在Ubuntu 16.04上类似的问题。
Setting up jenkins (2.72) ...
Job for jenkins.service Failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.
invoke-rc.d: initscript jenkins, action "start" Failed.
● jenkins.service - LSB: Start Jenkins at boot time
Loaded: loaded (/etc/init.d/jenkins; bad; vendor preset: enabled)
Active: Failed (Result: exit-code) since Tue 2017-08-01 05:39:06 UTC; 7ms ago
Docs: man:systemd-sysv-generator(8)
Process: 3700 ExecStart=/etc/init.d/jenkins start (code=exited, status=1/FAILURE)
Aug 01 05:39:06 ip-0 systemd[1]: Starting LSB: Start Jenkins ....
Aug 01 05:39:06 ip-0 jenkins[3700]: ERROR: No Java executable ...
Aug 01 05:39:06 ip-0 jenkins[3700]: If you actually have java ...
Aug 01 05:39:06 ip-0 systemd[1]: jenkins.service: Control pro...1
Aug 01 05:39:06 ip-0 systemd[1]: Failed to start LSB: Start J....
Aug 01 05:39:06 ip-0 systemd[1]: jenkins.service: Unit entere....
Aug 01 05:39:06 ip-0 systemd[1]: jenkins.service: Failed with....
要解决此问题，请手动安装Java Runtime Environment：
JDK版本9：
sudo apt install openjdk-9-jre
JDK版本8：
sudo apt install openjdk-8-jre
打开Jenkins配置文件：
sudo vi /etc/init.d/jenkins
最后，将路径附加到新的Java可执行文件（第16行）：
PATH=/bin:/usr/bin:/sbin:/usr/sbin:/usr/lib/jvm/java-8-openjdk-amd64/bin/
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