The split command under Linux (a large file is divided into small files on average by the number of rows) __linux

Divide a large file into several small file methods

For example, a BLM.txt file is divided into 1000 small files prefixed with blm_, and the suffix is a coefficient form, and the suffix is a 4-digit number form

First Use

Wc-l BLM.txt read out the BLM.txt file a total number of lines

and use the split command.

Split-l 2482. /blm/blm.txt-d-a 4 blm_

Divide file BLM.txt into small files, 2482 rows per file (-l 2482), file prefix blm_, coefficients not letters but numbers (-d), suffix coefficients four digits (-a 4)

Linux file segmentation can be achieved by the split command, you can specify by row number segmentation and Ann size split two modes. Linux file merge can be implemented by Cat command, very simple.

File segmentation with split under Linux:

Mode One: Specifies the number of rows after the split file

For a txt text file, you can split the file by specifying the number of rows after the split file.

Command: Split-l large_file.txt new_file_prefix

　　

Mode two: Specify File size after split

Split-b 10m Server.log Waynelog

We can also separate files by file size for binary files.

File merging with cat under Linux:

Command: Cat small_files* > Large_file

Enter the contents of the a.txt to the end of the B.txt

Cat A.txt >> B.txt