Jenkins is not incorporating the jobs copied in jobs directory

Question

I installed a new Jenkins on a EC2 instance and copied the jobs directory from another Jenkins. However, Jenkins is not showing the projects on its website.
I use the directory: ./var/lib/jenkins/jobs
and I restart the Jenkins server using:

service jenkins restart

Also the "Reload Configuration from Disk" under "Manage Jenkins" is not working.
How can I make Jenkins to incorporate the jobs in the Jenkins jobs directory?

Answer 1

When jobs are not showing in the all tab, usually there are exceptions in the Jenkins logs. You can have incompatible or missing plugin.
You can also see if you have copied the jobs recursively, for example, verify that config.xml of a job is present. This and this can help you.