I naively didn't leave enough space on my / partition and now /boot doesn't
have enough space for me to upgrade to the latest kernel. Only the current
kernel is there now and I'm still short a few megs. This is a live server
so I can't really mess with it too much. What can I do?
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The answer depends on what bootloader you are using and how your
partition table is configured?
I'm thinking that you should reset the active flag to a different
partition (with free space)
copying your /boot folder contents to that partition
Then install your bootloader onto that partition