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When this happens, it means that Gentoo developers no longer plan on supporting it.
The way to update may vary significantly from release to release; it depends on how deep the modifications introduced in the new profile are.
In the simplest case users only have to change the symlink, in the worst case they may have to recompile the entire system from scratch while doing a neat voodoo dance. The necessary instructions are explained further in this guide.
A profile is a set of configuration files, stored in a subdirectory of , that describe things such as the ebuilds that are considered system packages, the default USE flags, the default mapping for virtual packages, and the architecture on which the system is running.
The profile in use is determined by the symbolic link .
Generally, such migrations are not mandatory, and systems can continue to use the old profile - just update the packages as explained in the Gentoo Handbook.
However, Gentoo strongly recommends updating the profile if it becomes deprecated.
To upgrade such systems, a recent stage3 can be used to update the system.
Instructions for that are given in the Updating old systems section. For this to work, a Unicode locale for the system must be created.
If this is the case, the system should first receive older Portage tree snapshots and upgrade at least Portage (but preferably all packages in the system set), gradually increasing the Portage tree snapshot date until it is recent enough to follow the profile switching instructions again: Older snapshots are often still available on some mirrors on the Internet or on specific locations dedicated for this purpose.
It is recommended to verify the integrity of those files to make sure they are not tampered with: Although the release signing keys might be expired, the signature should still be OK. The upgrade path might need intermediate versions of software (such as portage) that does not exist any more, requiring to update the portage tree in steps (for instance incremental tree updates with steps of 3 to 4 months).
A recurring question about the Gentoo release process is: "Why roll out new releases frequently, if they are not intended to let users update software?Tags: Adult Dating, affair dating, sex dating