CentOS 7 安装jdk，centos安装jdk

CentOS 7 安装jdk，centos安装jdk

查看系统版本

[root@zabbix ~]# cat /etc/redhat-release 
CentOS Linux release 7.1.1503 (Core) 
[root@zabbix ~]# uname -a
Linux zabbix.com 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

下载jdk包，这里我选择的是oracle的java tar.gz包

http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
然后可以用wget 命令下载。如果没有wget命令的话yum install wget -y

开始安装jdk，首先解压

tar -xf jdk-8u65-linux-x64.gz /usr/local/
ln -s /usr/local/jdk1.8.0_65 /usr/local/java/

添加环境变量

[root@zabbix ~]#vim /etc/profile.d/java.sh
JAVA_HOME=/usr/local/java
JAVA_BIN=$JAVA_HOME/bin
JRE_HOME=$JAVA_HOME/jre
JRE_BIN=$JRE_HOME/bin
CLASSPATH=$JAVA_HOME/jre/lib:$JAVA_HOME/lib:$JAVA_HOME/jre/lib/charsets.jar
PATH=$PATH:$JAVA_BIN:$JRE_BIN:$CLASSPATH

查看是否安装成功

[root@zabbix ~]# java -version
java version "1.8.0_65"
Java(TM) SE Runtime Environment (build 1.8.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 25.65-b01, mixed mode)

如果机器本身自带了jdk需要自己先行卸载。以免后面影响。