Using tar, to make differential Backup on Hard Disk
 

Hi

I am new member of Linux Family. I have been assigned the task to implement system in Red Hat Linux 9.0 as Backup server.
This Server also contains users data on Raid implemented ATA/100 Drives.

I would like to find the way how would I create the backup of data on Raid Implemented HDD on another Drive.

Case I - Differential Backup
I had find the way by using tar command but didn't get success. I used

$ tar czf /home/user1 >user1.tar

I used this but I didn't know How would I get differential backup.

Case II - Automating the back up process on Daily basis
I had used the "crontab" settings but I failed
I had add following statement in /etc/crontab as

...
30 17 * * * /bin/tar cvzf /user1.tar /home/user1

Please any one could help me out.

Hi!

Firstly you've completely gotten the syntax wrong...

it's tar option archive-filename files-to-be-archieved
I suggest reading the man and info pages.


Cheers,
Tink

Thnx Tinkster

I am looking for way how would i create backups of shared data on HardDisk.
And How i schedule it for incremental and differential backups on daily and weekly basis.

Please help me out

Assuming GNU tools:
You can use "tar -d" to list differences (apperently), and you can also use something like "find -newer <last backup tarfile>"

If you just want backups, why not use existing software?

• http://www.bacula.org/
• http://www.dirvish.org/
• http://www.nongnu.org/duplicity/
• http://www.nongnu.org/rdiff-backup/
• http://sourceforge.net/projects/flexbackup/
• http://www.zmanda.com/amanda-community-edition.html