Burning Iso's to cd's or DVD's Ubuntu Linux
wodim -v -eject speed=8 dev='/dev/scd0' volume40.isoUbuntu Linux
cd's
wodim -v -eject speed=8 dev='/dev/scd0' debian-40r4a-i386-netinst.iso
wodim -v -eject speed=8 dev='/dev/scd0' ubuntu-8.10-desktop-i386.iso
dvd's
growisofs -dvd-compat -input-charset=ISO-8859-1 -Z /dev/scd0 -R -J -pad "/media/disk/wlsysdb.sql"
split -b 4000m bally_dave.24.09.08.tgz bally_dave.24.09.08.tgz
cat bigfile.gzac >> bigfile.gzaa
cat bigfile.gzad >> bigfile.gzaa
Some people prefer to first rename the original file (e.g., mv bigfile.gzaa to bigfile.gz) before starting the concatenations so that the file they are assembling has the intended name while it's being rebuilt. Others rename the file after the file has been rebuilt.
In my case, once bigfile.gzaa contained both chunks of the original file, I removed bigfile.gzab to recover the 4GB of disk space that it occupied and renamed bigfile.gzab to the more familiar form, bigfile.gz.