Starting jenkins (via systemctl): Job for jenkins.service failed because the control process exited with error code. See “systemctl status jenkins.service” and “journalctl -xe” for details.
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启动jenkins（通过systemctl）：jenkins.service的作业失败，因为控制进程退出并显示错误代码。 有关详细信息，请参阅“systemctl status jenkins.service”和“journalctl -xe”。
按提示输入：systemctl status jenkins.service
● jenkins.service - LSB: Jenkins Automation Server
Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
Active: failed (Result: exit-code) since Sun 2018-09-09 17:46:22 CST; 2min 12s ago
Docs: man:systemd-sysv-generator(8)
Process: 9429 ExecStart=/etc/rc.d/init.d/jenkins start (code=exited, status=1/FAILURE)
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z systemd[1]: Starting LSB: Jenkins Automation Server...
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z runuser[9434]: pam_unix(runuser:session): session opened for user jenkins by (uid=0)
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z jenkins[9429]: Starting Jenkins bash: /usr/bin/java: No such file or directory
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z jenkins[9429]: [FAILED]
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z systemd[1]: jenkins.service: control process exited, code=exited status=1
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z systemd[1]: Failed to start LSB: Jenkins Automation Server.
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z systemd[1]: Unit jenkins.service entered failed state.
Sep 09 17:46:22 izm5e1qim1yoreb6toj6d9z systemd[1]: jenkins.service failed.解决办法
意思就是没有找到java文件，需要自己把java文件地址复制过去
修改/etc/init.d/jenkins文件
粘贴即可