linux path 配置习惯

JAVA_HOME=/usr/jdk1.8.0_131
export JAVA_HOME

MAVEN_HOME=/usr/apache-maven-3.3.9
export MAVEN_HOME

JENKINS_HOME=/usr/JenkinsHome
export JENKINS_HOME

PATH=$PATH:$HOME/bin:$MAVEN_HOME/bin:$JAVA_HOME/bin:.

export PATH