Linux Learning 134 Unit6

Tag: Linux file keyword software

UNIT6 basic commands commonly used in Linux

1.diff comparison of two different files

diff-u file file.new >file.path # #生成补丁文件

Yum Install patch-y # #安装打补丁工具

Patch - b file File.path # #给老软件打补丁, clear and backup old software

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2.grep # #过滤字符

- I. # #或略大小写

- N # #显示结果所在行的行号

- C # #结果个数

- v # #反向过滤

- r keyword Catalogue # #在目录中过滤还有关键字的文件

- E "keyword 1| keyword 2| ..." # #过滤多个关键字

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Patch Command patch

Patches take the patch file Patchfile (which contains a list of differences generated by diff) and

the differences apply to one or more original files that generate a patch version. Typically , a patched version replaces the original

start file , but when you specify the-B option, you can make a backup. will use the. orig file name suffix

Rename original file

Patches can be used to apply a simple patch file to a single file using the following syntax

–[[email protected] etc]# patch issue Patchfile

Patching file Issue

The following command shows how to use a patch file created through Diff-naur. User changes to

after a comparable directory similar to the original directory from which the patch file was created , a patch is executed

–[[email protected] orig-dir]$ Patch-b </tmp/patchfile

Patching file hosts

Patching file Network

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Cut command

Cut is used for text fields or columns in the cut file and

It is displayed to the standard output

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3.sort # #排序

- N # #纯数字

- R # #倒序

- u # #去掉重复行

- T # #指定分隔符

- k # #指定排序的列

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4.uniq # #处理重复行

- C # #统计重复行的个数

- u # #显示唯一的行

- D # #显示重复行

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5.tr # #转换字符大小写

TR ' A-Z ' A-Z <file # #把file中所有小写字符转换成大写

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6.sed # #控制流输出

sed ' s/nologin/westos/g ' passwd # #替换输出中的nologin为westos

Sed ' 1,5s/nologin/westos/g ' passwd &nbs

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Linux Learning 134 Unit6