配置LAMP环境

https://www.digitalocean.com/community/articles/how-to-install-linux-apache-mysql-php-lamp-stack-on-centos-6

About LAMP

---

LAMP stack is a group of open source software used to get web servers up and running. The acronym stands for Linux, Apache, MySQL, and PHP. Since the server is already running CentOS, the linux part is taken care of. Here is how to install the rest. 

Set Up

The steps in this tutorial require the user on the virtual private server to have root privileges. You can see how to set that up in the Initial Server Setup Tutorial in steps 3 and 4. 

Step One—Install Apache

---

Apache is a free open source software which runs over 50% of the world’s web servers. 

To install apache, open terminal and type in this command:

sudo yum install httpd

Configure httpd.conf

vi /etc/httpd/conf/httpd.confline 277: ServerName yourip:80line 339: AllowOverride All 

Once it installs, you can start apache running on your VPS:

sudo service httpd start

That’s it. To check if Apache is installed, direct your browser to your server’s IP address (eg. http://12.34.56.789). The page should display the words “It works!" like this.

How to find your Server’s IP address

---

You can run the following command to reveal your server’s IP address.

ifconfig eth0 | grep inet | awk '{ print $2 }'

Step Two—Install MySQL

---

MySQL is a powerful database management system used for organizing and retrieving data on a virtual server 

To install MySQL, open terminal and type in these commands:

sudo yum install mysql-serversudo service mysqld start

During the installation, MySQL will ask you for your permission twice. After you say Yes to both, MySQL will install. 

Once it is done installing, you can set a root MySQL password:

sudo /usr/bin/mysql_secure_installation

The prompt will ask you for your current root password. 

Since you just installed MySQL, you most likely won’t have one, so leave it blank by pressing enter.

Enter current password for root (enter for none): OK, successfully used password, moving on...

Then the prompt will ask you if you want to set a root password. Go ahead and choose Y and follow the instructions. 

CentOS automates the process of setting up MySQL, asking you a series of yes or no questions. 

It’s easiest just to say Yes to all the options. At the end, MySQL will reload and implement the new changes.

By default, a MySQL installation has an anonymous user, allowing anyoneto log into MySQL without having to have a user account created forthem.  This is intended only for testing, and to make the installationgo a bit smoother.  You should remove them before moving into aproduction environment.Remove anonymous users? [Y/n] y                                             ... Success!Normally, root should only be allowed to connect from 'localhost'.  Thisensures that someone cannot guess at the root password from the network.Disallow root login remotely? [Y/n] y... Success!By default, MySQL comes with a database named 'test' that anyone canaccess.  This is also intended only for testing, and should be removedbefore moving into a production environment.Remove test database and access to it? [Y/n] y - Dropping test database... ... Success! - Removing privileges on test database... ... Success!Reloading the privilege tables will ensure that all changes made so farwill take effect immediately.Reload privilege tables now? [Y/n] y ... Success!Cleaning up...All done!  If you've completed all of the above steps, your MySQLinstallation should now be secure.Thanks for using MySQL!

Step Three—Install PHP

---

PHP is an open source web scripting language that is widely used to build dynamic webpages.

To install PHP on your virtual private server, open terminal and type in this command:

sudo yum install php php-mysql php-mbstring

Once you answer yes to the PHP prompt, PHP will be installed. 

PHP Modules

---

PHP also has a variety of useful libraries and modules that you can add onto your server. You can see the libraries that are available by typing:

yum search php-

Terminal then will display the list of possible modules. The beginning looks like this:

php-bcmath.x86_64 : A module for PHP applications for using the bcmath libraryphp-cli.x86_64 : Command-line interface for PHPphp-common.x86_64 : Common files for PHPphp-dba.x86_64 : A database abstraction layer module for PHP applicationsphp-devel.x86_64 : Files needed for building PHP extensionsphp-embedded.x86_64 : PHP library for embedding in applicationsphp-enchant.x86_64 : Human Language and Character Encoding Supportphp-gd.x86_64 : A module for PHP applications for using the gd graphics libraryphp-imap.x86_64 : A module for PHP applications that use IMAP

To see more details about what each module does, type the following command into terminal, replacing the name of the module with whatever library you want to learn about.

yum info name of the module

Once you decide to install the module, type:

sudo yum install name of the modulefor example: we need php-mbstring sometimes.sudo yum install php-mbstring

You can install multiple libraries at once by separating the name of each module with a space.

Configuration your php.ini

locate php.ini (if you can't use locate command ,you need to run sudo updatedb firstly)we need to configure these parameters:timezone

Congratulations! You now have LAMP stack on your droplet!

We should also set the processes to run automatically when the server boots (php will run automatically once Apache starts):

sudo chkconfig httpd onsudo chkconfig mysqld on

Step Four—RESULTS: See PHP on your Server

---

Although LAMP is installed on your virtual server, we can still take a look and see the components online by creating a quick php info page

To set this up, first create a new file:

sudo nano /var/www/html/info.php

Add in the following line:

<?phpphpinfo();?>

Then Save and Exit. 

Restart apache so that all of the changes take effect on your virtual server:

sudo service httpd restart

Finish up by visiting your php info page (make sure you replace the example ip address with your correct one): http://12.34.56.789/info.php

It should look similar to this.

See More

After installing LAMP, you can go on to do more with MySQL (A Basic MySQL Tutorial),Create an SSL Certificate, or Install an FTP Server.