When your Ubuntu Machine boots, you can see GRUB loading. please wait… Press Esc to enter the menu…
Backup and Restore Linux Partitions Using Partimage
Partition Image is a Linux/UNIX utility which saves partitions in many formats (see below) to an image file. The image file can be compressed in the GZIP/BZIP2 formats to save disk space, and split into multiple files to be copied on removable floppies (ZIP for example), … Partitions can be saved across the network since version 0.6.0.When using Partimage, the partitions must be unmounted.
Shows source-package information apt-show-source
This program parses the APT lists for source packages and the dpkg status file and then lists every package with a higher version number than the one installed.
Recursively lists package dependencies Using apt-rdepends
apt-rdepends searches through the APT cache to find package dependencies. apt-rdepends knows how to emulate the result of calling apt-cache with both depends and dotty options.