There is simple syntax given below for splitting large file into several small size files.
Fire the following command from shell.
$ split –bytes=1m /path/to/large/file
You have done it. You can change the output file size by changing -bytes =1m to any desired value You can use b, k, or m. b represent bytes, k represent kilobytes, m represent megabytes.
To restore the original file you can use cat command.
cat prefix* > NEWFILENAME.