apt-get -y install unison openssh-server ssh nano ssh-keygen -t dsa ssh-copy-id -i $HOME/.ssh/id_dsa.pub root@192.168.0.101 # ssh-copy-id -i $HOME/.ssh/id_dsa.pub root@192.168.0.101 root@server2:/home/administrator# cat $HOME/.ssh/authorized_keys # run interactively unison /var/www ssh://192.168.0.101//var/www # run batch configuration nano /root/.unison/default.prf # Roots of the synchronization root = /var/www root = ssh://192.168.0.101//var/www ## we can run Unison without any arguments: unison ## syncronize every 5 minutes crontab -e */5 * * * * /usr/bin/unison &> /dev/null ## test syncronization echo "Test 1" > /var/www/test.txt ## should appear on server 2 ## now test new file on server2