Shell

First, the meaning of the ADBthe full English name of ADB is Android Debug Bridge, which is Android debugging bridges; theadb executable is stored in the Android SDK, so you will need to download and install the Android SDK tool with the ADB command,

File Comparison characters-e filename true if filename exists [-e/var/log/syslog]-D filename True if filename is a directory [-d/tmp/mydir]-F filename True if filename is a regular file [-f/usr/bin/grep]-L filename True if filename is a symbolic

The shell script is processed periodically as follows: Cat /home/backup/logs_delete. SH #!/bin/bash/bin/find"*.log*" -mtime +4 -type f| Xargs mv {}/mnt/logs/nginx//bin/find"*.log*" -mtime +30 -type f| Xargs RM-L04 * *

In addition to being an interpreter, the shell is a high-level programming language with variables, keywords, and a variety of control statements.Command historyHistory displays a list of historical commands, including its ownHistory 50 shows the

After MySQL installation on Linux uninstall is not clean, ping server ping does not pass the ICMP protocol is closed, Ping is using the ICMP protocol. Export is a global variable that all users can log in to use.Introduction to 1.iptables firewall

This is I learn to make notes or to make notes on their own easy to remember the format is very important examples are reference I also made the color on the impression notes to distinguish it on the top of it. read for interactive scenarios

How do you implement a shell-like command to assign a value to a variable under bat?At first, it was really hard for me. With the familiarity of bat batch knowledge deepened.Learning to!!!Give me a chestnut:Svnlook UUID C:\Repository\test # What do

[TOC]Shell Programming (ii) One, the logical judgment in Shell Script 1.1 judgment Statement if1.1.1 format 1:if 判断语句；then commandfiExample 1# vim if01.sh //判断数值大小第一种方法用[]，注意前后空格#!/bin/basha=5if [ $a -gt 3 ]then echo

In the use of Linux system, we often need to perform some operational analysis of the file, such as sorting the text, to remove weight, to intercept some of the rules of the field. Cut,sort,uniq is easy to use.1.sort: Generally there are three modes,

8.10 Shell Special Symbol Cut command : Represents any arbitrary character？ : Represents any single character#: Denotes comment characters\ denotes a de-semantic character| Represents a pipe characterThe Cut command is used to intercept a

Locate command1.locate filenameFuzzy match as long as the file name contains the keyword can beNon-real-time lookup, faster than find.Rely on index database/var/lib/mlocate/mlocate.dbAutomatically run once a day to update the database.UpdateDB

In the shell script, the variable definition, the reference each has the different way, in addition, very commonly has the file attribute judgment, the logical operation, the numerical operation and so on, the following record their attribute

1. Exit status of the command (1), (Kw:exit status)Each command has an exit state, represented by a non-negative integerStatus code 0 indicates that the command is running without errorsNon-0 Status code indicates a command errorThe range of status

Operating system: CentOS 7.2SendMail Automatic Alarm#完成时间: 2018.04.16#!/bin/bash#CPU 1,5,15###########################################################If [-e Detection_script]ThenMkdir-p/detection_script/Fi#############################################

An environment variable 1 overviewThe bash shell uses a feature called environment variables to store information about the shell session and the work environment, which also allows false data to be stored in memory so that the shell can run

10.1 Commond: Suppress normal shell function lookups 10.2 exec: Replacing the current shell process with the Execute command 10.3 Bash:gnu's Bourne-again shell interpreter 10.4 Builtin: Execute shell built-in command 10.5 Enable:

ForWhileIfCase 1. for usage 1 for 变量 in 值1 值2 值3..；do 执行语句 done Usage 2for 变量 `命令`;do # 可以引用命令执行结果 执行语句done Usage 3for ((初始值；循环控制；变量变化))；do 执行语句done #C语言风格的for循环用法For loop

Preface: Before we get to the point, let's review the conditional tests on scriptingOne, Process Control Over-programming languagesA. Sequential executionB. Select executionC. Cyclic execution Sequential executionAs the name implies, it is

What is direct assignment?1. The way the author directly assigns parameter values is called direct assignment.2. In general, an indirect assignment is assigned by an interactive method.Example 1:varl=arppinging.comThis is a direct assignment that is

Write a simple alarm system with the shell Create a directory structure mkdir -p /usr/local/sbin/mon/{bin,conf,shares,mail,log}mon //主目录bin //主程序目录shares //子程序目录mail //发邮件目录log //日志目录Program Main entry