Creating a tar file and splitting it for storing it in cds, dvds or any other storage with small capacity.
Create a tarball and compress it using bz2 or gz compression algorithms by using one of the following commands.
tar -cvjf tarofsomefolder.tar.bz2 /home/someone/Documents/*
tar -cvzf tarfileofsomeiso.tar.gz some.iso
To split you can use the split command
split -b 4500M tarofsomefolder.tar.bz2 "tarofsomefolder.tar.bz2.part"
You can use both of them together in a single command by piping the outputs of the tar command to the split command,
tar -cvzf downloads.tar.bz2 ~/Downloads/* | split -b 4500M - "downloads-part"
To extract these split tar files together, you have to cat those individual tar files either by listing them one after the other or by using a regular expression that covers all of it and then piping the output to a tar extract command. Something like,
cat downloads.tar.bz2.part* | tar -xvzf -