Centos7配置JAVA

定位JDK安装路径

终端输入

which java

终端输出

[root@iZ8vb2e3mzflkvty6k7eraZ agent-2.4.0-release]# which java /usr/bin/java

终端输入

ls -lrt /usr/bin/java

终端输出

[root@iZ8vb2e3mzflkvty6k7eraZ agent-2.4.0-release]# ls -lrt /usr/bin/java lrwxrwxrwx 1 root root 22 Apr 8 15:43 /usr/bin/java -> /etc/alternatives/java

终端输入

ls -lrt /etc/alternatives/java

终端输出

[root@iZ8vb2e3mzflkvty6k7eraZ agent-2.4.0-release]# ls -lrt /etc/alternatives/java lrwxrwxrwx 1 root root 73 Apr 8 15:43 /etc/alternatives/java -> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64/jre/bin/java

配置JAVA_HOME

打开配置文件

vim /etc/profile

增加下面的配置

export JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.201.b09-2.el7_6.x86_64 export JRE_HOME=$JAVA_HOME/jre export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

保存退出

生效配置

source /etc/profile

测试配置结果

echo $JAVA_HOME