I have developed a web site using lamp (localhost). I want to know how to upload it and host it in a linux server.
(how to upload the database using terminal).

Well you can upload the physical data using SCP. Unless you need to use the data from development then you shouldn't need to transfer the database just the queries used to create it. If you need the data then export it from the database you are using (MySQL? it would help people to help you if they know what you used) and then import it to the servers database. Overall their isn't much here to help since we don't know what you are actually using. However Apache is simple enough to set-up so once you transfer your files and set-up the hosts in the configuration file it should work fine other then the database what may need more work.

I'm sorry I didn't knew how to ask the question. so i forgot to mention it properly.
I used mysql.What I want to know is how to upload the database using a terminal.(If we used phpmyadmin like tool we can export the database and import it. How can we do it with terminal).

There are many ways to transfer files to another computer......I typically just use ftp.

Dump your mysql database in a file. Upload this file to the server and import the file here.

PhpMyAdmin can help you to dump/download/upload/import the data.