Shell

#!/bin/bashcpu_usage_idle= ' Top-b-N 1 | grep Cpu | awk ' {print $} ' | Cut-f 1-d "." ' Let cpu_usage=100-$cpu _usage_idlemem_total= ' awk '/memtotal/{total=$2}/memfree/{free=$2}end{print (total-free)/ 1024x768} '/proc/meminfo ' mem_usage= ' echo

This is a very interesting question, because as a shell rookie, I have no idea for the first time. I wonder why this kind of operation Linux actually does not have a direct command to implement such a query.Naturally, the first feeling is to use awk

"Input_dir" represents the current directory, "Output_file" represents the output file, you can make your own changes according to the situation,1#!/bin/Bash2 functionGetdir () {3 forElementinch`ls$1`4 Do 5dir_or_file=$1"/"$element6

The importance of the shell is self-evident to every system adminstrator. Today Allah is here to talk about the acid and cool shell programming of those years.let's start with an entry-level programming example. By the way with the Dora of Allah's

1#! /bin/Bash2deploy_path=$ (CD"$ (dirname"$0")";pwd)3ini_file= $DEPLOY _path'/cnedmp_etl.ini'4 . $INI _file5base_path=$ (CD"$ (dirname"$DEPLOY _path")";pwd)6main_path=$ (CD"$ (dirname"$BASE _path")";pwd)7Currrent_date= 'Date-U +\%y\%m\%d

What is a Linux Shell A shell is a user program, or an environment that is provided for the user to interact with the system.It is a language interpreter that executes commands that are read from a standard input device, has its own built-in shell

in the recent completion of the teacher's assignments encountered how to let the shell script command automatically determine whether a user has set the password problem, although seemingly not a difficult problem, but in the process of

Start specifying the script interpreter# !/bin/bash or #!/bin/sh Opening plus copyright information#Date: 2017-8-01 22:50#author:yang Qiang wei #Mail: [email protected] #Funtion: This is delete ... #version: 1.0 No Chinese comments in

1. Prepare the tool to send the message:#!/usr/bin/python#-*-Coding:utf-8-*-Import SysImport SmtplibImport Email.mime.multipartImport Email.mime.textServer = ' smtp.163.com 'Port = ' 25 ' def sendmail (server,port,user,pwd,msg): SMTP = Smtplib.

VIEditoris the standard for all UNIX and Linux systemsEditorThat it's powerful not inferior to any of the latest textEditor, here is simply a brief introduction to its usage and a small number of instructions. Because of any version of UNIX and

1. REDIRECT Symbol> Output redirected to a file or device overwriting the original file>! Output redirected to a file or device forcing overwriting of the original file>> output redirected to a file or device to append the original file2. Standard

When we use the shell to process files, we often need to remove or add newline characters, the name of the problem is how to quickly replace it?We have such a file[email protected] working]# cat

First, what is the regularA regular is a way to describe a character or string by combining symbols with special meanings, called regular expressions. Or, the regular is the rule used to describe a class of things.Second, grep1. Parameters-N: Show

1. Write a loop to ping the IP of the entire subnet. using the while loop#!/bin/bash ip=223 While ["$ip"-ne "239"]do ping 121.201.0. $ip-c1 && echo "121.201.0. $ip yes" >> Ip_list.txt | | echo "121.201.0. $ip No" >> ip_list.txt ((ip+=1)) doneuse for

Tag:expr   bsp    Command    not   csharp    other   filename    line    awk    Shell Learning notemain= "/usr/local/" # Variable uppercase status= "$MAIN/status" # USD multibyte string is a reference variable value, while USD multibyte number

Practical Tips for ①centos:First, press the CTRL+ALT+F2 can be switched from the graphical interface to the command line (Shell window), press CTRL+ALT+F1 can be switched from the command line to the graphical interface (if the installation of

#!/bin/bashcheckprocess () {if[" $"="" ]; Thenreturn 1fi process_num= ' Ps-ef | Grep" $"| Grep-v"grep"| WC-l 'if[$PROCESS _num-eq1 ]; Thenreturn 0 Else return 1fi} while[1] ; Do#输入进程名 Echo" $"; Echo" $"; Echo" $"; Checkprocess"

Turn from: Some tips for getting a shell1. Upload asp asa jsp cer PHP aspx format of the Trojan, do not add a space or use IIS6.0 Parsing vulnerability, common format: 1.asp;1.jpg or 1.asp;. JPG or 1.asp;jpg2. Sometimes upload the image format of

The execution name of this program$n the nth parameter value of this program, n=1..9$* all parameters of this program, this option can have more than 9 parameters.$# the number of parameters for this program$$ the PID of this program (the current

Usually write scripts are not used in several groups, temporarily first record the usage.#!/bin/Basharray1=(1 2 3 4 5) Array1_length=${#array1 [@]}Echo "array1 Length: ${array1_length}" forIteminch${array1[@]} Do Echo "Current item of array1: