Jenkins fails when running “service start jenkins”

Question

I installed jenkins on Cnetos 7 using the following:

sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins.io/redhat-stable/jenkins.repo
sudo rpm --impor         


        

Answer 1

In my case, the port 8080 was taken by some other service (Apache Airflow).

So I edit the HTTP port in this file:

sudo vi /etc/default/jenkins

And then started the service and it worked:

sudo service jenkins start

I was on Ubuntu 18.04 and installed openjdk-8