Split can be used to split files into multiple files, making them easier to email or transfer. To split a file with the name of krypted into 100MB files, use the following command: split -b100m ~/Desktop/krypted krypted The files will then be called krypteda, kryptedb, kryptedc. To put Humpty Dumpty back together again use the cat command and > them into one file: cat krypteda kryptedb kryptedc > krypted