在centos中使用rpm安装包安装jenkins2.89

 1.下载  在https://pkg.jenkins.io/redhat-stable/ 下载 jenkins-2.89.4-1.1.noarch.rpm

 2.安装  rpm -ih  jenkins-2.89.4-1.1.noarch.rpm

 3.启动/停止/重启命令：service jenkins start/stop/restart

 4.安装目录结构

           /usr/lib/jenkins/jenkins.war     WAR包 

           /etc/sysconfig/jenkins       　　 配置文件

           /var/lib/jenkins/        　　　　   默认的JENKINS_HOME目录

            /var/log/jenkins/jenkins.log      Jenkins日志文件

 5.启动jenkins

    service jenkins start

    Starting Jenkins bash: /usr/bin/java: 没有那个文件或目录[失败]

    出现此异常说明没有找到 java 目录下的 bin 目录，解压不了 jenkins.war

    解决如下：vim /etc/init.d/jenkins

   # Search usable Java. We do this because various reports indicated
# that /usr/bin/java may not always point to Java >= 1.6
# see http://www.nabble.com/guinea-pigs-wanted-----Hudson-RPM-for-RedHat-Linux-td25673707.html
candidates="
/etc/alternatives/java
/usr/lib/jvm/java-1.6.0/bin/java
/usr/lib/jvm/jre-1.6.0/bin/java
/usr/lib/jvm/java-1.7.0/bin/java
/usr/lib/jvm/jre-1.7.0/bin/java
/usr/lib/jvm/java-1.8.0/bin/java
/usr/lib/jvm/jre-1.8.0/bin/java
/usr/bin/java
添加 /usr/local/jdk8/java/bin 

再次启动：service jenkins start

安装完成访问：http://ip:端口号即可

出现界面按下步骤输入密码，安装插件即可

登录输入密码：

      查看默认密码将密码粘贴到文本框中：

       cat /var/lib/jenkins/secrets/initialAdminPassword

       97c675381d524414ba11e61c4f4b7ef0

修改jenkins端口号：

vim /etc/sysconfig/jenkins
JENKINS_PORT="8888"