From 75a4a592e5ccda30715f93563d741b83e0dcf39e Mon Sep 17 00:00:00 2001 From: Patrick J Volkerding Date: Mon, 25 Apr 2011 13:37:00 +0000 Subject: Slackware 13.37 Mon Apr 25 13:37:00 UTC 2011 Slackware 13.37 x86_64 stable is released! Thanks to everyone who pitched in on this release: the Slackware team, the folks producing upstream code, and linuxquestions.org for providing a great forum for collaboration and testing. The ISOs are off to be replicated, a 6 CD-ROM 32-bit set and a dual-sided 32-bit/64-bit x86/x86_64 DVD. Please consider supporting the Slackware project by picking up a copy from store.slackware.com. We're taking pre-orders now, and offer a discount if you sign up for a subscription. As always, thanks to the Slackware community for testing, suggestions, and feedback. :-) Have fun! --- slackbook/html/basic-network-commands-telnet.html | 173 ++++++++++++++++++++++ 1 file changed, 173 insertions(+) create mode 100644 slackbook/html/basic-network-commands-telnet.html (limited to 'slackbook/html/basic-network-commands-telnet.html') diff --git a/slackbook/html/basic-network-commands-telnet.html b/slackbook/html/basic-network-commands-telnet.html new file mode 100644 index 000000000..736a26486 --- /dev/null +++ b/slackbook/html/basic-network-commands-telnet.html @@ -0,0 +1,173 @@ + + + + +telnet + + + + + + + + + +
+ + + + + + + + + + +
Slackware Linux Essentials
PrevChapter 13 Basic Network CommandsNext
+ +
+
+ +
+

13.5 telnet

+ +

Someone once stated that telnet(1) was the coolest thing he +had ever seen on computers. The ability to remotely log in and do stuff on another +computer is what separates Unix and Unix-like operating systems from other operating +systems.

+ +

telnet allows you to log in to a computer, just as if you +were sitting at the terminal. Once your username and password are verified, you are given +a shell prompt. From here, you can do anything requiring a text console. Compose email, +read newsgroups, move files around, and so on. If you are running X and you telnet to another machine, you can run X programs on the remote +computer and display them on yours.

+ +

To login to a remote machine, use this syntax:

+ + + + + +
+
+% telnet <hostname>
+
+
+ +

If the host responds, you will receive a login prompt. Give it your username and +password. That's it. You are now at a shell. To quit your telnet session, use either the +exit command or the logout command.

+ +
+ + + + + +
Warning +

telnet does not encrypt the information it sends. Everything +is sent in plain text, even passwords. It is not advisable to use telnet over the Internet. Instead, consider the Secure Shell. It encrypts all traffic and is available for free.

+
+
+ +
+

13.5.1 The other use of telnet

+ +

Now that we have convinced you not to use the telnet protocol anymore to log into a +remote machine, we'll show you a couple of useful ways to use telnet.

+ +

You can also use the telnet command to connect to a host on a +certain port.

+ + + + + +
+
+% telnet <hostname> [port]
+
+
+ +

This can be quite handy when you quickly need to test a certain service, and you need +full control over the commands, and you need to see what exactly is going on. You can +interactively test or use an SMTP server, a POP3 server, an HTTP server, etc. this +way.

+ +

In the next figure you'll see how you can telnet to a HTTP +server on port 80, and get some basic information from it.

+ +
+

Figure 13-1. Telnetting to a webserver

+ + + + + +
+
+% telnet store.slackware.com 80
+Trying 69.50.233.153...
+Connected to store.slackware.com.
+Escape character is '^]'.
+HEAD / HTTP/1.0
+
+HTTP/1.1 200 OK
+Date: Mon, 25 Apr 2005 20:47:01 GMT
+Server: Apache/1.3.33 (Unix) mod_ssl/2.8.22 OpenSSL/0.9.7d
+Last-Modified: Fri, 18 Apr 2003 10:58:54 GMT
+ETag: "193424-c0-3e9fda6e"
+Accept-Ranges: bytes
+Content-Length: 192
+Connection: close
+Content-Type: text/html
+
+Connection closed by foreign host.
+%
+
+
+
+ +

You can do the same for other plain-text protocols, as long as you know what port to +connect to, and what the commands are.

+
+
+ +
+
+ + + + + + + + + + + + +
PrevHomeNext
fingerUpThe Secure shell
+
+ + + -- cgit v1.2.3