Shell

one, pipe and operation controlCat 1.txt |wc-l; Cat 1.txt |grep ' aaa 'Enter the result of the preceding command to the following commandCTRL Z pauses a task, the task is hidden in the background, and the FG can be used to lift the task to the

#!/bin/bashremote_ip=$1if[!-N" $"] ; Then Echo "Please usage./without_password remote_host!"Exit1Else Echo "The remote_host you input is $remote _ip"fiSSH[Email protected] $remote _IP"mkdir. ssh; chmod. SSH"Ssh-keygen-t RSASCP~/.SSH/id_rsa.pub

1.1 The following table is a logical operatorTips:！ Inverse: A logical value that is opposite to a logical value.-A Chinese meaning is with (&&): Two logical values are true return values are true, and vice versa is false.-O Chinese meaning yes or

#!/bin/bash# lty 20180116# fastdfs install scriptif [  ' Id -u '  -ne  0 ];then    echo  "Non-root user, script exit"     exit 0fiif  [ ! -f  "/root/soft/fastdfs_install.sh"  ];then    echo  " Reinstall the installation script side after

Exercise 1:User interaction ScriptsRequirements: write a script that, after execution, prints a line that says "Please input a number:", asks the user to enter a value, prints out the value, and then asks the user to enter the value again. Until the

1. What is a shell?Open the system, enter ZS, press the Tab key, the command Zsoelim appears,Description No zsh command, this time can be installed, first enter the command yum list |grep zsh, enter, search,You can see that there are zsh commands,

1. Shell command IntroductionThe shell is the user interface of the system and provides an interface for users to interoperate with the kernel. It receives the instruction entered by the user and sends it to the kernel for execution. A shell user

#!/bin/bashbackup_dir=/oracle/backuplog_file= $ORACLE _base/admin/$ORACLE _sid/cold_backup_$oracle_sid.logecho   "Backuping cold backup"  > $log _filedata>> $log _filesqlplus -s /  As sysdba > $log _fileset pagesize 0 linesize 1000 

\u indicates that the current user name \h represents the machine name \w represents the base name of the current working directory \w represents the full path to the current working directory. $, $, $, $: $ The name of this shell file refers to the

Using Nginx log file to count all IP and PV, list the top 10 IP, take confluence Knowledge base system as an example:Nginx log file is/var/log/nginx/access.log# wc -l /var/log/nginx/access.log 95146 /var/log/nginx/access.logShell script:# vim

CommonCtrl+r: Quick Search History Command (Retrieve)Ctrl+u: Delete entire command line text character (Unity)Ctrl+s: Pausing a Running program (STOP)Ctrl+q: Exit Pause (quit)CTRL + Z: Enables tasks that are running in the terminal, running in the

First, ifSyntax format: If test-d $arg then ... else ... fiVariable test statements can be simplified with []. Example: test-d $arg equivalent to [-D $arg]. (Note: "Space" ["Space"-D "space"])For more test commands see: http://www.cnblogs.com/fangwu/

The code is as follows:Download: Https://gitee.com/LoongWang/shellrecycling.git1#/usr/bin/EnvBash2 3 4 #定义5 #定义回收站目录6Recyclingdir='/usr/local/recycling/'7 #定义回收站log文件8recyclinglog='/var/log/recyclinglog'9

With the more and more application of Linux system in enterprise, the automatic management of server becomes more and more important, in some complex Linux maintenance work, a lot of repetitive output and interactive operation are not only time

11. Scripting, man-machine Games#!/bin/bash#Author: The Adventures of Tintin (Jacob)Game= (Stone scissors cloth)NUM=$[RANDOM%3]computer=${game[$num]}#通过随机数获取计算机的出拳#出拳的可能性保存在一个数组中, game[0],game[1],game[2] are different possibilities in 3,

If statementBasic formatFormat 1:if condition; Then statement; FiFormat 2:if condition; Then statement; else statement; FiFormat 3:if ...; Then ...; Elif ...; Then ...; else ...; Fican use && | | Combine multiple conditionsIf [$a-gt 5] && [$a-lt 10];

1. Shell: Command interpreter1) supported shells are saved in/etc/shells2) Default shell is/bin/bash2. Shell script writing:1) using the VI Editor2) One command per line, followed by3) Give executable permissions (x)3, the way of implementation:1)

Mathematical calculations in the shellOne, use square brackets#!/bin/Basha=tenb=c=res=$[$a * ($c-$b)] Echo $resIi. usage of BCBC Technology is actually a programming language that recognizes: numbers (integers and floating-point numbers)

The company project used Springboot. Applications that are developed need to be automatically uploaded to the server. Although the current thermal deployment is not fully mastered. First use the shell to simplify deployment.# upload Key Sshloginkey=/

Use of the special variable IFS in shell, and the difference between the value of $ '\ n' and' \ n', shellifs When a for loop is used in shell, the IFS is also used to define the separator. To specify multiple IFS characters, you only need to