After the usual "your /boot is full" message, I tried to clean old kernels with byobu
sudo purge-old-kernels
No kernels are eligible for removal
However when I run ls /boot
, I get this
abi-4.4.0-78-generic initrd.img-4.4.0-51-generic.old-dkms initrd.img-4.4.0-70-generic.old-dkms memtest86+.bin
config-4.4.0-78-generic initrd.img-4.4.0-53-generic.old-dkms initrd.img-4.4.0-71-generic.old-dkms memtest86+.elf
efi initrd.img-4.4.0-57-generic.old-dkms initrd.img-4.4.0-72-generic.old-dkms memtest86+_multiboot.bin
grub initrd.img-4.4.0-59-generic.old-dkms initrd.img-4.4.0-75-generic System.map-4.4.0-78-generic
initrd.img-4.4.0-38-generic.old-dkms initrd.img-4.4.0-62-generic.old-dkms initrd.img-4.4.0-75-generic.old-dkms vmlinuz-4.4.0-78-generic
initrd.img-4.4.0-42-generic.old-dkms initrd.img-4.4.0-63-generic.old-dkms initrd.img-4.4.0-77-generic.old-dkms vmlinuz-4.4.0-78-generic.efi.signed
initrd.img-4.4.0-43-generic.old-dkms initrd.img-4.4.0-64-generic.old-dkms initrd.img-4.4.0-78-generic
initrd.img-4.4.0-45-generic.old-dkms initrd.img-4.4.0-66-generic.old-dkms initrd.img-4.4.0-79-generic.old-dkms
initrd.img-4.4.0-47-generic.old-dkms initrd.img-4.4.0-67-generic.old-dkms lost+found
When I run dpkg --list | egrep -i 'linux-image|linux-headers'
, the output includes
rc linux-image-extra-4.4.0-xx-generic 4.4.0-xx amd64 Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
What the rc
in front means? Why are these residual images there and how do I fix it?
EDIT 1: I removed all residual packages and now dpkg --list | egrep -i 'linux-image|linux-headers'
looks normal
ii linux-headers-4.4.0-78 4.4.0-78.99 all Header files related to Linux kernel version 4.4.0
ii linux-headers-4.4.0-78-generic 4.4.0-78.99 amd64 Linux kernel headers for version 4.4.0 on 64 bit x86 SMP
ii linux-image-4.4.0-78-generic 4.4.0-78.99 amd64 Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii linux-image-extra-4.4.0-78-generic 4.4.0-78.99 amd64 Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP
apt purge
gives 0 to upgrade, 0 to newly install, 0 to remove and 0 not to upgrade.
The grub is still full of initrd.img.