It is very useful to combine multiple PDF documents into one file. This is useful especially if you accumulate many PDFs (newsletters, bills, etc.) over time.
Check Disk Space Usage on Ubuntu
Computer disks have a finite capacity, and when they fill up it can lead to serious problems, including lost data and email. Actually it’s slightly more complicated than that; disks are divided into partitions, and the problems ensue when an important partition such as one containing user files fills up.
Clone Your Ubuntu installation
If you want to create a system that is similar to a different system you have already set up, it can be difficult to remember each and every package you had installed.This method works best when you are exporting to and importing from the same distribution and, specifically, the same releasefor example, exporting from Ubuntu Dapper to Ubuntu Dapper or ubuntu edgy to ubuntu edgy.
Install Sun Looking glass Desktop environment in Ubuntu
Sun Microsystems is contributing Project Looking Glass, based on Java™ technology, to the open source community.
Project Looking Glass is an exploratory project to bring innovative 3D features to the desktop environment. The desktop interface will offer an intuitive, new 3D environment to interact with desktop applications featuring window transparency, rotation, zoom, multiple desktop workspaces, and miniaturization. Project Looking Glass offers a platform to realize a far richer and more entertaining user experience for existing and new applications in 2D or 3D. The technology enables developers to build highly visual 3D desktops and applications that will run on Linux systems such as Sun’s Java Desktop System. The Solaris™ environment will be supported in the near future.