How to split a large file in Linux using split command

At times, very large files need to be split into smaller fragments and then re-assembled. To split a file, open a terminal window in Linux and enter the following command:
$ split -b 1000K largefile <enter>

where:
largefile is the file to be split.
1000K means you want to split the file with each chunk of size 1000K.

Once you have run the above command, you will see smaller files named xaa, xab, xac and so on. These are the splits. You can then delete largefile.

You can re-assemble the file using the command below:
$ cat xaa xab > largefile <enter>

The above method can be used to backup very large files on multiple devices or even to copy smaller files to a cloud storage service like Google Drive, OneDrive, Copy.com, Dropbox.