Failing that, ensure that you have copies of user home directories, any custom configuration files, and data stored by services such as relational databases. The best way to accomplish this is to make a backup of your entire filesystem. Step 1 – Back Up Your Systemīefore attempting a major upgrade on any system, you should make sure you won’t lose data if the upgrade goes awry.
In Ubuntu 16.04, important changes since the preceding LTS release include a transition to the systemd init system in place of Upstart, an emphasis on Python 3 support, and PHP 7 in place of PHP 5.īefore upgrading, consider reading the Xenial Xerus Release Notes. Keep in mind that libraries, languages, and system services may have changed substantially. You should never upgrade a production system without first testing all of your deployed software and services against the upgrade in a staging environment. Potential PitfallsĪlthough many systems can be upgraded in place without incident, it is often safer and more predictable to migrate to a major new release by installing the distribution from scratch, configuring services with careful testing along the way, and migrating application or user data as a separate step. This guide assumes that you have a system running Ubuntu 15.10, configured with a non-root user with sudo privileges for administrative tasks. This guide will explain the process for systems including (but not limited to) DigitalOcean Droplets running Ubuntu 15.10. This may be useful for testing both the upgrade process and the features of 16.04 itself in advance of the official release date. The Ubuntu operating system’s next Long Term Support release, version 16.04 (Xenial Xerus), is due to be released on April 21, 2016.Īlthough 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. You can follow our series on how to migrate to a new Linux server to learn how to migrate between servers. You may still need to review differences in software configuration when upgrading, but the core system will likely have greater stability. To avoid these problems, when possible, we recommend migrating to a fresh Ubuntu 16.04 server rather than upgrading in-place. Comprehensive backups and extensive testing are strongly advised. 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.
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