Shell

MySQL database backup and recovery Brief:One, database backupSecond, database recoveryOne, database backup1, Backup simple description: System operation, incremental backup and overall backupExample: Every Sunday overall backup, Monday to Saturday

What is a Shell?Outline "Preface " 1. Shell Introduction 2, Bash function introduction 2.1. Record command history 2.2. Command and file name completion 2.3. Aliases2.4. pipe character/redirect 2.5. Shortcut keys 3. Bash

Special usage of $0,$?,$! in shellVariable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All

#!/bin/sh# Describe:check the real server status# history:2015-08-25 22:21:38# Author:timPath=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/binExport PATHvip=192.168.1.121dip=192.168.1.112rip= ("192.168.1.122" "192.168.1.123")Vport=8

One of the basic features of the bash shellFirst, the Order historyBash records the command that the user executed in the shell session in the buffer, and when it exits normally, it is recorded in the current user's home directory.

This post is from Chinaunix Lovesaka's > original address: [url]http://bbs.chinaunix.net/thread-846189-1-1.html[/ URL] Very early read the content here, the reason will find this article, is because my Linux mentor, There have been a number of

There are a number of ways to intercept strings in the shell, ${expression} There are 9 ways to use them. ${parameter:-word}${parameter:=word}${parameter:?word}${parameter:+word} The above 4 alternatives can be used for default values. ${#parameter}

1. HBase provides a shell terminal to interact with the user2. The DDL operation of the HBase shell(1) Enter HBase shell command line first, that is hbase_home/bin/hbase shell ... >quitTo Create a table:>create'Users','user_id','Address','Info' //

最近在windows上编辑一些shell脚本后上传到交换机框体上后，这些shell脚本无法执行，每一行结尾都有‘^M‘，同时框体上又没有dos2unix工具，这么多脚本也不可能一行一行来修改，于是就自己写了一个脚本来把当前目录下所有文件中的‘^M‘去掉。#!/bin/shFilename=' ls ' forFinch ${filename}; Do if[- F ${f}]; Then Echo "Delete ' ^m ' and rename file to ${f}1

This article mainly uses three scripts to implement the LVS configuration. Script 1:lvs.sh is configured on the load Balancer side, and script 2:realserver.sh is configured on the backend real server server. Script 3:check_lvs.sh is a script used to

Gitlab backup files are displayed in timestamps, similar to: 1438624820_gitlab_backup.tar to make it easier toread, you want to convert the file name to a date format:2015-08-04_gitlab_ Backup.tarSo I looked for the method of time conversion in the

In the loop, sometimes you need to force out of the loop when the loop end condition is not reached, like most programming languages, the shell also uses break and continue to jump out of the loop.Break CommandThe break command allows you to jump

Because the shell appears to be a common feature between UNIX systems and is standardized by POSIX. As a result, shell scripts can be applied to many systems once they are "written attentively". Therefore, the reason to use shell scripts is based on:

Open a text editor, create a new file, the extension sh (sh for Shell), the extension does not affect the execution of the script, see the name is good, if you write a shell script in PHP, the extension is good with PHP.Enter some

Processing of parameter processing-shell incoming parameters1. The number of arguments passed to the script by $# 2. $* displays all parameters passed to the script in a single string. Unlike positional variables, this option parameter can exceed 9 3

#!/bin/shbackup_timestamp= ' Date +%y%m%d 'Hostname= ' HOSTNAME 'num=89################### Verification File system opt################Memuseopt= '/bin/df-kp| grep/opt | Awk-f ' {print $} ' | Awk-f '% ' {print '} 'If

1.Bash variablesUser-defined variables #局部变量environment variable #全局变量Positional parameter variablesPre-defined variablesX=val #赋值$x #调用Variable defaults to character type and cannot be directly calculated"$x" ${x} variable overlay, that is, the

A brother in the forum to toss two variables at the same time, do not know how to toss. Later learned that you can use an arrayAll forget the shell and the array.wrote a test program. Record it. I also have an impression in the

After an intranet implementation of the SVN extranet release, if you want to publish SVN to the external network, you must be on the local or server installed VISUALSVN server. In the process of practice, my SVN installation has been an error. The

Frequently used shell commands for updating Mac server services On the Mac server, you must enable remote logon. Enable: system preference settings-> share check remote LogonCommon Commands include: Copy (copy the local file to the remote server)