Performing Incremental backups using tar

- problem: W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn't be verified because…

[apt-get upgrade] warning: The following packages have been kept back: linux-headers-generic-lts-quantal linux-headers-virtual linux-image-generic-lts-quantal linux-image-virtual linux-virtual…

For example you want to rsync "/var/lib/mysql" from "/somefolder/var/lib/mysql", use the following syntax ( for local…