I do not understand vmlinuz

[joneall]

I think vmlinuz.... is a compressed kernel, right? I habitually run two Neon systems on different partitions, with my personal files on a single partition linked into /home/me. For some reason, they are out of sync.

$ ll /boot/vm*
lrwxrwxrwx 1 root root 24 sept. 20 08:25 /boot/vmlinuz -> vmlinuz-6.8.0-45-generic
-rw------- 1 root root 11700328 août 29 14:47 /boot/vmlinuz-5.15.0-122-generic
-rw------- 1 root root 14928264 juil. 30 17:17 /boot/vmlinuz-6.8.0-40-generic
-rw------- 1 root root 14911880 sept. 11 15:59 /boot/vmlinuz-6.8.0-45-generic
lrwxrwxrwx 1 root root 26 sept. 20 08:25 /boot/vmlinuz.old -> vmlinuz-5.15.0-122-generic
jon@jon-desktop:~$ sudo mount /dev/sda2 mnt-temp/
jon@jon-desktop:~$ ll mnt-temp/boot/vm*
lrwxrwxrwx 1 root root 26 sept. 17 08:03 mnt-temp/boot/vmlinuz -> vmlinuz-5.15.0-122-generic
-rw------- 1 root root 11704712 août 2 16:43 mnt-temp/boot/vmlinuz-5.15.0-119-generic
-rw------- 1 root root 11699080 août 9 10:16 mnt-temp/boot/vmlinuz-5.15.0-121-generic
-rw------- 1 root root 11700328 août 29 14:47 mnt-temp/boot/vmlinuz-5.15.0-122-generic
-rw------- 1 root root 14928264 juil. 30 17:17 mnt-temp/boot/vmlinuz-6.8.0-40-generic
lrwxrwxrwx 1 root root 26 sept. 17 08:03 mnt-temp/boot/vmlinuz.old -> vmlinuz-5.15.0-121-generic
$ uname -a
Linux jon-desktop 6.8.0-45-generic #45~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Wed Sep 11 15:25:05 UTC 2 x86_64 x86_64 x86_64
GNU/Linux

I had done an apt-get dist-upgrade just before on both systems and neither had wanted to install anything. Both systems seem to work just fine, although both have bluetooth problems.
Both are maintained by apt-get and have been for years.

[Snowhog]

VERY old page, but: https://www.linfo.org/vmlinuz.html

You have two Neons on separate partitions. What the above tells me is that one hasn't yet been upgraded to the newer kernel, or, you are still booting into the older (5.15.0-122) one on that partition.

[joneall]

VERY old page, but: https://www.linfo.org/vmlinuz.html

Yes, very old, and I knew that much. Thanks anyway.

You have two Neons on separate partitions. What the above tells me is that one hasn't yet been upgraded to the newer kernel, or, you are still booting into the older (5.15.0-122) one on that partition.

No, I keep both up to date and log in to each in alternance every 3-4 days. I do a dist-upgrade in each as soon as I boot and log in. So I have no idea when they got out of sync,

I logged in to both today and did a dist-upgrade. The result is what you see. They just are not in sync. But both are supposedly the same system. If both are Neon and both upgraded yesterday, why is that so?

[oshunluvr]

Personally, I think your systems could use a little clean up. If you're not booting to the 5 series kernels, remove them.

As far as "out of sync" goes, the second system still has 5.15.0-122 set as the current kernel and -121 as the old kernel. I suspect if you remove all the 5 series kernels, reboot to the 6.8.0-40 kernel, you'll get the 6.8.0-45 kernel offered in the upgrade - like your first system did on Sept. 11.