Solved: Ubuntu 20.04 update makes boot time increase by 4 minutes

I’m doing software development on an Ubuntu 20.04 VM running on my MacBook Pro via Parallels Desktop 17. I recently noticed that the “Software Update” app in the Ubuntu desktop machine was saying there were a lot of things to update, which makes sense since I just created this VM a couple of months ago via a fancy Ansible playbook, and I haven’t gotten around to updating it until yesterday.

Well, after the update, it started taking a really long time to boot. There were two places where it hangs for 2 minutes for no apparent reason, meaning that the boot process is about 4-1/2 minutes long.

I’ve figured out what happened and found a workaround, but I’ll mention a few of the things I looked at along the way since they’re sort of interesting and may be relevant if your issue is similar but not caused by the same thing.

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CentOS 5.3 Minimal VPS Install Guide

I just did this yesterday; you can pretty much just follow my CentOS 5.1 Minimal VPS Install Guide.

The differences are:

  • When you get to the “More Minimizing” section, yum -C grouplist will show a package called “Yum Utilities” which you probably want to leave installed.
  • The Deployment_Guide-en-US file is not there so you don’t need to remove it.

That’s it.

I should also note that downloading a 3.9GB DVD ISO image in order to build a ~700MB installed OS may not be very efficient. I didn’t bother looking for a network installer but that might be the way to get this done faster.