ray@ray-Kudu-Pro:~$ sudo apt autoremove
[sudo] password for ray:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-image-4.15.0-33-generic linux-modules-4.15.0-33-generic
0 upgraded, 0 newly installed, 2 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 74.5 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 186039 files and directories currently installed.)
Removing linux-image-4.15.0-33-generic (4.15.0-33.36) ...
/var/lib/dpkg/info/linux-image-4.15.0-33-generic.postrm ... removing pending trigger
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-4.15.0-33-generic
/etc/kernel/postrm.d/zz-update-grub:
/usr/sbin/grub-mkconfig: 34: /etc/default/grub: Syntax error: EOF in backquote substitution
run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 2
dpkg: error processing package linux-image-4.15.0-33-generic (--remove):
 installed linux-image-4.15.0-33-generic package post-removal script subprocess returned error exit status 1
Removing linux-modules-4.15.0-33-generic (4.15.0-33.36) ...
Errors were encountered while processing:
 linux-image-4.15.0-33-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)
ray@ray-Kudu-Pro:~$