Linux安装JDK

1.解压

jdk安装目录：/usr/local/java/

# 创建目录
cd /usr/local
mkdir java

# 解压
tar -zxvf jdk-8u251-linux-x64.tar.gz -C /usr/local/java/

2.配置

vi /etc/profile

将下面内容粘贴到文件末尾，JAVA_HOME=/usr/local/java/jdk1.8.0_251，就是jdk所在目录

export JAVA_HOME=/usr/local/java/jdk1.8.0_251
export CLASSPATH=.:${JAVA_HOME}/jre/lib/rt.jar:${JAVA_HOME}/lib/dt.jar:${JAVA_HOME}/lib/tools.jar
export PATH=$PATH:${JAVA_HOME}/bin

让配置生效

source /etc/profile

3.验证

java -version
jps