I had a particularly outdated ubuntu distribution (12.10) and was beginning the process to update sequentially to 16.04. Yesterday, I successfully updated from 12.10->13.10->14.04 using the Ubuntu old releases archive and this tutorial from Digital Ocean. I didn’t have to change the kernel, because our droplet was using grubloader v2.0.
Excited at the success of updating, I used do-release-upgrade to move from 14.04 to 16.04 and, while the distribution was updated successfully, I immediately ran into 502 errors (nginx /1.4.6) after updating. I am new to all of this, so I did the release upgrade from 14.04 to 16.04 in the exact same way as the 13.10->14.04 upgrade.
When I try to access the nginx error logs, I get a “Permission denied” reading. First question: How do I access the error logs? Second question (dependent on what the error logs might or might not show): has anyone run into this problem when updating from 14.04->16.04? Also, I restored my droplet back to 12.10 and updated back to 14.04 and I am now running into the same 502 errors, despite the 14.04 update working fine previously.
Here is the “Permission denied” code:
Welcome to Ubuntu 14.04.5 LTS (GNU/Linux 3.13.0-143-generic i686) * Documentation: https://help.ubuntu.com/ New release '16.04.4 LTS' available. Run 'do-release-upgrade' to upgrade to it. Last login: Wed Mar 21 12:34:48 2018 from c-73-205-79-49.hsd1.fl.comcast.net root@foss:~# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.5 LTS Release: 14.04 Codename: trusty root@foss:~# /var/log/nginx/error.log -bash: /var/log/nginx/error.log: Permission denied root@foss:~#
This textbox defaults to using Markdown to format your answer.
You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.