Large file segmentation and merging of Linux commands

The split command of Linux is a good choice when faced with slicing a large file. It contains a number of parameters that support slicing by row and size.

The syntax for the split command is as follows:

Split [--help][--version][-a][-b][-c][-l] [file to be cut] [output filename prefix]

The corresponding parameters are described as follows:

-A,    suffix length used by--suffix-length=n (default is 2)-B,--bytes=size    byte size per output file-C,--line-bytes=size    The maximum byte size per line for each output file-D,--numeric-suffixes    uses a numeric suffix instead of the letter suffix-l,--lines=number    sets the number of rows per output file--help Display Help information--version    Display version Information

Here are a few examples:

1) Split the file splitTest.txt into multiple files, each file size is 10M. Command:

$ split-b 20m splittest.txt$ lssplitTest.txt  xaa  xab  xac

2) split the file splitTest.txt into multiple files, each file size is 10M. Specify the split file prefix bit split, command:

$ split-b 20m splitTest.txt  split$ lssplitaa  splitab  splitac  splitTest.txt

3) Split the file splitTest.txt into multiple files, 500,000 lines per file. Command:

$ wc-l splitTest.txt 1502216 splittest.txt$ split-l 500000 splitTest.txt  split$ lssplitaa  splitab  splitac< C7/>splitad  SplitTest.txt

4) Split the file splitTest.txt into multiple files, 500,000 lines per file. Specifies that the split file suffix is a number, the number of digits is 3 bits, and the command:

$ wc-l splitTest.txt 1502216 splittest.txt$ split-l 500000-d-a 3 splitTest.txt  split$ lssplit000  split001
   split002  split003  splitTest.txt

You can use the Cat command to merge the sliced files into a new file:

$ cat split0* > Original.txt

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