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This article follows up on Linux extraction command grep (I) and Linux extraction command grep (II) and continues to introduce the options of the grep command and its usage. Option 3 -i is case insensitive to the search string $ grep Mail /...

This article follows up on Linux extraction command grep (Part 1) and continues to introduce the options and usage of the grep command. Option 2 In this group, we mainly introduce options to control grep output information. -m stops outputt...

Grep is a frequently used command in Linux. Like the cut command, it is a member of the pipeline command. Its function is to analyze a line of data and extract the data we want from the analyzed data. It is equivalent to a search function....

The cut command belongs to the pipeline command family. Cut is an extraction command that extracts the data we want after analyzing a piece of data. Generally, information is extracted line by line. The meaning of cut is to cut. Yes, the pu...

NodeJs can automatically restart after modifying the code, saving us the trouble of ctr+c and then using node. But in terms of time, if the project is already online and running normally, and there are not many modifications, then we can do...

When compiling a PHP module, errors may occur if there are any omissions. Here is a summary of the errors that occurred during the compilation of the PHP module curl. curl can be said to be a commonly used module in PHP. However, in many ca...

In the article "Building SVN Service Project and Synchronizing Code to Project Directory" , we briefly introduced how to use SVN to synchronize submitted code to the working directory. But there is a problem here, that is, the SVN service a...

Scp copies files between two hosts over the network, and the data is encrypted during transmission. Its underlying layer uses ssh for data transmission. And it has the same authentication mechanism and the same security level as ssh. When u...

Since we want to delete the files under the directory regularly, we need to use the Linux crontab command. And the content format of each work routine is also introduced in the format of each crontab work. Similarly, we need to use shell sc...

Compared with at , which executes a command only once, crontab, which we are going to talk about in this article, executes the set commands in a loop. Similarly, the use of crontab requires the support of the crond service. The service is s...

In shell script programming, predicates are often used. There are two ways to use predicates, one is to use test, and the other is to use []. Let's take a look at how to use these two methods through two simple examples. Example 1 # test –...

? is a special variable. This variable represents the return value of the previous command. That is to say, when we run certain commands, these commands will return a code after running. Generally, if the command is successfully run, the re...

In Linux, the best editor should be vim. However, the complex commands behind vim's powerful functions also make us daunted. Of course, these commands do not need to be memorized by rote. As long as you practice using vim more, you can reme...

A lot of software found today is in the tar.xz format, which is a lossless data compression file format that uses the LZMA compression algorithm. Like gzip and bzip2, it supports multiple file compression, but the convention is not to compr...

As the most commonly used web server, Apache can be used in most computer operating systems. As a free and open source Unix-like operating system, Linux and Apache are a golden pair. This article will introduce the installation and use of A...