Export
steps:
1) mysqldump -u web_user -p databasename > sqlfilename
2) Prompts you to enter Password:
3)Enter the password then the database will be backup on given sqlfile
Import
mysqldump -u web_user -p database_name < sqlfilename

For Example, if we want to sent email to zulfan@kebo.vlsm.org,  frist, we must know about MX for this domain :
# host -t mx kebo.vlsm.org
kebo.vlsm.org mail is handled by 10 kebo.vlsm.org.
# telnet kebo.vlsm.org 25
Trying 202.154.187.9…
Connected to surobuaya.vlsm.org.
Escape character is ‘^]’.
220 howie.eepis-its.edu ESMTP Postfix (Debian/GNU)
And then named of  the sender :
MAIL FROM: <zulfan_hakim@yahoo.com>
250 2.1.0 Ok
If you don’t [...]

Configuring Apache for Maximum Performance
1 Introduction
Apache is an open-source HTTP server implementation. It is the most popular web server on the Internet; the December 2005 Web Server Survey conducted by Netcraft [1] shows that about 70% of the web sites on Internet are using Apache.
Apache server performance can be improved by adding additional hardware resources [...]