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Warning: As with almost any upgrade between major releases of an operating system, this process carries an inherent risk of failure, data loss, or broken software configuration. Comprehensive backups and extensive testing are strongly advised.
To avoid these problems, when possible, we recommend migrating to a fresh Ubuntu 16.04 server rather than upgrading in-place. You may still need to review differences in software configuration when upgrading, but the core system will likely have greater stability. You can follow our series on how to migrate to a new Linux server to learn how to migrate between servers.
The Ubuntu operating system’s next Long Term Support release, version 16.04 (Xenial Xerus), is due to be released on April 21, 2016.
Although it hasn’t yet been released at the time of this writing, it’s already possible to upgrade a 15.10 system to the development version of 16.04. This may be useful for testing both the upgrade process and the features of 16.04 itself in advance of the official release date.
This guide will explain the process for systems including (but not limited to) DigitalOcean Droplets running Ubuntu 15.10.
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I wouldn’t recommend anyone uses 16.04 until it has been officially added to DigitalOcean and has been out for long enough for others to stumble into issues first.
However, I will give this a go regardless!
If you’re upgrading a server managed by ServerPilot, be sure to use the instructions here:
https://serverpilot.io/community/articles/how-to-upgrade-ubuntu-14.04-to-16.04.html
Upgrading left me with a readonly filesystem and an old kernel (3.13.0-79)
Which is the default DATABASE server for 16.04?
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Pro-tip. Start scripting your deploys, then fix scripts, and restores on new droplets…
As mentioned, Ubuntu 16.04 uses MySQL 5.7. Unlike earlier versions of MySQL, 5.7 is set to “strict mode” by default. Strict mode may block some of your functions. The following link shows how to disable strict mode - https://mattstauffer.co/blog/how-to-disable-mysql-strict-mode-on-laravel-forge-ubuntu
The Point Release is scheduled for July 21st, 2016. That might be helpful to add to the warning at the start of the tutorial.
16.04.1 is released. But, ‘sudo do-release-upgrade’ command is still giving ‘No new release found’ message. Am afraid to switch to development release (‘-d’ option).
Is it something we have to wait for digitalocean needs to enable?
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