I have a problem cleaning up my boot partition.  I have tried the usual commands (sudo apt autoremove -purge, sudo purge-old-kernels etc.) but no success.  It seems that the files that are in there are not being recognised as old kernels.ls /bootabi-4.10.0-26-lowlatency         memtest86+.binconfig-4.10.0-26-lowlatency      memtest86+.elfgrub                             memtest86+_multiboot.bininitrd.img-4.10.0-26-lowlatency  System.map-4.10.0-26-lowlatencylost+found                       vmlinuz-4.10.0-26-lowlatencydpkg --list 'linux-image*'Desired=Unknown/Install/Remove/Purge/Hold| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)||/ Name           Version      Architecture Description+++-==============-============-============-=================================un  linux-image    <none>       <none>       (no description available)ii  linux-image-4. 4.10.0-26.30 amd64        Linux kernel image for version 4.in  linux-image-4. <none>       amd64        (no description available)Can anyone tell me how to remove these 'no description' packages?Output from df:mick@mick-OptiPlex-745:~$ dfFilesystem                          1K-blocks     Used Available Use% Mounted onudev                                   994400        0    994400   0% /devtmpfs                                  203516     6456    197060   4% /run/dev/mapper/ubuntu--studio--vg-root 151130308 87935772  55494468  62% /tmpfs                                 1017564     5136   1012428   1% /dev/shmtmpfs                                    5120        4      5116   1% /run/locktmpfs                                 1017564        0   1017564   0% /sys/fs/cgroup/dev/sda1                              482922   423090     34898  93% /boottmpfs                                  203516       16    203500   1% /run/user/121tmpfs                                  203516       68    203448   1% /run/user/1000mick@mick-OptiPlex-745:~$ 
Boot partition 93% full with only one kernel unpacked
ubuntu;boot;apt;package management;dpkg