Most distributions of Linux would allready have a webserver included. Like Fedora Core x, Debian and so forth. Most likely would this be Apache. To make sure it is running, type "service httd restart", then find the webserver root folder. I have Oracle installed, so it is located in /u01/app/oracle/product/10.1.0/db_2/Apache/Apache/htdocs/ , but if you locate the htdocs folder using command "locate htdocs" you most probably find it somewhere in the list (not sure if the home directory for Apache 2 is called www or wwwhome or something else?? (I still have version 1.3)) You could also maybe find it by locating the index file by using "locate index.htm" command.
Anyway. Once you have found it, but a file called, say "hello.htm" in it with, say, following text:
And try if you can find it in a browser using
<your ip>/hello.htm or sometimes the default port 80 is not used, so then you have to type
<your ip>:<port used>/hello.htm
This guide is for absolute beginners though....