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Experimental environment A minimal installation of the CentOS 7.3 virtual machine Installing NginxInstalling Nginx Dependency Packagesyum install -y pcre-devel zlib-devel openssl-devel wget gcc tree vim Nginx relies on Pcre,

read:Brief introduction:The read command reads the value of a variable from the keyboard and is typically used in a shell script to interact with the user. The command can read the values of multiple variables at once, and the variables and input

I. Introduction of IFSThe Shell script has a variable called IFS (Internal field Seprator), the internal domain delimiter. The full definition is the shell uses the value stored in IFS, which are the space, tab, and newline characters by default, to

Some of the simple scripts that you've knocked over and put them on the occasional look, it won't be long before you feel very pediatric, but it should be helpful to understand the process control of shell scripts.#!/bin/bashp=176.202.52.For I in $ (

Nginx Series -1.linux Installation Nginx catalogue-Nginx Series Nginx Series -1.linux installation NginxNginx Series-2. Configuring the Lnmp (Linux, Nginx, MySQL, PHP) architectureNginx Series-3. Configuring Nginx Virtual HostNginx Series -4

Note Using expr:The operator and the number used for the calculation have at least one space around it, otherwise the errorWhen using multiplication sign, a backslash must be used to mask its specific meaning.An enterprise-class case study of

#!/bin/sh# crontab usage: */2 * * * * /home/http_restart.sh > > /backup/restart_apache.logmin_ram=3200free_ram= ' free -m| grep mem|awk  ' {print  $4} ' echo $ (date + "%y-%m-%d")   ' uptime ' if [  ' echo  ' $FREE _ram This article is from the "my

//iOS Plugin Development//Echo IOS Plugin Example//configured in CONFIG. //Echo Header File#import @interface Cdvecho:cdvplugin//instance Method-(void) Echo: (Cdvinvokedurlcommand *) command; @end//Implementation Part#import

Of course, PHP's date function is not possible to directly output Chinese date, but you can use this method to write a function of their own.Code to copy code as followsfunction today () {Date_default_timezone_set ("asia/chongqing");$a =date

How to install jre in RHEL5? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Ladies and gentlemen, I downloaded the jre-6u22-linux-i586.bin, refer to the installation

Previously, Fl had the XSS Automatic repair function of the Smarty template, but it has never been supported by the PHP template. The main reason is that the output of the Smarty template recognition variable is relatively simple. You can determine

What is shell script? Shell is a tool that allows us to communicate with the system on the command line interface. shell scripts are programs written using shell functions, which use plain text files. Write some shell syntaxes and commands in it,

In the past few days, when writing Android. mk, sometimes I always want to print some variables or something. If ECHO is not available, I can find a way to access the Internet. Finally, I found such an article quite well. Address:

Document directory Problem locating: Subsequent prevention: Problem: nosuchmethod is reported when the application is released. This problem does not occur during the test environment. Generally, this problem occurs because two identical

First, the batch file is a text file, and each line of this file is a DOS command (most of the time it is like the command line we execute at the DOS prompt ), you can use any text file editing tool such as edit in DOS or notepad in Windows to

What are the commands in the batch file? For the time being, the commands in the batch file can be understood as the DOS command, and will be explained later. batch Processing, as its name implies, is a pile of things heap together for

#! /Bin/bash######################################## ## Function: auto fdisk# Usage: Bash auto_fdisk.sh# Author: customer service department# Company: Alibaba Cloud computing# Version: 2.0######################################## #Count = 0Tmp1 =/tmp/

Arithmetic Operations The arithmetic operations mentioned here refer to addition (+), subtraction (-), multiplication (*), Division (/), and remainder (%, you can add parentheses to change the priority and only perform operations on integers (Linux

As we all know, if ECHO is followed by an environment variable, but this variable is empty, it is equivalent to echo without any parameters, that is, whether the current ECHO is on or off. The solution provided by many articles or tutorials is to

  Use if... then Single-layer, simple conditional   If [conditional statement]; then Command work content that can be executed when the conditional statement is set; FI   & Stands for and; | Represents or;   ["$ YN" = "Y"-