GNU Split: Examples and Reference

# GNU Split: Examples and Reference

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Split is a very useful tool included in most Linux distributions. It can be used to split large files into smaller parts according to a variety of parameters:

## Basic example

Default behaviour is to split file into parts containing 1000 lines

$split largefile.txt  ## Split file into chunks by number of lines For example, have each part have 1 thousand lines: $ split -l 1000 largefile.txt


## Split file into chunks by size (in bytes)

Each chunk will have at most the given size (the last chunk may be smaller).

For example, 10MB

$split largefile.txt -b 10MB  ## Split file into N equal-sized chunks (Each chunk will have totalSize / N size) For example, divide a large file into 10 parts This may split files halfway through a line $ split largefile.txt -n 10


## Split files into N equal-sized chunks without splitting lines

Use l/N where N is the number of parts you want. This will only split files at line endings.

For example, divide a large file into 10 parts, each having 1/10 of the lines:

$split largefile.txt -n l/10  ## Rebuild a file from its parts File parts start with x so use cat ./x* > rebuilt_file $ split largefile.txt
$ls xaa xab xac$ cat ./x* > rebuiltfile.txt