How to Split Files with the Split command in Linux

Split is a useful Linux command used to split files into chunks of various sizes. The Split command is a straight forward utility all you do is specify the target size of each chunk in bytes (-b) followed by the name of the file to be split.

split -b 200m -d ubuntu-12.04.2-server-amd64.iso

The 657MB Ubuntu ISO was split into four chunks. Notice the incremental numbering.

x00  x01  x02  x03

To join all the files back together we use another utility, cat will look for all files starting with X*, regroup them, and output the results in to the file ubuntu-12.04.2-server-amd64.iso.

cat x* > ubuntu-12.04.2-server-amd64.iso

Split is a simple utility that can split files of any size into more manageable chunks. I regularly use split when I am forced to download files over unreliable connections and with no possibility of transfering with Rsync.