lxSplit is a simple tool for splitting files and joining the splitted files on unix-like platforms, such as Linux, FreeBSD, OpenBSD, etc. lxSplit splits and merges files with the -s and -j flags respectively. Starting with version 0.2.1, lxSplit can handle large files (>= 4 GB) both when splitting and joining. It can be installed from the ubuntu software centre. Usage: To split a big file into smaller pieces of 15 MB each, run the following command: lxsplit -s hugefile.bin 15M Output size can be given in (M)egabytes, (k)ilobytes and (b)ytes. To merge (join) the already split pieces into the original big file, run this command: lxsplit -j smallfiles.bin.001 All resulting files (from either splitting or joining) will be placed in the current directory. The official location of this document: http://lxsplit.sourceforge.net/