Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
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.
Telnet is rather primitive yes, but it has its uses. In embedded systems, where size is important, telnet is a useful alternative to ssh, which would be prohibitively large. Of course, in these places you also see things like xmodem and tftp.
On PC's tho, yea, telnet is a rather inferior alternative to ssh.
If you want to know what security measures does TELNET implement: none at all. The protocol is as plain and transparent as it can be.
If you mean "how to harden it", then I can't help. I never bothered really. There are better protocols around.
I consider it useful only for local stuff, overall when you need to connect to do fix something. It's useful to fix routers and things like that. I also use it sometimes to connect to mldonkey on my LAN server
Telnet is essentially obsolete at this point. Many (all?) distros do not even come with a telnet server installed. Telnet has been replaced with SSH. Where as all data passed between client and server with telnet is plain-text, I.E. readable from any one able to capture the packets; all SSH data is encrypted.
Similarly FTP is obsoleted by SFTP which uses the same SSH encryption with File Transfer Protocol on top.