centos 安装jdk1.8 mysql

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#卸载

查看已经安装的jdk

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[root@bogon jre]# rpm -qa|grep jdk
java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64
java-1.7.0-openjdk-1.7.0.91-2.6.2.3.el7.x86_64
java-1.7.0-openjdk-headless-1.7.0.91-2.6.2.3.el7.x86_64
java-1.8.0-openjdk-1.8.0.65-3.b17.el7.x86_64

卸载命令

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[root@bogon jre]# yum -y remove java-1.8.0-openjdk-headless-1.8.0.65-3.b17.el7.x86_64

卸载完成之后Java命令不被识别

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[root@bogon lib]# java -version
bash: java: command not found...

#安装

去官网下载jdk：http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
解压到安装目录

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[root@bogon software]# tar -zxvf jdk-8u101-linux-x64.tar.gz -C /usr/local/java/

安装完毕之后在/etc/profile文件末尾添加

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[root@bogon software]# vim /etc/profile
export JAVA_HOME=/usr/local/java/jdk1.8.0_101
export JRE_HOME=${JAVA_HOME}/jre
export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib
export PATH=${JAVA_HOME}/bin:$PATH

使/etc/profile生效

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[root@bogon jdk1.8.0_101]# source /etc/profile

检测安装是否成功

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[root@bogon jdk1.8.0_101]# java -version

mysql

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http://blog.csdn.net/z13615480737/article/details/78906598