Lab rsync - 15 points: Practice with cron, tar and rsync



1. Each user will write a shell script that backs up a set of the users'
own files
into a tarball. The  files will be located in /home/[username] and /tmp.
The tarball will be written to the users home directory. Included in these
files will be several sub-directories and files.
Start this process by just practicing tar at the command line. When you delete 
some or all of these files you should be able to restore all of them into the
correct directories with a single command. Practice that, doing a restore
from a tarball without overwriting any existing files but having the desired
files written exactly back where they are supposed to be, without having to be
moved. You need to do this when you are restoring your server after a disaster,
your tarballs must write the files into the correct place.


2. Once your tar command works and it is in a shell script in your ~/bin
directory, create a cron job that does this every night and overwrites the 
existing tarball.


3. Each user will then create a cron job that uses the rsync utility to copy 
the tarball to your $HOME/hostname_backups on shaula. This cron job will run
once a week. Remember for this to work on shaula through a cron job, you must
have the proper authorized_keys in place to allow you to log from one machine to
the other without having to be there to type a password.