What is the best persistent backup application to use. This would be for USB external drive as the backup/restore drive.

Not much, PinguyOS is based on Ubuntu, works with mostly Ubuntu packages and should almost be identical as Ubuntu under the hood. But it is not developed or supported by Ubuntu. The main differences between PinguyOS and Ubuntu are PinguyOS uses a heavy tweaked GNOME3 desktop Installs by defaul...

Ubuntu One is displaying notifications about synchronising the same file(s) over and over and over again, although the file(s) ha(s/ve) not been changed. I see this notification every time I start the system or resume from standby, and even while running the session the notification appears irreg...