I am learning Jenkins right now. I installed Jenkins on a t2.small Ubuntu EC2 instance. Everything was working fine. I stopped the instance. The next day, I started the instance and it took a very long time for the sign-in page and dashboard to load, basically unusable. I cannot seem to find troubleshooting information, and I am also new to Linux, AWS, and Jenkins.
I made sure that I was connected to the correct public IP address (no time out). I also restarted the Jenkins service. I also tried accessing the public IP address on a different browser. I ended up just terminating the instance and creating a new one.