If I can do it, so can anyone. After this operation, 0 B of additional disk space will be used. To upgrade a specific package, without upgrading all the other out-of-date packages at the same time, you can use sudo apt install somepackage which may be useful if you're low on disk space or you have limited download bandwidth. If you found a bug, we'd appreciate it if you. There's a few things we can do in an effort to resolve this. If upgrading from older version, you must turn off ppa and any proprietary drivers or upgrade may fail due to incompatible versions. Works great for me in Debian. This will just look into the database and if a newer version is found, it will upgrade the installed package to the newer one. Once the download has finished, the process cannot be canceled. If the package is removed, these automatically installed packages, though useless, remains in the system. The most convenient way is to upgrade all the packages that have updates available. Answer y for yes and press Enter.
Introduction 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. 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 to learn how to migrate between servers. The Ubuntu operating system's next Long Term Support release, version 16. Although it hasn't yet been released at the time of this writing, it's already possible to upgrade a 15. This may be useful for testing both the upgrade process and the features of 16. This guide will explain the process for systems including but not limited to DigitalOcean Droplets running Ubuntu 15. Prerequisites This guide assumes that you have a system running Ubuntu 15. Potential Pitfalls Although 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. You should never upgrade a production system without first testing all of your deployed software and services against the upgrade in a staging environment. Keep in mind that libraries, languages, and system services may have changed substantially. Before upgrading, consider reading the. Step 1 — Back Up Your System Before attempting a major upgrade on any system, you should make sure you won't lose data if the upgrade goes awry. The best way to accomplish this is to make a backup of your entire filesystem. Failing that, ensure that you have copies of user home directories, any custom configuration files, and data stored by services sudo apt update as relational sudo apt update. On a DigitalOcean Droplet, the easiest approach is to power down the system and take a snapshot powering down ensures that the filesystem will be more consistent. See for more details on the snapshot process. When you have verified that the update was successful, you can delete the snapshot so that you will no longer be charged for it. For backup methods which will work on most Ubuntu systems, see. sudo apt update Step 2 — Upgrade Currently Installed Packages Before beginning the release upgrade, it's safest to install the latest versions of all packages for the current release. Answer y for yes and press Enter. This process may take some time. Once it finishes, use the dist-upgrade command, which will perform upgrades involving changing dependencies, adding or removing new packages as necessary. Now that you have an up-to-date installation of Ubuntu 15. Ubuntu is still a Debian-derived distribution, so this process would likely still work. Instead, however, we'll use do-release-upgrade, a tool provided by the Ubuntu project, which handles checking for a new release, updating sources. This is the officially recommended upgrade path for server upgrades which must be performed over a remote connection. For other systems under your control, remember that it's safest to perform major operating system upgrades only when you have direct physical access to the machine. This session appears to be running under ssh. It is not recommended to perform a upgrade over ssh currently because in case of failure it is harder to recover. If you continue, an additional ssh daemon will be started at port '1022'. Do you want to continue. If anything goes wrong sudo apt update the running ssh you can still connect to the additional one. If you run a firewall, you may need to temporarily open this port. As this is potentially dangerous it's not done automatically. You can open the port with e. Next, you may be warned that a mirror entry was not found. On DigitalOcean systems, it is safe to ignore this warning and proceed with the upgrade, since a local mirror for 16. Enter y: Updating repository information No valid mirror found While scanning your repository information no mirror entry for the upgrade was found. This can happen if you run an internal mirror or if the mirror information is out of date. Do you want to rewrite your 'sources. If you choose 'Yes' here it will update all 'trusty' to 'xenial' entries. If you select 'No' the upgrade will cancel. Again, enter y to continue: Do sudo apt update want to start the upgrade. You can still get support from the community. You have to download a total of 232 M. This download will take about 46 seconds with your connection. Installing the upgrade can take several hours. Once the download has finished, the process cannot be canceled. Even if your system is on a fast connection, this will take a while. During the installation, you may be presented with interactive dialogs for various questions. In other cases, you may be asked if you wish to replace a configuration file that you have modified with the default version from the package that is being installed. This is often a judgment call, and is likely to require knowledge about specific software that is outside the scope of this tutorial. Once new packages have finished installing, you'll be asked whether you're ready to remove obsolete packages. On a stock system with no custom configuration, it should be safe to enter y here. On a system you have modified heavily, you may wish to enter d and inspect the list of packages to be removed, in case it includes anything you'll need to reinstall later. Enter y to continue: System upgrade is complete. Restart required To finish the upgrade, a restart is required. If you select 'y' the system will be restarted. Wait a moment for your system sudo apt update reboot, and reconnect. From here, you likely need to investigate necessary configuration changes to services and deployed applications. In the coming weeks, we'll begin posting DigitalOcean guides specific to Ubuntu 16.
