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ngA Basic UNIX Overview



Introduction ------------

One of the most common operating systems in existance is Unix. Unix exists in many different flavors, from Berkeley BSD to AT&T System V to SunOs. Basic working knowledge of Unix is almost essential to a hacker, as it is the system a hacker is most likely to come across. If you intend to use the internet at all, or to do any serious exploration of Telenet, the ability to navigate through Unix is a necessity. (Unix is also the single most interesting system in existance: it's just fun to fuck with). Unix Logins -----------

Most Unix logins look essentially the same. A general Unix login prompt looks something like this:

connected to five.finger.com login:

That first line is the system identifier. Although it's not at all essential to what you are doing, it's good to know what system you are attempting to log on to. The second line is what typically identifies the system you are on as Unix. Almost all Unix systems greet a user with the same prompt: login:. Well, there's not much to do in Unix from the outside, and Unix systems are typically fairly secure at this point. You may be able to obtain a list of users, or current users, by logging in as 'who', but other than that there are few functions available here. Unless you are on the internet, or have accounts specifically for the specific machine you are on, the only way on to the system is to try the default passwords. What are the default passwords? Unix systems come installed with certain passwords automatically. In addition, some accounts must exist on a system. One such account is 'root'. This user is the divine Kami of the Unix system... in short, an all access pass. Unfortunately,…...

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