udo apt-get install --reinstall linux-image-generic linux-image

gistfile1.txt

yk@myk-Bravo-17-A4DDK:~/Downloads/amdgpu-pro-20.40-1147286-ubuntu-20.04$ sudo apt-get install --reinstall linux-image-generic linux-image
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package linux-image is a virtual package provided by:
  linux-image-unsigned-5.8.0-29-lowlatency 5.8.0-29.31
  linux-image-unsigned-5.8.0-29-generic 5.8.0-29.31
  linux-image-5.8.0-29-lowlatency 5.8.0-29.31
  linux-image-5.8.0-29-generic 5.8.0-29.31
  linux-image-unsigned-5.8.0-28-lowlatency 5.8.0-28.30
  linux-image-unsigned-5.8.0-28-generic 5.8.0-28.30
  linux-image-unsigned-5.8.0-26-lowlatency 5.8.0-26.27
  linux-image-unsigned-5.8.0-26-generic 5.8.0-26.27
  linux-image-unsigned-5.8.0-1012-azure 5.8.0-1012.13
  linux-image-unsigned-5.8.0-1011-gcp 5.8.0-1011.11
  linux-image-unsigned-5.8.0-1011-azure 5.8.0-1011.11
  linux-image-unsigned-5.8.0-1010-oracle 5.8.0-1010.10
  linux-image-unsigned-5.8.0-1009-kvm 5.8.0-1009.10
  linux-image-unsigned-5.8.0-1009-gcp 5.8.0-1009.9
  linux-image-unsigned-5.8.0-1008-oracle 5.8.0-1008.8
  linux-image-5.8.0-28-lowlatency 5.8.0-28.30
  linux-image-5.8.0-28-generic 5.8.0-28.30
  linux-image-5.8.0-26-lowlatency 5.8.0-26.27
  linux-image-5.8.0-26-generic 5.8.0-26.27
  linux-image-5.8.0-1013-aws 5.8.0-1013.14
  linux-image-5.8.0-1012-azure 5.8.0-1012.13
  linux-image-5.8.0-1011-gcp 5.8.0-1011.11
  linux-image-5.8.0-1011-azure 5.8.0-1011.11
  linux-image-5.8.0-1011-aws 5.8.0-1011.11
  linux-image-5.8.0-1010-oracle 5.8.0-1010.10
  linux-image-5.8.0-1009-kvm 5.8.0-1009.10
  linux-image-5.8.0-1009-gcp 5.8.0-1009.9
  linux-image-5.8.0-1008-oracle 5.8.0-1008.8
  linux-image-unsigned-5.7.0-15-lowlatency 5.7.0-15.16
  linux-image-unsigned-5.7.0-15-generic 5.7.0-15.16
  linux-image-5.7.0-15-lowlatency 5.7.0-15.16
  linux-image-5.7.0-15-generic 5.7.0-15.16
  linux-image-unsigned-5.8.0-25-lowlatency 5.8.0-25.26
  linux-image-unsigned-5.8.0-25-generic 5.8.0-25.26
  linux-image-unsigned-5.8.0-1010-azure 5.8.0-1010.10
  linux-image-unsigned-5.8.0-1008-kvm 5.8.0-1008.8
  linux-image-unsigned-5.8.0-1008-gcp 5.8.0-1008.8
  linux-image-unsigned-5.8.0-1007-oracle 5.8.0-1007.7
  linux-image-5.8.0-25-lowlatency 5.8.0-25.26
  linux-image-5.8.0-25-generic 5.8.0-25.26
  linux-image-5.8.0-1010-azure 5.8.0-1010.10
  linux-image-5.8.0-1010-aws 5.8.0-1010.10
  linux-image-5.8.0-1008-kvm 5.8.0-1008.8
  linux-image-5.8.0-1008-gcp 5.8.0-1008.8
  linux-image-5.8.0-1007-oracle 5.8.0-1007.7
You should explicitly select one to install.

E: Package 'linux-image' has no installation candidate
myk@myk-Bravo-17-A4DDK:~/Downloads/amdgpu-pro-20.40-1147286-ubuntu-20.04$