Hi
I have two boxes Bodhidarmar -> server and backup (as backup_server) , I am
trying to backup the /var/log/ folder from the server on to the backup
machine. What I found is while trying to restore the files from the backup
machine to the server rsync is changing the owner. I am not sure why this
happens even when I use the -a switch while using rsync.
*man pages of rsync*
rsync -*a*vz foo:src/bar /data/tmp
This would recursively transfer all files from the directory
src/bar on the machine foo into the /data/tmp/bar
directory on the local machine. The files are transferred in
"archive" mode, which ensures that symbolic links,
devices, attributes, permissions, *ownerships*, etc. are preserved
in the transfer. Additionally, compression will
be used to reduce the size of data portions of the transfer.
For example let us consider just auth.log
*Step1:* Here I show that auth.log has syslog and adm as owner and group.
root at Bodhidarmar:~/.ssh# ls -ltrh /var/log/auth.log
-rw-r----- 1 syslog adm 147K 2012-11-17 06:25 /var/log/auth.log
*Step2:* I am trying to backup just auth.log
backup at bala-desktop:/backup$ ls
backup at bala-desktop:/backup$ rsync -avz -e 'ssh -i
/home/backup/.ssh/backup' root at bodhidarmar:/var/log/auth.log /backup/
receiving incremental file list
auth.log
sent 30 bytes received 9501 bytes 6354.00 bytes/sec
total size is 150330 speedup is 15.77
backup at backup:/backup$ ls -ltrh
total 148K
-rw-r----- 1 sebackup adm 147K 2012-11-16 19:55 auth.log
sebackup at backup:/backup$
*Step3:* I am deleting the auth.log on my server, so that I can restore it
from the backup which I just created.
root at Bodhidarmar:~/.ssh# rm /var/log/auth.log
*Step4: *I am restoring the auth.log
backup at backup:/backup$ rsync -avz -e 'ssh -i /home/backup/.ssh/backup'
/backup/auth.log root at bodhidarmar:/var/log/
sending incremental file list
auth.log
sent 9499 bytes received 31 bytes 6353.33 bytes/sec
total size is 150330 speedup is 15.77
backup at backup:/backup$
*Step5: *Here you can see that it is assigned to aravind instead of syslog
root at Bodhidarmar:~/.ssh# ls -ltrh /var/log/auth.log
-rw-r----- 1 *aravind* adm 147K 2012-11-17 06:25 /var/log/auth.log
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Regards,
Balasubramaniam Natarajan
www.blog.etutorshop.com
