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how to set up rsync user to run a rsync script

Posted on 2016-07-14
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Last Modified: 2016-07-22
I have two application servers clustered behind a load balancer on aws. Both of them connect to a ldap server for authentication.

I have a rsync script to run on the second application server to sync the cache folder from the first server. I can run the rysnc script under root user without problem. But how can I add it to cron job to run it automatically. Do I need a special user to run it or I can run it under "root" user?

Also, I think I need implement keyless ssh authentication. How could I do it?

thanks.
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Question by:Jason Yu
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Tomas Helgi Johannsson earned 500 total points
ID: 41711355
Hi!

You can run a cron job under root user as well as any other user.
To create and edit a cronjob you simply issue
crontab -e 

Open in new window

to list the cronjob of a user the you simly issue
crontab -l 

Open in new window

See further examples here

To setup ssh keyless login look here

Regards,
    Tomas Helgi
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Author Comment

by:Jason Yu
ID: 41711495
I got the following error after I copied the id_rsa.pub key to the authorized_keys file on the remote host.


[root@magentoprod-apache1 .ssh]# rsync -a /var/www/html/var/cache/ root@10.104.1.24:/var/www/html/var/cache
Permission denied (publickey,gssapi-keyex,gssapi-with-mic).
rsync: connection unexpectedly closed (0 bytes received so far) [sender]
rsync error: unexplained error (code 255) at io.c(605) [sender=3.0.9]
[root@magentoprod-apache1 .ssh]# ls -alth
total 20K
drwx------. 2 root root   76 Jul 14 15:11 .
-rw-------  1 root root  953 Jul 14 15:11 authorized_keys
-rw-------  1 root root 1.7K Jul 14 15:06 id_rsa
-rw-r--r--  1 root root  406 Jul 14 15:06 id_rsa.pub
-rw-r--r--  1 root root  173 Jul 12 14:51 known_hosts
dr-xr-x---. 4 root root 4.0K Jun 23 10:03 ..
[root@magentoprod-apache1 .ssh]#
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