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Saving work and exiting
Linux Live CD
The work in /home/ubuntu is all in RAM. When the computer is switched off, it will all disappear. To keep the work, it must be copied to a permanent medium like the USB drive. The easiest way to do this is to make an archive and move it to the USB drive.
$ cd /home/ubuntu $ ls $ tar cf fred.tar pharosc_8.4 $ mv fred.tar /media/disk
This creates the archive fred.tar and moves it to the USB drive. The archive can have any name, although it is conventional to use the suffix tar.
The archive can be compressed with the gzip utility.
$ gzip fred.tar
which will create the file fred.tar.gz.