On-line has many net friends to ask such question: Is actually the website main page how black? How do the hackers are invade the server?  
     Before discussing this part of knowledge, the reader needs to know that - - invades the website is illegal; But found the website in the network the invasion crack and informs this website to receive welcome. Why can seek for the invasion crack like this or invade which, famous hacker H ackalot had said “invades the website is the knowledge which the use studies studies the new knowledge one means”, this was also the Chinese often says “wengu knows newly”.  

[principle]  
     Although designs software's software engineers for the server to do everything possible to enhance system's security, however, because system manager's level irregular or under safety consciousness, often has provided the invasion opportunity to the hacker.  

     Actually each hackers have the original method. The author regarding invaded the website server's acquisition of information to be many, but because of actual situation's difference, often created many methods the expiration; Thus it can be seen, each website's situation is different, needs the intruder to differentiate the treatment. The supposition Shenzhen's line many which is friends with compared to Beijing's line, thus has given dictionary exhaustion very big convenient, Shenzhen users may depend upon this superiority online attack password, needed primordial consideration other means as Beijing's users. In view of these many invasion method, author refers to Mr. H ackalot this hacker celebrity's article to everybody to introduce that invades website the basic step.  
     Analyzes part of main pages by the black instance to be possible to discover that uses the intruder most to crave in invades the Web server and the FTP server, because this is on the other hand the simple two ways. In the supposition reader system and the WEB SERVER knowledge not once understood to U the NIX in the situation, the author gives the following step. 

First, the understanding must invade system  
     Now in the network serves as server's operating system take UNIX and Linux as the mainstream, if must invade these systems to have an understanding to them.  
Major part the instruction which uses on DOS on UNIX and Linux has the corresponding instruction (, because early dos development has profited from UNIX), the dos instruction which the following lists when uses SHELL account number (shell account) the most main some instructions corresponds:  
HELP=HELP  
CP=COPY  
MV= MOVE  
LS= DIR  
RM =DEL  
CD=CD  
     Must look that at the same time who also the user can enter the WHO instruction on this system, must know that on the system some user's material, may enter FINGER. These basic UNIX instruction may let you obtain you to use system's information.