sudo sumkdir -p /usr/lib/jvmchmod -R 777 /usr/lib/jvmmv /tmp/jdk-8u121-linux-x64.tar.gz /usr/lib/jvm/tar -zxvf /usr/lib/jvm/jdk-8u121-linux-x64.tar.gz -C /usr/lib/jvmvim /etc/profileexport JAVA_HOME=/usr/lib/jvm/jdk1.8.0_121 export JRE_HOME=${JAVA_HOME}/jre export CLASSPATH=.:${JAVA_HOME}/lib:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATHsource /etc/profile
如果电脑重启失效
将JDK的bin路径和jre的bin路径手动追加到/etc/bashrc
export PATH=(原有环境变量....其后追加，注意冒号分隔哦) :/usr/jdk/bin:/usr/jdk/jre/bin
vi /etc/bashrc
JAVA_HOME=/usr/lib/jvm/jdk1.8.0_121
export PATH=$JAVA_HOME/bin:$JAVA_HOME/jre/bin:$PATH:$HOMR/bin
source /etc/bashrc
