When a novice/Xiaobai builds a website, he will encounter the situation that he needs help to modify the website code. For example, Weieis bought a program from his notebook. After the server is installed and running, there are several small problems that need to be modified. If he does not understand the code, he will contact the program author to modify it, and the other party will ask him to provide the ftp account password for modification. At this time, the security of the server is involved
