Running Ubuntu 18.04, I changed from a swap partition to a swap file.
swapon -s (summary) and free show the swapfile with the new size. /etc/fstab was changed, permission on the swapfile changed and the swap partition was deleted. When there are updates (apt-get update and upgrade), I get this error:
Setting up amd64-microcode (3.20180524.1~ubuntu0.18.04.2) ... update-initramfs: deferring update (trigger activated) amd64-microcode: microcode will be updated at next boot Processing triggers for libc-bin (2.27-3ubuntu1) ... Processing triggers for initramfs-tools (0.130ubuntu3.1) ... update-initramfs: Generating /boot/initrd.img-4.15.0-29-generic W: initramfs-tools configuration sets RESUME=UUID=c5a2c6f4-b67c-4d95-bc23-8333ed6c0f11 W: but no matching swap device is available.
The UUID listed there is for the old swap partition. I didn't think a swap file has a UUID, but I am not sure about that. Everything else seems to work fine. How should I proceed to troubleshoot and fix this?