Shell

12. Sort commands for Rowssort:1. Sort command-line options: Options Describe -T Separators between fields -F Ignore case when sorting based on character -K Define

Seven. grep family: 1. grep exit Status: 0: Indicates success; 1: Indicates that a matching pattern could not be found in the supplied file; 2: Indicates that the file provided in the parameter does not exist. See the example below: /> grep '

Common commands· LS View the files in the current directory· CD into a directory· CD-Jump back to previous directory· CD ~ Enter the current user's personal directory· PWD Output Current path· mkdir new Folder· Touch New File· Find File· ln

#!/bin/bash##!/bin/bash#read-p ' input number ' C #指定抽取的学生人 Number of jw= (' Wang Hao ' Shei Yunsheng ' ke Yang ' He Shingyu ' Repeti soldier ' Dengbellin ' ' Liu Dao ' ' Yang Jidong ' Chu Ziwen ' ' ' Salted fish ' ' Yang Dong ' > Huang Tinghui '

1, test-f file 2, [-F file] 3, [[-F file]][-F file1-a-F file2] logic with [-f file1-o-F file2] logic or [-f file1] && [-f file2] the same as a string operation best double quotes such as-n-z = = = And a space is added to both sides of the equals

The shell file containsThe shell can also contain external scripts in the following syntax format:. FileNameOrSOURCE filenameFor example, create a two shell script.Script 1:test1.sh url = "Www.baidu.com" Script 2:test2.sh .

The problem has been a long time, and has not been sorted out. Remember the last interview when asked how to bulk modify the host name of 1000 machines. Here is a file named 1.txt that is created in bulk for hello.First, install the expectYum

Declare declaring variable type declare [+/-] [option] Variable name-: Set the type attribute to the variable +: cancels the Type property of the variable-A: Declaring variables as arrays-I: declaring variables as integers-x: Declaring a variable as

Diffdiff file File1 to compare two different files-C display rows around the top and bottom-U uniformly output patches in a certain format-R comparison of files in two directoriesPatch File File.path Patching-B Plus-B backup source filesgrepgrep Key

Tag: The shell operator represents the deletion of the first character net article BSP comSuppose there is a variable var=http://www.aaa.com/123.htm.1. # Intercept, delete the left character, leave the right character.Echo ${var#*//}where Var is the

Integer operations in shell scripts are generally implemented by the two instructions of let and expr, such as the variable s plus 1 can be written: let "s = $s + 1" or s= ' expr $s + 1 'The two are not easy to write, but the performance of the

#!/bin/bash#! Delete duplicate files with identical contentsLs-ls--time-style=long-iso | awk ' begin{Getline;getline;Name1=$8;size=$5}{name2=$8;if (size==$5){"Md5sum" name1 | getline;csum1=$1;"Md5sum" name2 | getline;csum2=$2;if (csum1==csum2){Print

Metacharacters and descriptions commonly used in regular expressions Metacharacters Symbol name Description \ Back slash Escape character | Pipeline Or []

Linux+shell obtaining and copying the latest backup dataBefore we introduced some script configuration, today we introduce, using shell script How to copy the most recent files in the specified directory to the specified directory, we copy the files

Tag: set command; unset commandFor example: There are now two user-defined variablesName= "Andy Lau"Age=20The set command is used to view variables650) this.width=650; "Src=" Http://s5.51cto.com/wyfs02/M01/87/EF/wKioL1fkk0CQqSUwAADT1GLzRuI190.png-wh_

Format: echo "/033[word background color; font color m string/033[control code"If you simply display the font color can be fixed control code bit 0m.Format: echo "/033[word background color; font Color m string/033[0m"Word background color range: 40-

cd/usr/local/sbin///Store shell script directory.Vim guoguosql.sh//Run a PHP file every 30 seconds. File path is vim/home/wwwroot/www/domain/huitiao/web/sql.php#! /bin/bashand do Curl http://127.0.0.1:82/sql.php sleep -DoneSh/usr/local/

Shell Script Planning TemplatesIn Linux operations, shell scripts are indispensable tools, but each operator programming habits are different, many times is to implement a function, written out of the script is rotten seven or eight bad.Scripts must

Programming languages are generally divided into static languages and dynamic languages.Static language: Compiled language strongly typed (variable) pre-compiledExample: C C + + Java C #Dynamic language: Interpreted language weak type (default

|  Copyright Notice: This article for Bo Master original article, without Bo Master permission not reproduced.Hill sort, is a narrowing incremental sort. It is sorted according to the step size, different steps may produce different sequences, but