOGOUT [username]
option. In the window that comes up, select the LOGOUT radio button, and click
You should now be back at your LOGIN window. What we need to do now is invoke
one of your command-line terminals. Press CTRL+ALT+F1. You should never, ever
log in as root. However, because we cannot have our user logged into the system,
at this time, we are going to log in as root:
Welcome to SuSE Linux 9.2 (i586) - Kernel 2.6.8-24.11-kefault (tty1).
linux login: root
Last login: Fri Mar 11 09:28:24 on tty1
Have a lot of fun...
At this point, it might be a good idea to make sure no other users than root
are logged in. Type in 'who' and press ENTER:
linux:~ # who
root tty1 Mar 14 14:45
You should only see the 'root' user logged in. If other users are logged in
here (especially the user whose data you are working with), the process will
abort and throw errors at you.
Go to your /home directory:
linux:~ # cd /home
Next, create a gzipped tar archive of your home directory. Mine is called
'smorris', so that's what I'll use. Replace 'smorris' in the example with your
linux:/home # tar -cjf home.tar.gz smorris
List the directory's contents to see your archive:
linux:/home # ls -lh
drwxr-xr-x 5 root root 136 Mar 14 14:55 .
drwxr-xr-x 27 root root 632 Mar 14 11:39 ..
-rw-r--r-- 1 root root 49M Mar 14 14:55 home.tar.gz
drwxr-xr-x 30 smorris users 1.5K Mar 14 11:42 smorris
You now have a gzipped tar archive of your home directory. This archive will
have most (if not all) of your preferences for the applications you have
installed. It will probably have all of your email messages in it. IM chat logs
can also be found in the archive. There are two things you can do from here. You
can put it on a CD as a backup of personal data. Alternatively, you can copy it
to another machine and unarchive it, restoring to that machine all of your
preferences. It is the latter option that we will execute here.
Go over to the new machine to which you are going to copy the archive. On
this machine, I will assume that you already have created a user with the same
name as on the other machine. For example, my username is 'smorris'. I have this
user on the old machine that I am backing up. I also have created this user on
the new machine where I am restoring the backup. Log in as root (normally, this
is not good practice, but is necessary here). You might want to do this in the
same manner as you did with the old machine, above. Once you are logged in, make
sure there is an ssh daemon running. To do this, open a terminal window. At the
command prompt, type 'ps aux | grep sshd' and then press ENTER:
linux:/home # ps aux | grep sshd
root 4191 0.0 0.4 5144 2068 ? Ss 12:30 0:00 /usr/sbin/sshd
root 6154 0.0 0.1 2604 704 pts/2 S+ 16:21 0:00 grep sshd
Look at the first line of the output. Over towards the right, you see
'/usr/bin/sshd'. This is our ssh daemon.
If you do not see this, you'll want to run it. To run the ssh daemon, type
'/etc/init.d/sshd start' and press ENTER:
linux:/home # /etc/init.d/sshd start
Starting SSH daemon done
You should see the ssh daemon starting up as in the above example.
Once you're sure the ssh daemon is running, we're ready to copy the file to
the new machine. For this step, you will need to know the IP address of the new
machine. Still at the new machine, type '/sbin/ifconfig' and press ENTER:
linux:/home # /sbin/ifconfig
eth0 Link encap:Ethernet HWaddr 00:0C:6E:6C:66:62
inet addr:220.127.116.11 Bcast:18.104.22.168 Mask:255.255.252.0
inet6 addr: fe80::20c:6eff:fe6c:6662/64 Scope:Link
UP BROADCAST NOTRAILERS RUNNING MULTICAST MTU:1500 Metric:1
RX packets:168221 errors:0 dropped:0 overruns:0 frame:0
TX packets:21408 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:35849611 (34.1 Mb) TX bytes:2336595 (2.2 Mb)
Interrupt:5 Base address:0x4000
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:111 errors:0 dropped:0 overruns:0 frame:0
TX packets:111 errors:0 dropped:0 overruns:0 carrier:0
RX bytes:11519 (11.2 Kb) TX bytes:11519 (11.2 Kb)
There are two sections, 'eth0' and 'lo'. Completely disregard the 'lo'
section. In the 'eth0' section, the second line starts with 'inet addr:' and has
the IP address immediately after it. In my case, it is 22.214.171.124.
Go over to the old machine (the one with the home.tar.gz backup on it). You
should still be at a terminal.
On this machine, initiate the file transfer. Type 'scp home.tar.gz
email@example.com:' and press ENTER. Remember to replace the IP in this example
with the IP of your new machine. Note the trailing colon. It is required:
linux:/home # scp home.tar.gz firstname.lastname@example.org:
The authenticity of host '126.96.36.199 (188.8.131.52)' can't be established.
RSA key fingerprint is bd:8c:a0:98:e5:0f:22:74:27:fb:b0:cb:ef:c7:6e:4f.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '184.108.40.206' (RSA) to the list of known hosts.
home.tar.gz 100% 49MB 12.2MB/s 00:04
Now, head back over to the new machine. Move the archive from the /root
directory to the /home directory, and then go to that directory:
linux:~ # mv /root/home.tar.gz /home
linux:~ # cd /home
Before we go any further, let's just make sure noone else is logged into the
linux:/home # who
root tty1 Mar 14 14:45
The 'root' user should be the only one logged in.
Next, let's rename the folder that already exists for the user. That way, we
can restore it later if something goes awry:
linux:/home # mv smorris smorris.1
Now, unarchive the file:
linux:/home # tar -xjvf /home.tar.gz
You'll see a ton of stuff scroll up the screen.
When it finishes, you have restored your user's settings to that
Once again, let's just make sure you have a user account that uses that
directory as their home directory. You can check this by running the following
command. Remember to replace 'smorris' with your username:
linux:/home # cat /etc/passwd|grep smorris
You can see that there is a user 'smorris' that uses '/home/smorris' as its
Now, you can reboot the machine (type 'shutdown -r now' and press ENTER).
When your machine reboots and the login manager comes back up, log in as your
user (not root). When you run applications, they should already have all of the
preferences and settings that you had on your old system. Some programs will
even have items in the 'most recently used' menus that you had open on your old
If you want a quick and dirty way to make backups, this will do it. If you
want to migrate your user data, preferences, settings, email, etc., from one
computer to another, this will get it done. In any case, this is a nice tool for