Shell

Under BinVim sms_monitor.sh#!/bin/bashCD ' DirName $ 'timestamp= ' date + '%F%h:%m:%s 'Disk_flag=falseInode_flag=falsePing_flag=falseCpu_flag=falseIowait_flag=falseSms_flag=falseDisk_over= ""Inode_over= ""Ping_over= ""Cpu_load_average_over= ""Iowait_

Programming is the process of writing program source code using human natural language or machine language. This is what we all know, because it, after all, has programmed what student performance management system, library management system. Wait a

Pipe characterIt is used for the output of the previous instruction as input to the latter instruction.650) this.width=650; "src=" Https://s5.51cto.com/oss/201711/16/1d984a59004a96e2f826e971888f9636.png "title=" Clipboard.png "alt="

Shell Special Symbols * Any of any characters ？ Any one character # comment Characters \ de-Semantic characters | Pipe character $ variable prefix,!$ combination, regular inside means end of line ; Multiple commands

the shell reads files by line There are many ways to do this, and here are three ways to write:Writing one:#!/bin/bash# Description: # while loop read Line operation # Author: Lone Boat Dot # version:1.0#创建时间: -one- Geneva:

1. Use the Dos2unix command to process scripts developed under WindowsThe following scenarios for placing scripts under Windows for editing under Linux are as follows:[[email protected] ~]# cat-v nginx.sh #!/bin/bash^Ma=1 n^Msum=0 ^ M while ((a 0

Loop syntax in the shellYun ZhengjieCopyright Notice: Original works, declined reprint! Otherwise, the legal liability will be investigated.A. For Loop1. Syntax format 11 for inch Value 1 value 2 value 3 ... 2 Do 3 Source Code 4 Done 　　2. Syntax

Frozen pottery mu Fpniy advised surname Xin http://weibo.com/u/6195707793Cang Chen Rao y2b0i apricot Jia Unitary http://www.docin.com/app/user/userinfo?userid=180238445Rabar 579QH http://tushu.docin.com/srfm596The i5szn of white Eclipse and the http:

There are n kinds of methods, awk, sad, grep, cut ...The above several ways do not write, just write two less commonly used to.Say less nonsense, directly on the code:Cat a.txt aa.gif=aaaa.gifbb.gif=bbbb.gifcc. gif=cccc.gifMethod One:#!/bin/sh while

The difference between $ (()) in the shell and $ () and ${}Http://blog.chinaunix.net/uid-14351756-id-2820651.html$ () and ' (back quotes) in the bash shell, $ () and "(anti-quote) are used to do command substitution.The so-called command

Before participating in the CTF competition when the temporary write, there are a lot of shortcomings, but can be used, put it out to share to everyone, hope to help everyone.Script one: Record the current directory situation#!/bin/bashfunction

Requirements: List which commands are most used and enter them into Chy1.txtIdea: Our command is all there is a history file/root/.bash_history This file, you need to sort the commands used

To list any process listening to the port 8080:lsof-i:8080To kill any process listening to the port 8080:Kill $ (Lsof-t-i:8080)or more violently:Kill-9 $

Shell script Beginner's Exercise Chapter650) this.width=650; "src=" Https://s2.51cto.com/wyfs02/M02/9F/7B/wKioL1mdXkfDFzntAAAXoHD3udQ741.png "title=" Images.png "alt=" Wkiol1mdxkfdfzntaaaxohd3udq741.png "/>Script 1  Function: Create 10 1M

One, parenthesis, round brackets () 1, single parenthesis () ① command group. The commands in parentheses will be executed in a new sub-shell sequence, so the variables in parentheses cannot be used by the rest of the script.   Multiple commands in

sed command file editingsed is a text editing command that reads file data through a terminal into a buffer, then edits text through SED, and in the output to the specified file, sed is a stream editor, which is a very useful tool in text processing,

While loop1)While CONDITION; DoStatementStatementDoneWrite a script that calculates 1---100 of the AND#!/bin/bash#Sum=0I=1While [$i-le 100]; DoLet sum= $sum + $iLet i= $i +1DoneEcho $sum2)While true; DoStatementStatementDone#!/bin/bash#While true;

Shell string manipulationThe bash shell provides several commands for string processing: awk command Expr command String length ${#..} Length of expr Length of awk (s)Instance:string= "Hello World"$ {#string}Expr

Hello everyone, I'm a singing program, ape ~~~~~~.Recently in the study of Linux, spare time on these basic commands to organize, I hope you can use, the purpose of the finishing is to forget when the turn out to see ^?_?^, before and after a total

In the Linux platform simulation of the Linux shell environment, can be implemented by a software: Cygwin (click to enter the official website to download), such as (select the corresponding version to download):　　　　Installation:1. Double-click the