Shell

Remember this is the original play Cdlinux when, originally should be because of windows under the UltraISO to Cdlinux mirror changes cause the image can not boot, so use the command under Linux to operateThis should be the command to mount the ISO

There are several ways to execute the shell script1, relative path mode, you need to first CD to the script path[[email protected] tmp]# Cd/tmp[[email protected] tmp]#./ceshi.sh Script Execution succeeded2. Absolute path mode[[email protected] tmp]#/

1. ValueFormat:Test "NUM1" OPR "num2"["Num1" OPR "num2"]OPR Value:Equality:-EQUnequal:-neGreater than:-GTLess than:-lt "L is the lowercase letter L"Less than equals:-leGreater than or equal to:-ge2. StringFormat:[Str1 OPR str2][OPR str]OPR

Default variable for Shell script ($ ...)We know that directives can have options and parameters, such as Ls-la to see all properties and permissions that contain hidden files. So can shell script have parameters behind the script file name? It's

Today I learned to write a shell script, a little excited, hereby recorded (actually not difficult to write it)Reason:Now do the projects that require multiple engineering dependencies, but the trouble is that there is no automatic association of

1. #注释作用, #! Except in addition, in the parameter replacement echo ${path#*:} here does not represent the comment, the numeral conversion, does not represent the comment echo $ ((2#101011)) 2. Command line delimiter, you can write multiple commands

It's recorded in a shell script.. ./file.sh and/file.sh the difference, this article refers to the http://www.lslnet.com/linux/dosc1/39/linux-283534.htm (this blue forest thing should be derived from Chinaunix)A little experiment.Scenario One:VI

Below is the output information of my wlan0 NIC, you can use Ifconfig or Ifconfig | Sed-n '/wlan0/,10p ' gets the format of the displayed informationwlan0     Link encap:ethernet  hwaddr xx:xx:xx:xx:xx:xx             inet addr:172.29.164.251  bcast:

1. #注释作用, #! Except in addition, in the parameter replacement echo ${path#*:} here does not represent the comment, the numeral conversion, does not represent the comment echo $ ((2#101011)) 2. Command line delimiter, you can write multiple commands

1. Communication status650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M01/6C/79/wKiom1VJ15KAhrdGAAPwr4Vr-4M504.jpg "title=" 1.jpg " alt= "Wkiom1vj15kahrdgaapwr4vr-4m504.jpg"/>2. Start-Up service650) this.width=650; "src=" http://s3.51cto.com/

such as script scripts.sh1. Create a new shellAdd statement at the beginning of the scripts file: #!/bin/sh, via ./scripts.sh(requires execute permission) or sh scripts.sh(no execute permission required)2. Do not create a new shell, execute commands

4. Input and output#! /bin/bash# Read users input and then get his nameread"Please input your first name: " firstNameread"Please input your last name: " lastNameecho-e"Your full name is: $firstName $lastName"Read usage:read[-ers][-a 数组][-d

Tag:shell    reference     escape     command replace     Escape and reference two types of characters: normal character and escape character escaping: "\" Example: 1, Echo $Dollar 2, echo \ $Dollar 3, Ech O? Characters that need to be

Example one;Touch test.shVI test.shInputTest= ' echo ' test* "|grep [a-za-z0-9] |wc-c 'Echo $testSave, Exit VI;SH test.shResult: Echo "test*" |grep [a-za-z0-9] |wc-cDescription not implemented;We modify a pair of single quotes to $ () and the result

REDIRECT concept: Change the default input and output to another input/output file identifier Linux uses 0-9 to indicate the data flow associated with a particular process, and the system will open three files for that process when it starts a

idea, produce a random array, and then press the elements of the array to re-output the rows in the file 1, the generation of random array reading when it feels very simple. The first time with a little bit. The first is the definition,

2. UseThe grep command in a Linux system is a powerful text search tool that uses regular expressions to search for text and print matching lines. The grep full name is global Regular expression Print, which represents the globally regular

The application SP will have the requirements of registered funds, the whole network to reach 10 million, the net to reach a minimum of 1 million of registered capital, all need to be Chinese holding enterprises.  Frequently asked questions about

Shell breaks down file lines, The idea is to generate a random array, and then output the row in the file according to the array elements. 1. It is very easy to generate a random array. It was a little difficult to start using it for the first time.

Shell programming tmpwatch, shelltmpwatch As a system administrator, you often need to regularly clear files with certain rules, such as expired logs, expired archives, and backed up files. If you use certain matching rules to find these files and