如何在Ubuntu上面安装LAMP环境

第一步：安装Apache

先更新一下还是有必要的对吧？
sudo apt-get update
sudo apt-get install apache2

就这么简单，完了！检查一下是不是安装成功：直接在浏览器里面输入VPS的IP看看，是不是有”“It works!"“类似的东西出现？有，那就可以了！
不知道自己的ip？ 试试：ifconfig eth0 | grep inet | awk '{ print $2 }'

第二步：安装MySQL

sudo apt-get install mysql-server libapache2-mod-auth-mysql php5-mysql

在MySQL安装期间会让你输入MySQL的root密码，如果你错过了那也没关系后面可以在shell里面修改。

启动MySQL： 安装完成后我们输入sudo mysql_install_db 就启动了

技术MySQL的设置脚本：
sudo /usr/bin/mysql_secure_installation

接下来提示让你输入root密码：
Enter current password for root (enter for none):
OK, successfully used password, moving on...

接下来会提示你是否需要修改密码，我么这里选择N，继续下面的步骤。接下来就是最简单的输入yes和no了，知道MySQL重启：
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
production environment.

Remove anonymous users? [Y/n] y
... Success!

Normally, root should only be allowed to connect from 'localhost'. This
ensures 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 can
access. This is also intended only for testing, and should be removed
before 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 far
will take effect immediately.

Reload privilege tables now? [Y/n] y
... Success!

Cleaning up...

上面这就完成了MySQL，接下来我们来搞PHP。

第三步，安装PHP

输入 sudo apt-get install php5 libapache2-mod-php5 php5-mcrypt

接下来在提示让你两次确定YES后，PHP就自己开始安装了。

设置个PHP目录下的default 文件也许对你有用（非必须）
sudo nano /etc/apache2/mods-enabled/dir.conf

加入：

DirectoryIndex index.php index.html index.cgi index.pl index.php index.xhtml index.htm

PHP有很多有用的组件什么的可以帮你：

输入
apt-cache search php5-

接下来会显示一大堆，大概像这样：
hp5-cgi - server-side, HTML-embedded scripting language (CGI binary)
php5-cli - command-line interpreter for the php5 scripting language
php5-common - Common files for packages built from the php5 source
php5-curl - CURL module for php5
php5-dbg - Debug symbols for PHP5
php5-dev - Files for PHP5 module development
php5-gd - GD module for php5
php5-gmp - GMP module for php5
php5-ldap - LDAP module for php5
php5-mysql - MySQL module for php5
php5-odbc - ODBC module for php5
php5-pgsql - PostgreSQL module for php5
php5-pspell - pspell module for php5
php5-recode - recode module for php5
php5-snmp - SNMP module for php5
php5-sqlite - SQLite module for php5
php5-tidy - tidy module for php5
php5-xmlrpc - XML-RPC module for php5
php5-xsl - XSL module for php5
php5-adodb - Extension optimising the ADOdb database abstraction library
php5-auth-pam - A PHP5 extension for PAM authentication
[...]

一旦你选定你需要安装的模块的话你只要输入类似这样的命令：
sudo apt-get install name of the module

你可以一次安装一个或者多个组件。

还想继续？没了！

第四步，在服务器上查看自己的PHP信息

创建个文件：sudo nano /var/www/info.php，在里面添加：
phpinfo();
?>
保存退出！

接下来重启Apache：
sudo service apache2 restart