- Splitting and Joining multiple files with lxsplit

lxSplit is a simple tool for splitting files and joining the spitted files on UNIX-like platforms, such as Linux, FreeBSD, OpenBSD, etc. It is fully compatible with the HJSplit utility which is available for other operating systems. Splitting is done without compression.

Installation:
OpenSuSe user can install lxSplit using "1-click" installer - here

Using lxSplit:
lxSplit splits and merges files with the -s and -j flags respectively.

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.

Note: Same thing can be done using 'split'  (to split the files) and 'cat' command (to join the files) -- here

source:http://linuxpoison.blogspot.com/2010/05/135781677517257.html