topic Re: Synchronize 2 linux machines using rsync in Operating System - Linux

Synchronize 2 linux machines using rsync

'chris' — Fri, 25 Dec 2009 17:03:06 GMT

hi

I'd like to synchronize a directory included all subdirectories with user rights and permissions between 2 linux server using rsync.

Re: Synchronize 2 linux machines using rsync

Steven Schweda — Fri, 25 Dec 2009 18:33:36 GMT

You have my permission. What's stopping you?

Re: Synchronize 2 linux machines using rsync

'chris' — Fri, 25 Dec 2009 18:46:37 GMT

I mean UNIX (linux) directory and file permissions.
Normally u can change it using chmod command.

Re: Synchronize 2 linux machines using rsync

Steven Schweda — Fri, 25 Dec 2009 18:52:17 GMT

So, what's the problem? Is there something
unclear in the rsync documentation? Can you
find no rsync examples by searching the ITRC
forums? Is Google broken? Are you too tired
to read this stuff yourself?

Re: Synchronize 2 linux machines using rsync

Michal Kapalka (mikap) — Fri, 25 Dec 2009 19:18:51 GMT

hi chris,

check this link :

http://www.linuxquestions.org/linux/answers/Networking/Using_rsync_to_mirror_data_between_servers

hope it will help you.

mikap

Re: Synchronize 2 linux machines using rsync

'chris' — Fri, 25 Dec 2009 19:50:03 GMT

I've tried the following:

rsync -e ssh -avzp --delete-after /repl/ root@192.168.0.3:/repl/
root@192.168.0.3's password:

and hope it's OK.

BTW Howto set as a cron job using password?

Re: Synchronize 2 linux machines using rsync

Michal Kapalka (mikap) — Fri, 25 Dec 2009 19:57:20 GMT

BTW Howto set as a cron job using password?

#==========================================

what you mean ????

you like to make a cron job for this rsync password less ???

if yes you need to use password less ssh connection :

http://www.cyberciti.biz/faq/ssh-password-less-login-with-dsa-publickey-authentication/

mikap

Re: Synchronize 2 linux machines using rsync

'chris' — Sun, 27 Dec 2009 03:08:43 GMT

Thx, I've created password less SSH and setuped this command as a cron job:

rsync -e ssh -avzp --delete-after /repl/ root@192.168.0.3:/repl/

I hope this rsync command is OK to have an exact copy of my original directory, including permissions, ownership, modification times and so.

If not, pls correct me.

Re: Synchronize 2 linux machines using rsync

Michal Kapalka (mikap) — Sun, 27 Dec 2009 05:47:44 GMT

hi.

this command should work.

your - p switch should take care about permition :

-p, --perms
This option causes the receiving rsync to set the destination
permissions to be the same as the source permissions. (See also
the --chmod option for a way to modify what rsync considers to
be the source permissions.)

mikap

Re: Synchronize 2 linux machines using rsync

Steven Schweda — Sun, 27 Dec 2009 07:17:27 GMT

> I hope this rsync command is OK [...]

Have you considered running a test using some
small directory tree? You might even add or
change a file and see what happens.
Sometimes running a quick experiment can be
more reliable than either hope or someone
else's opinion. Often faster, too.

Re: Synchronize 2 linux machines using rsync

'chris' — Sun, 27 Dec 2009 13:25:12 GMT

THX

I've done a test and it seems to work well.

Re: Synchronize 2 linux machines using rsync

Steven E. Protter — Mon, 28 Dec 2009 16:21:46 GMT

Shalom Chris,

Might want to try this:

rsync -avH --stats --delete -e ssh /var/httpd/ $othernode:/var/httpd/

Othernode is the target host.

You can vary the directory source and target to your hearts content.

SEP

Re: Synchronize 2 linux machines using rsync

'chris' — Wed, 30 Dec 2009 18:25:59 GMT

Thx to ALL, but have a question:

rsync -e ssh -avzp ...

does it transfer each time all files or just differences?

BTW I need the same permissions on the target like on the source, that's the reason why I need -p option.

Re: Synchronize 2 linux machines using rsync

Steven Schweda — Wed, 30 Dec 2009 22:36:11 GMT

> does it transfer each time all files or
> just differences?

man rsync

http://samba.anu.edu.au/rsync/documentation.html
http://samba.anu.edu.au/rsync/FAQ.html

I quote:

If you think that rsync is copying too
many files, look at the itemized output
(-i) to see why rsync is doing the
update [...]