linux中执行java或者mvn命令提示没有权限解决办法
$ chmod a+x /var/jenkins_home/jdk1.8.0_191/bin/java
$ chmod a+x /var/jenkins_home/apache-maven-3.3.9/bin/mvn
$ chmod a+x /var/jenkins_home/jdk1.8.0_191/bin/java
$ chmod a+x /var/jenkins_home/apache-maven-3.3.9/bin/mvn