Linux(CentOS) 下安装 Java 运行环境

安装系统环境是： centos6.5 64 位

一.安装 jdk

**1.下载 java 文件 jdk-6u45-linux-x64.bin

2.运行./jdk-6u45-linux-x64.bin

3.移动该文件到/usr/local/jdk 目录下**
mv jdk-6u45-linux-x64 /usr/local/jdk

4.配置 java 环境变量,在文件/etc/profile 最后添加以下内容:
#set java
JAVA_HOME=/usr/local/jdk;export JAVA_HOME
JRE_HOME=/usr/local/jdk/jre;export JRE_HOME
PATH=PATH:JAVA_HOME/bin:$JRE_HOME/bin;export PATH
export CLASSPATH=CLASSPATH:PATH:JAVA_HOME/lib/rt.jar:JAVA_HOME/lib/dt.jar:JAVA_HOME/lib/tools.jar:JAVA_HOME/lib:$JRE_HOME/lib:.

**5.source /etc/profile (重新激活) **

6.运行 java -version 查看是否成功
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二.安装 tomcat

1.下载 tomcat 文件:apache-tomcat-7.0.47.tar.gz

**
2.解压 tar -zxvf apache-tomcat-7.0.47.tar.gz**

**
3.移动该文件到/usr/local 下,并命名为 tomcat**
mv apache-tomcat-7.0.47 /usr/local/tomcat

4.到 tomcat/bin 目录下 setclasspath.sh 文件中设置 java 环境,加入以下两行即可:
export JAVA_HOME=/usr/local/jdk
export JRE_HOME=/usr/local/jdk/jre

5.设置 tomcat 服务启动
把下面内容保存到/etc/init.d/目录,文件名为 tomcat
#!/bin/bash

/etc/rc.d/init.d/tomcat

init script for tomcat precesses

processname: tomcat by ton

description: tomcat is a j2se server

chkconfig: 2345 86 16

description: Start up the Tomcat servlet engine.

set -m** (有时不加这个，secureFX 会话失效时，会导致 tomcat 自动 stop)**
CATALINA_HOME="/usr/local/tomcat"
if [ -f /etc/init.d/functions ]; then
. /etc/init.d/functions
elif [ -f /etc/rc.d/init.d/functions ]; then
. /etc/rc.d/init.d/functions
else
echo -e "/atomcat: unable to locate functions lib. Cannot continue."
exit -1
fi

running tomcat services

RETVAL=$?
case "$1" in
start)
if [ -f $CATALINA_HOME/bin/startup.sh ];then
echo $"Starting Tomcat"
$CATALINA_HOME/bin/startup.sh
fi
;;
stop)
if [ -f $CATALINA_HOME/bin/shutdown.sh ];then
echo $"Stopping Tomcat"
$CATALINA_HOME/bin/shutdown.sh
fi
;;
restart)
if [ -f $CATALINA_HOME/bin/startup.sh ];then
echo $"Starting Tomcat"
$CATALINA_HOME/bin/startup.sh
fi
sleep 5
if [ -f $CATALINA_HOME/bin/shutdown.sh ];then
echo $"Stopping Tomcat"
$CATALINA_HOME/bin/shutdown.sh
fi
;;
*)
echo $"Usage: $0 {start|stop|restart}"
exit 1
;;
esac
exit $RETVAL

6.为该文件添加运行权限
chmod +x /etc/init.d/tomcat

三.安装 mysql

linux 下主要是编译安装,需准备:cmake 工具

**1.yum install gcc gcc-c++ ncurses-devel perl (安装编译源码所需的工具和库)

2.下载 cmake-3.0.1.tar.gz ,然后输入命令**:

tar -xzvf cmake-3.0.1.tar.gz
cd cmake-3.0.1
./bootstrap ; make ; make install

3.新增 mysql 用户组和用户命令:
groupadd mysql
useradd -r -g mysql mysql

4.新建 mysql 安装目录和存放数据目录:
mkdir -p /usr/local/mysql
cd /usr/local/mysql
chown -R mysql:mysql . (分配权限)

mkdir -p /var/mysqldata
cd /var/mysqldata
chown -R mysql:mysql . (分配权限)

5.下载 mysql-5.5.38.tar.gz ,解压:
tar -zxvf mysql-5.5.38.tar.gz
cd mysql-5.5.38(先进入目录下)

6.(先进入 mysql-5.5.38 目录下)再执行 cmake 命令:
cmake -DCMAKE_INSTALL_PREFIX=/usr/local/mysql
-DMYSQL_UNIX_ADDR=/var/mysqldata/mysql.sock
-DDEFAULT_CHARSET=utf8
-DDEFAULT_COLLATION=utf8_general_ci
-DWITH_EXTRA_CHARSETS:STRING=utf8,gbk
-DWITH_MYISAM_STORAGE_ENGINE=1
-DWITH_INNOBASE_STORAGE_ENGINE=1
-DWITH_MEMORY_STORAGE_ENGINE=1
-DWITH_READLINE=1
-DENABLED_LOCAL_INFILE=1
-DMYSQL_DATADIR=/var/mysqldata
-DMYSQL_USER=mysql
-DMYSQL_TCP_PORT=3306

7.再编译:
make
make install

8.复制配置文件,在/usr/local/mysql 下执行:
cp support-files/my-medium.cnf /etc/my.cnf

9 初始化数据库
执行前需赋给 scripts/mysql_install_db 文件执行权限
chmod 755 scripts/mysql_install_db
scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql/
--datadir=/var/mysqldata/

10. 设置 mysqld 的开机启动
cp support-files/mysql.server /etc/init.d/mysql
chmod 755 /etc/init.d/mysql
chkconfig mysql on

11.MySQL 配置环境变量
export PATH=/usr/local/mysql/bin:$PATH
alias mysql_start="mysqld_safe &"
alias mysql_stop="mysqladmin –u root -p shutdown"
source /etc/profile (重启配置)

12.启动 mysql 服务
/etc/init.d/mysql start

ps -ef |grep mysql (命令查看是否启动)

13. 登陆 mysql

mysql -u root –p

14.修改 MySQL 用户 root 的密码
mysqladmin -u root password '123456' (更新密码)**