Shell

Original works, allow reprint, please be sure to use hyperlinks in the form of the original source of the article, author information and this statement. Otherwise, the legal liability will be investigated. http://nbmonster.blog.51cto.com/1977736/665

Linux ops shell script gadget, if you want to share this article, please indicate the source of the article, the following script is for reference only, if the error placed on the server, the consequences please be conceited1. Detecting CPU percent

Recently in the Zabbix, the company has six new servers. When the Zabbix client is deployed, the baby is really angry. Grandpa's always so repetitive work is also not AH. But as a war five slag, what else can be mixed with rice? Think of last year

* matches any character of any length? Match any single character[0-9] Match all numbers[] matches any single character within the specified range[^] matches any single character outside the specified range[WXC] matches any one of the characters in

#!/bin/bashif [ -e $1 ]        then                 echo  "Directory exists"          else        {                          echo  "Directory does not exist, whether create 1 is 2 No"                          read -p  " Please enter 1 or 2: " mulu   

The shell monitors cpu,memory,load average, logs to log, and notifies the administrator when the load is under pressure.Implementation principle:1. Get the value of Cpu,memory,load average2. Determine if the value exceeds the custom range, for

First, build GitlabPS: Not experts in this area, mainly or one-click Installation-oriented.1, enter the official website: https://about.gitlab.com/gitlab-com/2, choose your own operating system: My side of the choice of Ubuntu 143, according to the

Ehco and returnreturn   Returned is the status code, function end Return does not return function return value You can return the function return value with echo in front, return the specified function exit status code Echo returns the

　　Quotation marks are often used when writing shell scripts, and sometimes the difference between single and double quotes is always forgotten.So just tidy up for the future when the brain is not good to come to review. First, what they have in

Guide Unlike the Java, PHP, and other languages, the Linux shell has its own process control statements, including conditional statements (IF), loop statements (for,while), and SELECT statements (case). I'll use the example below to illustrate

I. Command substitutionA. in Bash, $ () and ' (anti-quote) are used for command substitution.B. command substitution is similar to variable substitution, which is used to reorganize the command line, complete the command line in quotation marks, and

In the Iterm2 v3.0 version, there is a new Feature--shell integration, the more important function is to replace the traditional "RZ", "sz" (that is, upload to the server, download files)The specific usage can be found on the website as

#!/bin/Shmaxrstcount=5; Proctogo=/mnt/hgfs/code/test/Show#count isThe counter of test started Timescount=0Sys_reboot () {echo"system is going to reboot"; Reboot;} Main_loop () { while : Do######################################### prostillrunning=

& placed after the startup parameter to set this process as a background processBy default, the process is the foreground process, then the shell is occupied, we can not do other operations, for those who do not interact with the process, many times,

Original address: http://www.cuiweiyou.com/1405.html0.shell[Email protected]:~# Hadoop Fsusage:hadoop fs [generic options] [-appendtofile ... ] [-cat [-IGNORECRC] ...] [-checksum ...] [-CHGRP [-R] GROUP PATH ...] [-chmod [-R] PATH ...] [-chown

Recently many students watching my video tutorial, the VII is curious about the goods, VII is a relative of VI? Why use it to create a new program to automatically populate the program framework code? Today, we'll have a steak.In fact, VII is a

Z Shell ' s (zsh) popularity has increased in the last years. I have no moved too zsh yet, but I am going to do.Zsh is isn't installed in Linux by default, but it can be installed easilly with a package Manager:1. Check If ZSH is already installed

Cut [-bn] [file] or cut [-c] [file] or cut [-DF] [file]Instructions for useThe cut command cuts bytes, characters, and fields from each line of the file and writes those bytes, characters, and fields to standard output.If you do not specify a File

Document descriptionThe shell script is designed to provide a relatively automated solution for the patrol of a large number of Linux servers. The script consists of three parts: shellsh.sh, checksh.sh, file.txt; these three files need to be placed

Shell Process Control (if structure loop structure branch structure)Controlling the execution of scriptsProcess control can be nested with each other, or they can nest themselvesJudging result execution according to condition condition---------------