How to split a large file into parts? We’ll use rar.

$ sudo apt-get install rar

So we can split:

$ rar a -m0 -v350m myfile.rar myfile.avi

Where:

• a : we are adding
• -m0 : mode. 0 for no compression and fastest. 5 for high compression and slowest. 3 is default
  
• -v is the size of the volumes

Uncompressing is easy:

$ rar e myfile.part1.rar