Shell

The first scenario: do use multiple devices or simulatorsWorkaround: (Specify a device or emulator to connect to)1. Get the simulator/device list adb devices 2. Specify device to execute ADB shell

If your Zabbix Admin password is too weak or use the default password (Admin/zabbix), and the hacker cracked the password, Zabbix server in front of the hacker has no resistance. Hackers can create "system.run[command,]" Monitoring items to execute

The shell condition determines if the-Z to-D meaningShellfilestringless Terminal user[-A file] is true if file exists.[-B file] True if file exists and is a block special file.[-C file] True if file exists and is a word special.[-D file] True if

Set-o VIYou can use the last command with the Esc+k key again.Esc+kEsc+jUpside DownKsh default is Emacs style. Set-o EmacsUse the commands you've already used under AIXUsed under AIX, the default shell is Ksh, unlike bash under Linux, he can't use

Try to make your work more efficient, write scripts, and use scripts, often with less effort. So, take some time today to learn about shell scripting.--------------ahead of the high-energy warning, this article is written slightly entertain, if you

Once heard a great God told, with purpose to learn, knowledge often can remember prison, remember stability. With the help of mind Map this tool, some of the knowledge points I am interested in classification management. It is convenient for you to

How do I keep the service running? How can I ensure that the service is automatically restarted even if it is hung up? This is often a problem when you write a service program. In a Linux system, a powerful shell can handle such transactions with

Processing of seq in a shellBackground: Using the shell to extract the contents of the file, the filename is generated with the serial number as follows, the file nearly more than 400 W is as follows:Www.ahlinux.comOriginal script#! /bin/sh#str1 = ""

$ () and "(anti-quote ) are used to do command substitution. Next, let's see ${} ... It's actually used for variable substitution. Shell if interpretation statements are common:[Front and rear spaces] Front Space[-D file] True if file exists and

In the shell, arguments can be passed to a function when it is called. Inside the function body, the value of the parameter is obtained in the form of a $n, for example, $ $ for the first argument, and $ = for the second argument ...Examples of

  from the Code Farm supplement Linus and Linux, Chapter: Shell you may not know.   recently finished reading this book, feel that there are a lot of good content, this is one of the shell small dessert, bring to share with you, add some of my own

Typically, as a deployment script for an application, the first task that begins is to create a dedicated (dedicated) user and user group for the current app. This script is very simple, a reference sample is attached

This article was posted on my blog We know that HDFs is a distributed file system for Hadoop, and since it is a file system, there will be at least the ability to manage files and folders, like our Windows operating system, to create, modify,

Mkdir/server/scriptCd/server/scriptVI mysql_backup_db.sh#!/bin/shmysql_backup_dir=/data/mysql_backup/$ (Date +%f)[!-D ${mysql_backup_dir}] && mkdir-p ${mysql_backup_dir}User_pass= '-u root-pyeqing 'mysql_login= ' MySQL ${user_pass}-e "show Databases"

The Bash shell script programming knowledge points are as follows (beginner, incomplete, welcome to the discussion supplement):Shell IntroductionA simple introduction to scriptsVariables and referencesArithmetic operationsInteractive

$CatOpenstack_install.SH #!/usr/bin/EnvBashfunctionUsage {Echo "usage:$0 [optaion] ..." Echo "Master Install OpenStack Master in the This system." Echo "COMPUTE install OpenStack compute in the This system."Exit}functionprocess_option { Case " $"

Introduction [54,17] Bash itself does not support regular expression regex, while some tools under the shell support the interpretation of Regex , and the use of regex is Shell commands and tools , such as Grep,sed,awk. but the shell supports

Suppose we define a variable as:File=/dir1/dir2/dir3/my.file.txt can be replaced by ${} with different values: ${file#*/}: Delete the first/its left string: dir1/dir2/dir3/my.file.txt${file##*/ }: Delete the last/  and its left string:

Today when writing a shell script to find the need to set the user's password, and the setting of the password is interactive, so in the script is obviously not very good, so the Internet to find information, found the following two non-interactive

PrefaceTo remove an element from a list in Java, you can use the Remove method directly.In the JS array does not have the Remove method, but in the JS array has the Splice method can achieve the same effect, in addition, you can also use other ways