Cai ubuntu 18.04.1 bị lỗi grup packet faile năm 2024
Ubuntu supports the ability to upgrade from one LTS to the next LTS in sequential order. For example, a user on Ubuntu 16.04 LTS can upgrade to Ubuntu 18.04 LTS, but cannot jump directly to Ubuntu 20.04 LTS. To do this, the user would need to upgrade twice: once to Ubuntu 18.04 LTS, and then upgrade again to Ubuntu 20.04 LTS. It is recommended that users run an LTS release as it provides 5 years of standard support and security updates. After the initial standard support, an extended support period is available via an Ubuntu Pro subscription. For a complete list of releases and current support status see the Ubuntu Wiki Releases page. Upgrade checklistTo ensure a successful upgrade, please review the following items:
UpgradeIt is recommended to upgrade the system using the do-release-upgradeTo begin the process run the following command:
Upgrading to a development release of Ubuntu is available using the Upgrades from one LTS to the next LTS release are only available after the first point release. For example, Ubuntu 18.04 LTS will only upgrade to Ubuntu 20.04 LTS after the 20.04.1 point release. If users wish to update before the point release (e.g., on a subset of machines to evaluate the LTS upgrade) users can force the upgrade via the Pre-upgrade summaryBefore making any changes the command will first do some checks to verify the system is ready to update. The user will be prompted with a summary of the upgrade before proceeding. If the user accepts the changes, the process will begin to update the system’s packages:
Configuration changesIt is possible during the upgrade process the user gets presented with a message to make decisions about package updates. These prompts occur when there are existing configuration files edited by the user and the new package configuration file are different. Below is an example prompt:
Users should look at the differences between the files and decide what to do. The default response is to keep the current version of the file. There are situations where accepting the new version, like with Package removalAfter all packages are updated the user will again remove any obsolete, no longer needed, packages:
RebootFinally, when the upgrade is complete the user is prompted to reboot the system. The system is not considered upgraded until a reboot occurs: |