java linux安装jdk，git, maven

jdk8下载地址：https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

vi /ect/profile

#java_home
export JAVA_HOME=/usr/local/java/jdk1.8.0_211
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export PATH=$PATH:$JAVA_HOME/bin
#git 
export PATH="/usr/local/git/bin:$PATH"
#maven
#maven
export MAVEN_HOME=/usr/local/maven/apache-maven-3.6.1
export PATH=${MAVEN_HOME}/bin:${PATH}

保存后激活：

source /etc/profile