cron linux command?

Question

and how create domain name

Answer 1

The Cron command is a timed command. you set items to happen on a recurring basis and then using cron they will run.
To get started try these articles
http://www.unixgeeks.org/security/newbie/unix/cron-1.html

http://www.scrounge.org/linux/cron.html

http://www.4webhelp.net/tutorials/misc/cron.php

Or consult the manual pages on your distro.
There simply is way to much to cron to explain here.

You create a domain name by registrering one with a REGISTRAR. Like Networksolutions (expensive), Aitdomains, Domains410 etc.

Once you have a registered domain you can create a server for it and call the server anything you like
server1.mydomain.com (assuming you registrered "mydomain.com")

If the server is just for "LOCAL" use you can make up any domain name and just use it. It goes in several files depending on your distribution of linux.
Here is a how to guide for setting up a web server
http://www.yolinux.com/TUTORIALS/LinuxTutorialWebSiteConfig.html
And here is one for domain setup
http://www.linux.com/base/ldp/howto/Domain-2.html

Answer 2

Domain names are created by registering them with internic. The cron command is a command to automaticly run programs at specified times.

Type "man cron " for more information