Christopher Juckins

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ubuntu_20_notes

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VirtualBox running Ubuntu 20 Notes

5 Oct 2021

Sometimes trying to boot into Ubuntu 20 from VirtualBox just results in a black screen with blinking cursor. The last known version of VirtualBox to work was a "test" version, VirtualBox-6.1-6.1.27_146688_test_el7-1.x86_64.rpm but now it fails.

I then installed VirtualBox-6.1-6.1.27_147252_test_el7-1.x86_64.rpm and the VM started up.

  • Maybe the VirtualBox RPM just needed to be uninstalled and then reinstalled?

This has been installed and tested. Also migrated Unifi controller to it.

Upgrade 18.04 to 20.04

  • After following these steps and booting into new kernel, machine would not start
  • Booted into old kernel, and ran an update for new packages. New kernel was downloaded and installed.
  • Had a new kernel not been available, I suspect reinstalling the original kernel that was failing would have fixed the problem

Fix /swapfile

Change hostname

Gmail SMTP on Ubuntu 20

  • Install postfix and choose "Internet site"
  • Accept suggested FQDN
  • Don't add another user for /etc/aliases (root is already there)
  • For comma-separated list of domains, accept defaults
  • Accept defaults for everything else, such as synchronous mail, network blocks, etc.
  • Follow rest of instructions
  • Send test message
ubuntu_20_notes.1633457706.txt.gz · Last modified: 2021/10/05 14:15 by juckins