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1. Introduction to file systems and permissions 2. Permission setting chmod 3. Advanced applications of find and chmod 4. End Today I saw a sentence:UNIX is very user-friendly. It's just picky who its friends are. 1. Introduction to file systems

Before discussing this part of the knowledge, the reader needs to know that hacking the site is illegal, but it is welcome to find the site's intrusion vulnerabilities on the network and notify the site. Why to look for an intrusion or intrusion,

Two security questions about UNIX Networks In recent years, many articles have successively introduced a so-called Secure UNIX shutdown user. The main idea is to add the/etc/shutdown command or the/etc/haltsys command at the end of the/etc/passwd

In fact, every hacker has its own unique method. The author has collected a lot of data to invade the website server, but because the actual situation is different, often causes many methods the invalidation; This shows that each site is different,

Article Title: Let Unix terminals move with users. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. In Windows,

Article Title: Killing processes that do not discipline Unix operating systems. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems,

Although there have been many articles on UNIX network security issues have been widely discussed, but with the progress of technology and people's understanding of security issues, always have security problems are exposed, and be amended. This

Although software engineers who design software for servers are trying to improve system security, hackers are often provided with intrusion opportunities due to varying levels of system administrators or security awareness. In fact, every hacker

The essence of Unix (Linux) C Programming Problems-general Linux technology-Linux programming and kernel information. The following is a detailed description. Some people think that the C language is outdated. for this question, the benevolent sees

This article describes how to use the shell language in SCO OpenServer5.0.5 to exchange information between processes:Use named pipes to exchange information between processesUse kill and trap statements to exchange information between processesUse