centos yum或者rpm安装jenkins后起不来 vi /etc/init.d/jenkins candidates="/usr/local/jdk1.8.0_171/bin/java/etc/alternatives/java/usr/lib/jvm/java-1.8.0/bin/java/usr/lib/jvm/jre-1.8.0/bin/java/usr/lib/jvm/java-1.7.0/bin/java/usr/lib/jvm/jre-1.7.0/bin/java/usr/b