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This article requires more details with links to the other upgrade options. Maybe even have a general intro page on updates. Also, the same steps to record the Ubuntu version information before running the update. |
In a server environment there are different levels of updates,
- upgrade - Package Update without removing packages
- dist-upgrade - Package Update using conflict resolution to remove outdated packages
- do-release-update - Release Updates
This is to allow the administer fine grained control. The more higher level of updates, the more risk to a system.
upgrade
Package Update using upgrade is the safest and covered in Setup Ubuntu Linux Base Server. The command to upgrade it,
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sudo apt-get upgrade |
From the man pages,
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dist-upgrade in addition to performing the function of upgrade, also intelligently handles changing dependencies with new versions of packages; apt-get has a "smart" conflict resolution system, and it will attempt to upgrade the most important packages at the expense of less important ones if necessary. So, dist-upgrade command may remove some packages. The /etc/apt/sources.list file contains a list of locations from which to retrieve desired package files. See also apt_preferences(5) for a mechanism for overriding the general settings for individual packages. |
do-release-upgrade
The next level is,
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sudo apt-get dist-upgrade |
From the man pages,
do-release-update