先安装JDK
下载jdk：
mv jdk-7u21-linux-x64.tar.gz\?AuthParam\=1366529379_f7fe2af81268eee41771542b3191968c jdk-7u21-linux-x64.tar.gz
tar -xf jdk-7u21-linux-x64.tar.gz
设置PATH，比如我的～/.bash_profile:
# .bash_profile
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
JAVA_HOME=$HOME/software/jdk1.7.0_21
CLASSPATH=.:$JAVA_HOME/lib/tools.jar
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME CLASSPATH PATH
# Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi
# User specific environment and startup programs
JAVA_HOME=$HOME/software/jdk1.7.0_21
CLASSPATH=.:$JAVA_HOME/lib/tools.jar
PATH=$PATH:$HOME/bin:$JAVA_HOME/bin
export JAVA_HOME CLASSPATH PATH
测试是否安装成功：
echo $JAVA_HOME
echo $PATH
安装jdk完成
---------------
安装mysql
安装mysql-server
偷个懒，直接使用yum安装
sudo yum install mysql-server
sudo yum install mysql
sudo service mysqld start
设置mysql root账号的密码：
sudo mysql
set password for 'root'@'localhost' = PASSWORD('XXXXX');
设置开机自启动
sudo chkconfig --levels 345 mysqld on
安装mysql完成
-------------
安装tomcat
偷个懒，使用yum安装
sudo yum install tomcat6
sudo yum install tomcat6-webapps
sudo yum install tomcat6-admin-webapps
sudo service tomcat6 start
安装tomcat完成
