安装JAVA
下载java
[root@i-obqe21ce ~]# wget https://download.oracle.com/java/17/latest/jdk-17_linux-x64_bin.tar.gz [root@i-obqe21ce ~]# mkdir /usr/local/java [root@i-obqe21ce ~]# tar -zxvf jdk-17_linux-x64_bin.tar.gz -C /usr/local/java
添加变量
[root@i-obqe21ce ~]# vim /etc/profile export JAVA_HOME=/usr/local/java/jdk-17.0.2 export JRE_HOME=/${JAVA_HOME} export CLASSPATH=.:${JAVA_HOME}/libss:${JRE_HOME}/lib export PATH=${JAVA_HOME}/bin:$PATH
变量生效
[root@i-obqe21ce ~]# source /etc/profile [root@i-obqe21ce ~]# java -version java version "17.0.2" 2022-01-18 LTS Java(TM) SE Runtime Environment (build 17.0.2+8-LTS-86) Java HotSpot(TM) 64-Bit Server VM (build 17.0.2+8-LTS-86, mixed mode, sharing)
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