Make split .rar files Ubuntu Linux

To compress file(s) to split rar archive know which directory you want to compress, I used /home as an example

rar a -m5 -v5M -R myarchive /home/

Let me break the above command down

rar - starts the program
a - tells program to add files to the archive
-m5 - determine the compression level (0-store (fast)...3-default...5-maximum(slow))
-v5M - determine the size of each file in split archive, in this example you get files with size 5MB (if you wanted files of 512kB size you would write -v512k)
myarchive - name of the archive you are creating
/home/ - is folder of the files you wish to add to the archive

More details;

www.ubuntu-unleashed.com/2008/05/howto-create-split-rar-files-in-ubuntu.html