Shell

Previously only heard DreamHost support shell, but not specifically used, mainly in the past is not very need, has not uploaded too many things. Recently because to upload a large number of files, suffering from the speed of optical cable can not

1.if is a single branch statement, using the following format: if condition; Then Statement ..... Fi 2.if ... else is a two-spoke statement, using the following format: if condition; Then Statement .... Else Statement .... Fi 3.if ...

For the user to enter the validity of the date test is a very important issue, this example is simple to get the user entered the date, and converted to the appropriate format, but not perfect, why please read the text. #!/bin/sh #

The special symbols commonly used in the shell are listed below: # ; ;; . ,/\ \ ' String ' |! $ ${} $? $$ $* "String\" * * * *? : ^ $# $@ ' command ' {} [] [[]]] (()) || && {Xx,yy,zz,...} ~ ~+ ~-& \\ +-%= = =!= # Well No. (comments)This is

Copy Code code as follows: #!/usr/bin/expect-f Set Timeout 30 Set Host "192.168.1.198" Spawn ssh $host Expect_before "No"? { Send "yes\r"} Sleep 1 Expect "Password:" Send "123456\r" Expect "*#" Send "echo my name is

In Linux if planning time is a hassle, Use the awk script as follows BEGIN {fs= ":"; ofs= ":"} {total_seconds=total_seconds+$3} total_seconds>=60 {Total_seconds=total_ sconds-60 $2=$2+1 } {total_minutes=total_minutes+$2 $2=$2+1

This article to introduce you to the very detailed, specific details please see below. Start the installation modify the/etc/inittab file first: Id:5:initdefault: To Id:3:initdefault: #vi/etc/inittab and restart the computer. The system

Get the number of rows in a single file File: test1.sh Number of rows: 20 Method One Copy Code code as follows: awk ' {print NR} ' test1.sh|tail-n1 As shown in the figure: Method Two Copy Code code as follows:

1. FTP automatically log in to bulk download files. Copy Code code as follows: # # # # # # # # # #从ftp服务器上的/home/data to local/home/databackup#### #!/bin/bash ftp-nOpen 192.168.1.171 User Guest 123456 Binary Cd/home/data

This shell script is primarily used for initialization of newly installed Linux server systems, including: Turn off the IPV6 module Close SELinux Let vim display color Set System language encoding Optimizing System Services Kernel parameter

First, topsy variables and environment variables Variables are an essential part of any programming language and are used to hold variables of various types. Scripting languages are mostly weakly typed languages (dynamic languages), which means

There are several ways to bash a shell script, assuming that the file name of the shell script we have written is hello.sh and that the file location is in the/data/shell directory and has execute permissions.Method One: Switch to the directory

Use of the Let command[Email protected] shell]# i=2[[email protected] shell]# let i=i+8[Email protected] shell]# echo $i10[Email protected] shell]# i=i+8[Email protected] shell]# echo $i10+8[Email protected] shell]#It can be seen from the above that

Save a script file under Windows, upload to CentOS with SSH, add permission to execute Nginx prompt without that file or directory.The shell script is placed in the/etc/init.d/directory, and then executes the/etc/init.d/nginx, prompting more of this

An error occurred while executing the script in Ubuntu system "Source command not found in sh shell"This is actually a script that executes in Ubuntu by default with dash, not bashby command#LS -l 'whichsh/bin/sh --dashWe found that the SH used by

##### #shell Script ##########Bash Script BasicsBASH = GNU Bourne-again Shell,bash is a project developed and promoted by the GNU organization.Bash scripts are similar to batching, simply by putting a lot of instructions together and providing loops,

#!/bin/bashecho "Current datetime is:" ' Date 'echo "Hello world!"#使用变量: You can use single or double quotation marksYour_name= "Wang"Echo $your _nameEcho ${your_name}Str= ' Shellstudy 'Echo ${str}#只读变量: Cannot change its valueMyurl=

first, the implementation1, parallel execution of commands, multiple commands separated by semicolons[Email protected] network-scripts]#Date;W.H.O.Tue May3 -: -: -Cst .Root Tty1 .- to-Geneva on: +Root pts/0 .- to-Geneva -: A(192.168.78.1)2

The main purpose of the script is to practice capturing signals in a Linux bash script, by practicing the use of functions, and by terminating a running program, subsequent processing of files opened by the program, and so on!Scripting Features:Ping

#!/bin/bash#createdate: 2016-11-15Date= ' date+%f ' "%h:%m"ip= ' Ifconfigeth0 | awk '/inet addr/{print $} ' | Cut-d:-f2`Echo-e "\033[032mdate: $Date \nhost: $IP \n\033[0m"echo-----------------CPU----------------Cpu_us= ' Vmstat|awk ' {print $13} '