Shell

Let's start with an example: Suppose you have a test service that can start, shut down, or restart test by command, the following script simulates this feature:#!/bin/bash#test.shcase $ in start) echo "Starting service ..." sleep 1

8.10 Shell Special Symbol Cut commandCommand: CutUsed to intercept a fieldSyntax: cut-d ' delimited character ' [-CF] n Here's n is the number-D: followed by delimited characters, separated by single quotation marks-C: followed by the first few

Shell Script third-- Monitor the host's disk space and send mail to warn when more than 90% space is used#!/bin/bash#monitor available disk space#提取本服务器的IP地址信息ip= ' ifconfig eth0 | grep "inet addr" | cut-f 2-d ":" | Cut-f 1-d "" 'space= ' df-hp |

8.1 Shell IntroductionThe shell is the intermediate medium used when the system interacts with the computer hardware, and it is just a tool of the system.The user directly faces not the computer hardware but the shell, the user instructs the shell,

1. Scope of applicationThis document describes the implementation of the function implementation principle in the kernel module in the shell command line.In VxWorks, the system comes with the function of directly executing the driver and in-app

Pipe characterIt is used for the output of the previous instruction as input to the latter instruction.650) this.width=650; "Src=" Https://s5.51cto.com/oss/201711/16/1a4adbd82674ccd735f9b4748eaac9ac.png-wh_500x0-wm_3 -wmp_4-s_2715965200.png "title="

Method 1:These two days in the camera Bringup, need to add chromatic file, because there is too much to replace the contents of the file, manually change the file configuration a bit less practical, so Google a bit, to find a good way to replace the

I. If statement650) this.width=650; "src=" Https://s4.51cto.com/oss/201711/11/8a70ba0e53f279453f8d8b3561cedf7f.png "style=" float: none; "Title=" screenshot from 2017-11-11 20-01-52.png "alt=" 8a70ba0e53f279453f8d8b3561cedf7f.png "/>650) this.width=6

Have you ever experienced a situation where you log in to a remote Linux host from the terminal software, Compress a large pile of files into a. tar.gz file, compressed for half an hour is not finished, at this time, suddenly you broke the network,

Topic (i)There are 1 2 3 44 digits, any combination of how many different and no duplicates of the number, what is the difference?The shell code is as follows:#!/bin/bashFor i in ' seq 4 'DoFor x in ' SEQ 4 'DoFor y in ' seq 4 'Do[$x-eq $i] &&

Script to detect OSObjective: After learning the shell language, according to the script that has been learned to write a shell to detect some of the system parameters to achieve email alerts,(I have just learned to write less perfect and practical!)

Environment Ubuntu16+nginx+python2.7.12+postgresql9.5+odoo 10.0 Community#!/bin/bash#author:[email protected] #date: 2017-09-06#description: Deploying Odoo 10.0 Shell Ubuntu >=14odoo_options

Reprinted from: http://www.jb51.net/article/60326.htmWhat I want to say here is a few shell parentheses, braces and parentheses, the use of commands, as follows:1.${var}2.$ (CMD)3. () and

Awk" Syntax "awk "option" pattern action filenameprogram:pattern+actionIf there are multiple statements in the action, you need to use;Eg:awk ' begin{test= "Hello gawk";p rint test} '1. PrintPrint item1,item2, ...1) Comma delimiter2) Each item of

Reprinted from: http://www.cnblogs.com/davygeek/p/5670212.htmlLearn to write a script today encountered some variables do not know, here do the next record. Variable Meaning $ File name of the current script

A. For statement1. Use the For statement to add users in bulk650) this.width=650; "src=" http://s3.sinaimg.cn/bmiddle/006OWCmEzy7cGLCj6ued2&690 "Name=" Image_operate_ 75451500196244212 "alt=" shell script some basic statements of the use of "title="

The shell itself is a program written in C, which is a bridge for users to use Unix/linux, and most of their work is done through the shell. The shell is both a command language and a programming language. As a command language, it interprets and

1. Write Script/root/bin/systeminfo.sh, display the current host system information, including hostname, IPV4 address,OS version, kernel version, CPU model, memory size, hard disk size.Analysis:Explain:This is a stack of commands, and it's easy to

1.bcCommon calculation Tools , and supports floating-point arithmetic:[Email protected] shell]# echo | Bc2floating point number accuracy problem not resolved[Email protected] shell]# echo "1.2*1.2" | Bc1.4[Email protected] shell]# echo "scale=2;1.2

Pom.xml Jar Package Support com.jcraft jsch 0.1.53 Code:Package Com.spring.bean.annotation;import Java.io.bufferedreader;import Java.io.ioexception;import Java.io.inputstream;import