[linux] remove old kernel

Remove Old Kernel

dpkg -l | grep linux-image-

rc  linux-image-4.15.0-74-generic                      4.15.0-74.84                                       amd64        Signed kernel image generic
rc  linux-image-4.15.0-76-generic                      4.15.0-76.86                                       amd64        Signed kernel image generic
rc  linux-image-4.15.0-88-generic                      4.15.0-88.88                                       amd64        Signed kernel image generic
rc  linux-image-4.15.0-91-generic                      4.15.0-91.92                                       amd64        Signed kernel image generic
rc  linux-image-4.15.0-96-generic                      4.15.0-96.97                                       amd64        Signed kernel image generic
rc  linux-image-4.15.0-99-generic                      4.15.0-99.100                                      amd64        Signed kernel image generic
ii  linux-image-5.0.0-32-generic                       5.0.0-32.34~18.04.2                                amd64        Signed kernel image generic
rc  linux-image-5.0.0-37-generic                       5.0.0-37.40~18.04.1                                amd64        Signed kernel image generic
rc  linux-image-5.3.0-26-generic                       5.3.0-26.28~18.04.1                                amd64        Signed kernel image generic
rc  linux-image-5.3.0-28-generic                       5.3.0-28.30~18.04.1                                amd64        Signed kernel image generic
rc  linux-image-5.3.0-40-generic                       5.3.0-40.32~18.04.1                                amd64        Signed kernel image generic
rc  linux-image-5.3.0-42-generic                       5.3.0-42.34~18.04.1                                amd64        Signed kernel image generic
rc  linux-image-5.3.0-45-generic                       5.3.0-45.37~18.04.1                                amd64        Signed kernel image generic
ii  linux-image-5.3.0-46-generic                       5.3.0-46.38~18.04.1                                amd64        Signed kernel image generic
ii  linux-image-5.3.0-51-generic                       5.3.0-51.44~18.04.2                                amd64        Signed kernel image generic
ii  linux-image-generic-hwe-18.04                      5.3.0.51.104                                       amd64        Generic Linux kernel image

1. Column (desired action):

   u = Unknown
   i = Install
   h = Hold
   r = Remove
   p = Purge
   

2. Column (package status):

   n = Not-installed
   c = Config-files
   H = Half-installed
   U = Unpacked
   F = Half-configured
   W = Triggers-awaiting
   t = Triggers-pending
   i = Installed

sudo apt-get autoremove linux-image-5.3.0-51-generic
Reboot
sudo apt-get autoremovesudo apt-get autocleansudo apt full-upgradesudo apt-get dist-upgrade

sudo update-grub

Remove Custom Compiled Kernel

uname -srm

locate "*5.16.0-rc3*" | sudo xargs -ixxx rm -rf 'xxx'

sudo update-grub