Programmer Group

In large Linux applications, such as Web Clustering, Distributed Computing, and so on, servers often do not have CD-ROM drives. In this case, how can you quickly install the system for hundreds of server bare machines?The traditional installation methods such as USB CD-ROM, mobile hard disk, etc. are obviously out of order, so it needs to be - ...

1. Brief introduction Internet is full of all kinds of network services. When providing network services to the outside world, the server and the client need to follow the same set of data communication protocols in order to communicate normally; just like you communicate with Taiwanese in Minnan and Cantonese in Cantonese. When implementing i ...

Recently, a requirement has been addressed, probably as follows: Setting up FTP Server Upload files to the specified directory (assuming directory A) to the server We need to parse and update the uploaded files (files in the uploaded state can not be processed) to the database. We only have the right to "read" directory A, that is, ...

Experimental purpose: Using software to achieve network batch automatic installation Experimental environment: one linux desktop, more than one new virtual machine, in the same local area network Experimental steps: 1. Install software dependency packages on desktop systems [root@localhost ~]# yum -y install dhcp tftp tftp-server vsftpd s ...

1. Why use cURL In order to get web content, we can use file_get_contents, file, readfile and other functions, but they lack flexibility and effective error handling. Moreover, some difficult tasks can not be accomplished, such as processing coockies, validation, form submission, file upload and so on. More ways for PHP to get web content: htt ...

Original address: https://my.oschina.net/jarly/blog/898144 When you first pick up your hands and use the awk command to process one or more files on your computer, it reads each line of the file in turn, and then processes it. The awk command defaults to getting the file content from stdio standard input. awk uses a pai ...

Curl command is a file transfer tool that uses URL rules to work on the command line. It supports the upload and download of files, so it is a comprehensive transmission tool, but according to tradition, curl is customarily called the download tool. It supports many protocols including HTTP, HTTPS, ftp, etc. It also supports POST, cookies, aut ...

        Hydra Hydra's Violent Password Cracking Tool is quite powerful, supporting online password cracking for almost all protocols. Whether the password can be cracked or not depends on whether the dictionary is strong enough for social engineering penetration to sometimes achieve twice the result with half the effort.This article onl ...

I. Brief Introduction Many times we need to use some validation methods. Sometimes when we need to use regular expressions to validate data, we often need to go to the Internet for a long time, and the results are not quite what we want. So I share my checking help class, share it here, leave a bottom for myself, and also give you a reference f ...

I'm ashamed that I haven't studied well for half a year. Six months ago, I thought about how I would do if I were asked to make a game chat module. Although I have some ideas, I just want to think about it. Now, use your spare time to achieve it. Affected by the work, I also want to define all defines and referenced header files in one file: ...