Shell

Automatic backup of the entire database Implement a library to back up a file Implement exclude libraries that do not require backup Implementing Backup to Compressed files Implementing a backup file that defines how many days

---restore content starts---The calculation of the shell is actually already in contact with Linux. Every time in the use of the Internet is looking everywhere, so think to spend some time to study.First understand the following commonly used

Implementing a certain bit of a register with a shell scriptPit bit 1:Not recognized on the Development Board (Ubuntu can)For ((i=0;iDoDoneInto:For i in ' seq 0 6 'DoDonePit bit 2:return value by default only 8 bits are truncated.Setbits $ $4Regv=$?

DownloadPlease download it to https://github.com/mbadolato/iTerm2-Color-Schemes.git clone https://github.com/mbadolato/iTerm2-Color-Schemes.gitInstallationTo install: Launch ITerm 2. Get the latest version at iterm2.com Type cmd+i (? +i)

1. Position variable(1) $ ==> Take file name[email protected] ~]# cat test.shEcho[Email protected] ~]# sh test.shtest.sh[Email protected] ~]# sh ~/test.sh/root/test.shDescription: When executing a script, the script name is preceded by a path to the

First, the basicView all shellsCat/etc/shells or Chsh–l1. Examples of scripts.Linux does not differentiate files, for the convenience of memory, here with. Sh end.(1) Vim first.sh#!/bin/bashMkdir/root/shellIfconfig(2) Add Execute permissions chmod

1. Perform the command locale view, which appears as follows:[[Email protected] ~]#localelang=ZH_CN. Gb2312lc_ctype="zh_cn.gb2312"lc_numeric="zh_cn.gb2312"Lc_time="zh_cn.gb2312"lc_collate="zh_cn.gb2312"lc_monetary="zh_cn.gb2312"lc_messages="zh_cn.gb2

Case requirementsBatch build Linux users with shell scriptsImplementation requirements: Create user student1 to Student50, specify Group as student group! And each user needs to set a different password!Implementing scripts#!/bin/bashgrep ‘student‘ /

View Catalogawk ' {if (!system ("test-d")) print $} 'Batch Quick Create user for in user{0.. Ten Do useradd $i echo123456passwd --stdin $i DoneUse the IF statement to determine#!/bin/bash# file Judgmentif[-E $1]; Then Echo "File

First shell script# VI test.shAdd the following:#!/bin/bashecho "Hello World"#! is a contract tag that tells the system script what interpreter to execute, which Shell to use.The echo command is used to output text to a window.There are two ways to

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

Variable:1. Variable declaration eg:#:name= ' EKO '#!/bin/bashMyurl="http://www.w3cschool.cc"readonly myurl / /declare read-only variables2. Variables using eg:#:echo $name #: Echo ${name} 3. Delete variables eg:#: Uset Name4. Variable type:

in the In a Shell script, some operations that need to be reused are defined as public statement blocks, which can be called functionsWhat are the benefits of using functions? Make script code more concise, enhance readability and improve execution

1/ETC/PASSWD: User account information/etc/shadow: Secure user account information/etc/group: Group account information/etc/gshadow: Security group account information2ID: View the user ID and group ID of the current userId-u: Show only User IDId-u

2. process file 2.1 Create file TouchIf you want to change the access time only, you can use the-a parameter.$ ls-l Test_one-rw-rw-r--1 Christine Christine 0 may 14:35 Test_one$ touch-a Test_one$ ls-l Test_one-rw-rw-r--1 Christine Christine 0 may 14:

One, pipe and operation control1. Pipe character: | (The result of the previous command output to the following command)Count the number of files after the ls command: LS |wc-lList the number of files in the/etc/directory: find/etc/-type f |wc-l2.

Tagged with: Linux centos Shell wildcard8.1shell IntroductionThe shell is a command interpreter that provides human-computer interaction.Supports specific syntax.Each user can have their own specific shell (bash).CentOS7 default bash (Bourne Agin

First, the alarm system main script[[email protected] ~]# cd/usr/local/sbin/# #脚本基本都放在这个文件夹下, convenient management [[email protected] sbin]# mkdir mon## Create a monitoring script home directory [[[email protected] sbin]# CD mon[[email protected]

This is a shell script practiced hand program that exercises the use of a for statement#! /bin/bashn=0while read arr[$n] #通过键盘给数组赋值 ... The first element of the array is saved in arr[0] ... Enter indicates the input interval for the element, ctrl-d

[TOC]Shell functions and arrays one, Shell function 1.1 function format 1function name { commands}Example 1:#! /bin/bashfunction inp(){ //定义一个inp的函数echo $1 $2 $3 $0 $# }inp 1 a 2 b //传入参数 //传入参数Run