On Thursday 27 Jul 2017 09:48:43 symack wrote: > There must be an easy way to do this. Something like download the latest > portage and source package. Untar on live system and rebuild! > That would be so amazing if possible.
There are a number of ways you could approach this. 1. Offline Update Emerge within a chroot on an offline system having set the same CFLAGS with your production box, build binary packages, copy them over and run: emerge -uaNDkv @system Run dispatch, gcc-config, @represerved-rebuild, depclean and the like and assuming all is good reboot in the new kernel and repeat for world. This will ensure minimal downtime. 2. Online Update If downtime can be tolerated and your system is fast, you can back up /etc, /var/lib/portage/world and your database(s), take the system offline and reinstall with the latest stage 3 filesystem and portage from a LiveCD. This will take considerably longer. 3. Hybrid Personally, I would opt for a combo of 2 and 1. In other words, I would re- install offline using the configuration and databases of the live system, then test the new build to make sure all is working as expected. Finally, take the prod system offline, and tar over the whole filesystem from the recently rebuilt mirror. There may be some minor tweaks needed for fstab, hosts files between the two, but otherwise you will end up with a fresh build on your production box with relatively small amount of downtime. You will also have an offline/cold standby system to manage emergencies and emerges with. -- Regards, Mick
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