Shell

A simple shell script to find out if a critical service is running and is suitable for Linux or UNIX operating systems.The script can also send notifications using e-mail. Code: Copy Code code as follows: #!/bin/bash #

When the server pressure is larger, running very laborious time. We often do Site page optimization, will go to find those pages are more frequent, and more time-consuming. Find the addresses that are high and time-consuming, and the related

Timer_poll.h Copy Code code as follows: /* * File:timer_poll.h * Author:administrator */ #ifndef Timer_poll_h#define Timer_poll_h#include #include #include #include #include #include #include #include #include #include #include

Create 500,000 files first Copy Code code as follows: Test for I in $ (seq 1 500000) For> do for> echo Test >> $i. txt For> Done 1 RM Copy Code code as follows: Test Time Rm-f * Zsh:sure you want to

1. Preface Time is very important to the operating system, from the kernel level to the application layer, the time expression and precision of the same. The Linux kernel uses a constant named Jiffes to compute the timestamp. Application layer has

Linux hardware devices in the/dev directory, the optical drive is one of them./dev/cdrom represents the optical drive, the method of mounting the optical drive is as follows (in root): Copy Code code as follows: Mkdir/mnt/cdrom

1.CD-The function is to quickly switch to the previous directory , as follows: Copy Code code as follows: amosli@amosli-pc:~$ CD learn/fd/ amosli@amosli-pc:~/learn/fd$ CD- /home/amosli 2.dirs: Display the directory stack,

1.ls-d * Copy Code code as follows: amosli@amosli-pc:~$ ls-d * %appdata% Develop many Sorted.txt workspace Bank Documents Music Space Download 2. Find.-type d-maxdepth 1 If you do not add-maxdepth parameters, then

Category: Programs WshShell objects ProgID Wscript.Shell FileName Wshom.ocx CLSID f935dc22-1cf0-11d0-adb9-00c04fd58a0b IID f935dc21-1cf0-11d0-adb9-00c04fd58a0b The following table describes the properties associated with the WshShell

On the internet to see this single flow of the script, very good. Copy Code code as follows: #!/bin/sh Usage () { echo "Usage: $ [i INTERFACE] [-S INTERVAL] [-C COUNT]" Echo echo "-I INTERFACE" echo "The interface to monitor, and

As a Linux SA, many parts of the day-to-day operation of the script, and the server's IP is generally static IP or Mac binding, of course, the latter is relatively cumbersome to operate, and the former we can set the host name, IP information,

Do unix/linux under the development, scripting skill is indispensable, as Shell programming, is also a profound technical field, here in order to learn, write a simple IP address is the legal micro-script program, this small program is also very

Because I've been working on some JSON data formats recently, I finally found JQ this great tool after a search. JQ allows you to manipulate JSON directly under the command line, including slicing, filtering, converting, and so on.Let's use a few

The general shell script debugging is basically echo to deal with the larger script when, it is more trouble, out of the question, is not very good to locate which line of code problems.In fact, some of the variables built into the shell can be a

1. Operator (let marker) + Addition-Subtraction* Multiplication/Division* * Power operation3 Let "z=5**3"% modulobash$ Expr 5% 3 2. The comparison character (note [] and the variable need Space "") Integral type comparison character-eq equals,

The code is as follows: Copy Code code as follows: #! /bin/bash function Read_file () { For line in ' cat $ ' Todo If [' Echo $line |grep ' ^[a-za-z0-9_-]*@[a-za-z_-]*\.[ a-za-z_-]*$ "'];then echo $line >> Result.txt Else

There are a lot of ways, and here are three ways to write: Writing a: Copy Code code as follows: #!/bin/bash While Read line Todo Echo $line Done Writing two: Copy Code code as follows: #!/bin/bash Cat

Recently more busy, for a long time did not update the blog, today is not busy writing a traffic monitoring script. The test has passed under the CentOS, has the need friend to try, has the bug or needs to add other function words can leave a

Because of the study of PHP, I also installed a XAMPP integrated environment package under Linux. But every time you start to enter the terminal, and then point Open/opt/lampp/, then sudo to perform manager-linux-x64.run operation, to open the XAMPP

Today on the Internet to see a web connection average time of the shell command, in their own machine tried, found that can not use, incredibly appear awk:fatal:division by zero attempted such a mistake, Mao's own changed the shell command.