"ultimate" backup choice

[David Fletcher]

On Sat, 2010-12-11 at 04:17 -0800, S Mathias wrote:
> i have:
> "SERVER A"
> "SERVER B"
> 
> with "full root permisson" [ssh, etc]
> 
> each server has a folder.
> 
> i want to backup a folder in "SERVER A".
> 
> are there any backup methods, that meets these two requirements? :
> 
> 
> 1) running from e.g.: a cronjob
> 
> 2) when running, it just checks the folder in "SERVER A" and "SERVER
> B". if a file/folder has been added/removed/modified in the "SERVER
> A"'s folder, then it copies/removes it/them to "SERVER B"'s folder.
> 
> please help!
> 
> Thank you in advance! [for any links, howtos :\ ]
> 
> have a nice weekend
> 
Sounds like you want a script something like this on your SERVERB (I
keep mine in /home/ but it's entirely up to you):-

#! /bin/bash


# server /home directory
# Make sure it's alive and kicking first!
if ping -c1 -w2 SERVERA </dev/null &>/dev/null
then
# In between then and fi is a single line
  sudo -u billg rsync -av --delete --bwlimit=3000
root at SERVERA:/home/ /home/billg/backups/server/copyofslashhome/
fi

with something like this line:-
41 *    * * *   root    /home/BackupServerWithCron
added to your /etc/crontab. Works for me.

You'll also need to add billg's public ssh key
to /root/.ssh/authorized_keys on SERVERA to get this to happen without
manually entering a password.

Dave