How to use Linux large file split split and merge Cat

This article mainly introduces two Linux commands: Split and Cat. Among them, I believe that everyone is familiar with the cat command, generally used to view the contents of a file, but it also other functions, such as the introduction of the file merge function, it can combine multiple file contents into a file. From the split word meaning does not take understanding, it is the meaning of division, often used to split large files. This is detailed below.

Split command-split file

Syntax: Split [–help][–version][-][-l][-b][-c][-d][-a][file to be cut] [output FILENAME]

–version displaying version information

– OR-L, specify how many lines are cut once for text file segmentation

-b Specifies the size of the cut file, in units m or K

-C is similar to-B but maintains the integrity of each row as much as possible

-d use numbers instead of letters as suffix names

-a specifies the length of the suffix name, which defaults to 2 bits

Example 1

Cut the a.tar.gz package by each 5M size:

Split-b 5m a.tar.gz a.tar.gz.

The file name that is output later: "A.tar.gz.", the words that are not specified are output in xaa,xab,xac form. If the file name is not appended. , the output file name is linked to the suffix and is not intuitive.

Example 2

Use the ' | ' Pipeline to merge packaged split actions:

tar-zcf-a | Split-b 5m-a.tar.gz.

Note: Before and after the pipe two without parameters "-" is not omitted, he as the tar ouput and split input parameters.

Cat command

Syntax: Cat [-ABEENSTTUV] [help] [–version] FileName

-N or –number the number of rows for all outputs starting from 1

-B or –number-nonblank and-n similar, except for blank lines not numbered

-S or –squeeze-blank when you encounter a blank line that has more than two consecutive lines, replace the blank line with one line

-V or –show-nonprinting

#cat常用功能
#一次显示整个文件
Cat filename

#创建一个文件, only new files can be created and existing files cannot be edited
Cat > FileName

#将几个文件合并为一个文件.
Cat File1 file2 > File

So the above example merges the split file, which you can use:

#合并
Cat a.tar.gz.* > A.tar.gz
#合并并解压
Cat a.tar.gz.* | Tar-zxv

The above excerpt from: http://www.ezencart.com/pages/1001.html

How to use Linux large file split split and merge Cat