# A Basic UNIX Overview

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## A Basic UNIX Overview

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A Basic UNIX Overview Asriel UNIX FOR DOS ADDICTED WaReZ PuPPieZ AND THEIR PETS Introduction

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## Nội dung Text: A Basic UNIX Overview

1. A Basic UNIX Overview Asriel UNIX FOR DOS ADDICTED WaReZ PuPPieZ AND THEIR PETS 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
10. $Oh, just so you know, the$ prompt denotes root access. Good deal, huh? In general, if you have right privs to an SUID file, copy it to your own directory and cat /bin/sh into it. You now have an instant gateway to the account of the owner of that file. If you want to find files that you can do this with, try this out: #find / -user root -perm -4000 -exec /bin/ls -al {} ";" This will give you a list of all root owned SUID files. If you want more info on the 'find' command, just 'man find'. Well, I'm overdo for an appointment on the IRC in #warez... so I'll cut off here. I hope I've been of assistance to you. ---------------------------------------------------------------------------- ACTUAL ARTICLE ENDS HERE... Please feel free to save an extra 1k of file space and invoke the DOS EDIT CUT command at the dotted line. Do not remove the rest of this article on penalty of law. S00P3R GR00P-3SQU3 GR33TZ / +HANX Greets go out to Nowhere Man, INC, THG, UNT, SaD, SoD, PTA, SOB Thanks to... ________________________ your ad here Current DWE Akshul M3mbre Boards: Nitro Burnin' Funny Cars WHQ/DWEnet HOST (312)582-1115 The Prodigal Sun CHQ/MECCA (312)238-3585 Dark Waters HQ/Infosite (312)667-0222 PyroTechnics II Infosite (708)991-9403 DWE M3/\/\B3R LiST President and Dictator for Life: Xanax Head Courier/Warez Cracker: Asriel Head Fisherman/Trout Expert: Changeling Head Person That Gets Asriel Free CDs: Monk Head Person That Gets DWE Members Free WaReZ: Pyro