DSM-G600, DNS-3xx and NSA-220 Hack Forum

This could be a good option once I have rsync working as rsnapshot requires additional files such as perl and ssh, etc. However, the rsync script i posted provides the same kind of functionality as rsnapshot...

I just need some help on getting rsync working in the first place with the mounts, ssh, etc.

Thanks

James

Hello,

I use rsync myself to backup everything weekly from my Linux PC to the RAID1 DNS: rsync daemon runs on the DNS (from Fonz' fun_plug), and a script that performs rsync through the network is run through cron on the PC. No need for any mount or shared point is needed fir this.

You surely can do the same from one DNS to the other one.
   - to use cron, "crontab -l" prints the list, "crontab -e" edits the list. "man crontab" for how-to, you just have to add one line to your crontab to run your backup script.
   - rsync through network: you need to have the daemon running on the "backup" device" (fun_plug...), and use the IP@ of this device in the rsync command. Again, "man rsync" for how-to.

A nice thing with rsync is the "backup" option: rsync keeps a dated copy of your modifications, including deletions. Thus, if you remove a file by error, you can recover it from the backups, even after a long period. Very useful.... Belts and braces.... and parachute!

Actually, I don't use crontab on the DNS323, but on the PC (as I wrote). But crontab should work also on the DNS. What have you tried exactly? Do you have any error?

Hi dkl,

"man crontab" gives the error /mnt/HD_a2/fun.plug.d/bin/sh: man: not found

"crontab -l" seems to work... has three lines:
32 2 * * * /usr/sbin/rtc -s
30 2 2 * * /usr/sbin/rtc -c
59 1 * * * /usr/sbin/daylight&

"crontab -e" gives the same three lines, followed by a number of tildas, line after line.  I can't seem to add any new entries in anywhere.  After I run the command I just can't type anything...

I am using putty.

Thanks
Chumby

Hi dkl.. thanks for that.  I can get to the last ^M on the last entry but the cursor wont go down to the tilda.  Pressing i does get my into insert mode, but I still can't get to the start of a new tilda line.  Is there any good documentation on "vi".  Any other thoughts?

There's also joe, which should be easier to get started with.

Might have found the way... will try tonight...

From: http://www.mikerubel.org/computers/rsync_snapshots/

To run the rsync-with-backup command from the previous section every morning at 4:20 AM, for example, edit the root cron table: (as root)

crontab -e

Then add the following line:

20 4 * * * rsync -a --delete source/ destination/

Finally, save the file and exit. The backup will happen every morning at precisely 4:20 AM, and root will receive the output by email. Don't copy that example verbatim, though; you should use full path names (such as /usr/bin/rsync and /home/source/) to remove any ambiguity.

I suggest that you insert, in a shell script, the command for rsyncing your system. Maybe this script will have only one line, but this allows you to test it before moving to crontab. Moreover, if you intend to make modifications to your rsync function in the future, you just have to edit and save this script, without going back to "crontab stuff". Once you are sure your script is OK, just insert the call to this script in your crontab.
Example:
- /mnt/HDa2/backup.sh could be the name of your script. It should contain, at least one line which actually performs the rsync. Use absolute pathes. "which rsync" will give you the path to rsync.
- make the script executable: "chmod 755 /mnt/HDa2/backup.sh"
- check it works by running it
- once you are sure your script is OK, insert this line in the crontab: "20 4 * * * /mnt/HDa2/backup.sh"