remove-old-ubuntu-kernels.md

Remove old kernels

• list current kernel - uname -r
• list kernels installed - dpkg --list | grep linux-image
• remove each kernel one by one - sudo apt-get purge linux-image-x.x.x.x-generic
• if that fails due to space then use dpkg:
  • sudo dpkg --purge linux-image-4.2.0-15-generic
  • sudo dpkg --purge linux-headers-4.2.0-15-generic
  • sudo dpkg --purge linux-headers-4.2.0-15
• if that fails just delete files from /boot manually
  • sudo rm -rf /boot/*-3.2.0-{23,45,49,51,52,53,54,55}-*
  • then you can try above steps again