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This article mainly introduces how to use split to cut files and merge files under Linux, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.

Split uses split: you can split a large file into many small files, and sometimes you need to split the file into smaller fragments, such as generating logs to improve readability

Syntax: split (option) (file) PREFIX

Options:

-b: the value is the size of each output file, in byte.

-C: the maximum number of byte per line in each output file.

-d: use numbers as suffixes.

-l: the value is the number of columns per output file.

PREFIX: stands for the leading character and can be used as the leading file of the cutting file.

Example:

1) there is an 11m logs that needs to be cut into 1m files

Split-b 1m logs

2) the file is divided into multiple suffix files with letters. If you want to use a numeric suffix, you can use the-d parameter, and you can use-a length to specify the suffix length:

Split-b 1m logs-d-a 2

3) specify the prefix of the file name for the split file:

Split-b 1m logs-d-a 2 file_split

4) use the-l option to split the file according to the number of lines of the file, for example, to split the file into small files containing 100 lines each

Split-l 100 logs

5) after the file is cut and moved to the corresponding directory, you need to merge the file to get the original file (PS: verify md5 for transferring files)

Cat x * > log diff-r log logs

No output after diff, indicating that the two files are consistent

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