Jenkins配置文件路径（常用于修改端口）：
CentOS下：/etc/sysconfig/jenkins
Debian/Ubuntu下：/etc/default/jenkins
jenkins日志文件路径：/var/log/jenkins/jenkins.log

vim /etc/sysconfig/jenkins配置文件中，有JENKINS_HOME="/var/lib/jenkins"，

再cd /var/lib/jenkins目录下