Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
How come I can echo a tty device by doing "echo hello > /dev/tty1", but I can't cat a tty device? If I try to do a "cat /dev/tty1" in tty2 for example I don't see the output of tty1. I'm doing this as root by the way. I can see how this may be a security thing but root should be able to do anything?
Lets say I log into X from tty1 using startx. I then go into an X session. Now I go to tty2 and type startx -- :1 and start anothr X session. alt F7 and alt F8 are my X session. What is the equivalent tty devices created on F7 and F8?
Now while I'm in X I start up xterm. The device now is /dev/pts/1. What type of terminal is this and what relation does it have to the reguler tty's?
While I'm in xterm I would like to see the logging output of X and the window manager going to tty1. How come "cat /dev/tty1" doesn't give the desired results? How can I redirct all output going to tty1 to /dev/pts/1?
I know I can "startx > xlog 2>&1" and then go to any terminal and do a "tail xlog" but this is not what i'm looking for. This is not really what I'm looking for.
Doesn't all input and output of a terminal go throught the tty device? So shouldn't cat tty just show you everything going in and out?