From HostThyself

duplicity is a tool that provides encrypted backup using rsync algorithm. This allows you to store backup in 3rd party space securely.

[edit] Setup duplicity in CentOS 5

Get latest rpm from http://download.savannah.gnu.org/releases-noredirect/duplicity/

Install duplicity

rpm -i duplicity-0.6.00-0.fdr.6.i386.rpm 

If dependency on librsync is required, get from ftp://download.fedora.redhat.com/pub/epel/5/i386/

Install librsync

[edit] Backup with duplicity

We will use scp to backup file to remote server

To set up a cron job to regularly backup the files, first setup a ssh public key in the remote server. See "How to set up a ssh key login" for details on how to do this.

Setup gpg

gpg --gen-key

Follows the prompt to generate the key. Default values works fine.

List the key

gpg --list-keys
/home/username/.gnupg/pubring.gpg
-----------------------------
pub   1024D/ABCD1234 2009-06-20
uid                  User Name <username@example.com>
sub   2048g/EFGH5678 2009-06-20

Note the key id ABCD1234 in this case.

Backup with duplicity

duplicity --encrypt-key  ABCD1234 /home/me scp://uname@other.host//usr/backup