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In a server environment there are different levels of updates,
- upgrade - Package Update
- Kernel Updates
- 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- dist-upgrade - Package Update using conflict resolution to remove outdated packages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 next level is updating the Kernel (Roderick add link to Kernel on Wikipedia and go over high level what the Kernel gives you... bottom line why anyone would want to upgrade the Kernel).
The command to upgrade it,
| Code Block |
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sudo apt-get upgrade |
From the man pages,
| Panel |
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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,
| Code Block | ||
|---|---|---|
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sudo apt-get dist-upgrade |
In some cases the system will prompt you to reboot for the new kernel to take effect.
From the man pages,
do-release-update