josephde@josephde-HP-Pavilion-Laptop-14-bf1xx:~$ sudo mv /boot/grub/grub.cfg.new ~
josephde@josephde-HP-Pavilion-Laptop-14-bf1xx:~$ sudo update-grub
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
josephde@josephde-HP-Pavilion-Laptop-14-bf1xx:~$ sudo apt-get install -f
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-image-5.8.0-55-generic
0 upgraded, 0 newly installed, 1 to remove and 167 not upgraded.
2 not fully installed or removed.
After this operation, 9,828 kB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 234944 files and directories currently installed.)
Removing linux-image-5.8.0-55-generic (5.8.0-55.62~20.04.1) ...
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-5.8.0-55-generic
/etc/kernel/postrm.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.8.0-55-generic (--remove):
 installed linux-image-5.8.0-55-generic package post-removal script subprocess returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
 linux-image-5.8.0-55-generic
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)
josephde@josephde-HP-Pavilion-Laptop-14-bf1xx:~$ sudo dpkg --configure -a
Setting up linux-image-5.11.0-25-generic (5.11.0-25.27~20.04.1) ...
Processing triggers for linux-image-5.11.0-25-generic (5.11.0-25.27~20.04.1) ...
/etc/kernel/postinst.d/dkms:
 * dkms: running auto installation service for kernel 5.11.0-25-generic
   ...done.
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-5.11.0-25-generic
/etc/kernel/postinst.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Script `/boot/grub/grub.cfg.new' contains no commands and will do nothing
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.11.0-25-generic (--configure):
 installed linux-image-5.11.0-25-generic package post-installation script subprocess returned error exit status 1
Errors were encountered while processing:
 linux-image-5.11.0-25-generic