解压
[root@iZ2ze8dv3a3meoltm5u25oZ ~]# tar zxf jdk-8u151-linux-x64.tar.gz [root@iZ2ze8dv3a3meoltm5u25oZ ~]# mv jdk1.8.0_151 /usr/local/jdk1.8 [root@iZ2ze8dv3a3meoltm5u25oZ ~]# rm jdk-8u151-linux-x64.tar.gz
添加变量
cat >> /etc/profile<<EOF JAVA_HOME=/usr/local/jdk1.8/ JAVA_BIN=/usr/local/jdk1.8/bin JRE_HOME=/usr/local/jdk1.8/jre PATH=$PATH:/usr/local/jdk1.8/bin:/usr/local/jdk1.8/jre/bin CLASSPATH=/usr/local/jdk1.8/jre/lib:/usr/local/jdk1.8/lib:/usr/local/jdk1.8/jre/lib/charsets.jar EOF
使变量生效
[root@iZ2ze8dv3a3meoltm5u25pZ ~]# source /etc/profile
验证
[root@iZ2ze8dv3a3meoltm5u25pZ ~]# java -version java version "1.8.0_151" Java(TM) SE Runtime Environment (build 1.8.0_151-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.151-b12, mixed mode)
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