linux下安装java环境

安装系统环境是： centos6.5 64位 

一.安装jdk
*如果linux上没安装ftp,是无法上传软件的,先执行以下命令:
yum install -y vsftpd 
/etc/init.d/vsftpd start 

//假设传不了文件先安装lrzsz：
yum -y install lrzsz
rz   将资料开始上传

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


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)