Hello,

I currently have 2 backup methods in place on my 2 servers.

Backup my web content (/srv) using s3sync to Amazon S3 weekly (This includes sqldump before sync starts)

I am signed up to linodes backup service on both services for fast restoration in event of failure

I wish to create a 3rd backup which would sync all folders on the server so in event of the complete outage of Linodes services, I could restore elsewhere or to another data centre.

My questions are:

Which folders should I backup. All/Some?

To restore, would I just install a default copy of Ubuntu 10.04 in Linode or other system, then overwrite the folders from my back up the server and it would work exactly the same as before?

Thanks!

It sort of depends on where you have useful information stored and what you're running. You might want to look at the following.

/etc: configuration files
/home: user files
/var/spool/mail: stored mail
/var/spool/{cron,at}: user crontabs and at jobs
other stuff in /var/spool/: other application state files
/var/lib/mysql: MySQL databases (probably not needed if you're doing dumps)
other stuff in /var/lib/: other application state files
/srv or /var/www: web files

Start by enumerating what all services you run, then track down where they keep their data.