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26. Pipeline parameter substitution command xargs

2022-08-09 13:16:00 【51CTO】

Use is mentioned abovelocate命令及find命令查找文件,本文主要介绍xargsFunctions and command options;

1、备份配置文件,并添加bak这个扩展名

26、Pipeline parameter substitution commandxargs_html

26、Pipeline parameter substitution commandxargs_html_02

xargs The command is to readStandard input and data from pipesIt is used as an argument to other commands to make up for the lack of some commands that do not support piped data input,Generally used for pipes;如下所示：

26、Pipeline parameter substitution commandxargs_分隔符_03

       
       cat /etc/shadow | 
       
       echo
      
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       cat /etc/shadow | xargs 
       
       echo
       
使用xargs命令将cat /etc/shadow Normalized output is piped,xargsSupply these as arguments to 
      
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xargs选项：

-d 分隔符：Think by defaultxargs使用空白、tab、The carriage return is passed to the following command as a parameter separator,可以使用-d指定分隔符

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-p 交互式命令

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-n 表示将xargs生成的命令行参数,Pass several at a time to subsequent executions

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-0 表示以\0as a sub-payment,一般用于find命令,Cannot be used due to file namingNUM字符串,使用-0,Argument separation errors can be avoided

使用方式 find . -name "*.txt" -print0 | xargs -0 echo （-print0 Indicates that it is added after the result of the search\0而不是换行符）

-i 或者是-I,这得看linux支持了,将xargs的每项名称,一般是一行一行赋值给 {},可以用 {} 代替

-P 修改最大的进程数,默认是1,为0时候为as many as it can

       
       seq 
       
       100 |xargs 
       
       -i 
       
       -P10 
       
       wget 
       
       -P /data http://www.baidu.com/image{}.html
       
并发执行10个进程,http://www.baidu.com/image1.html——http://www.baidu.com/image10.html每次10个
      
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