root@pim-HP-Z440-Workstation:/boot# uname -a
Linux pim-HP-Z440-Workstation 4.2.0-22-generic #27-Ubuntu SMP Thu Dec 17 22:57:08 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
root@pim-HP-Z440-Workstation:/boot# apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 44 not upgraded.
root@pim-HP-Z440-Workstation:/boot# dpkg -l | grep linux-image
rc linux-image-3.19.0-15-generic 3.19.0-15.15 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
rc linux-image-3.19.0-25-generic 3.19.0-25.26 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
rc linux-image-3.19.0-26-generic 3.19.0-26.28 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
rc linux-image-3.19.0-37-generic 3.19.0-37.42 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ri linux-image-3.19.0-39-generic 3.19.0-39.44 amd64 Linux kernel image for version 3.19.0 on 64 bit x86 SMP
ii linux-image-4.2.0-19-generic 4.2.0-19.23 amd64 Linux kernel image for version 4.2.0 on 64 bit x86 SMP
ii linux-image-4.2.0-22-generic 4.2.0-22.27 amd64 Linux kernel image for version 4.2.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-15-generic 3.19.0-15.15 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-25-generic 3.19.0-25.26 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-26-generic 3.19.0-26.28 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
rc linux-image-extra-3.19.0-37-generic 3.19.0-37.42 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-3.19.0-39-generic 3.19.0-39.44 amd64 Linux kernel extra modules for version 3.19.0 on 64 bit x86 SMP
ii linux-image-extra-4.2.0-19-generic 4.2.0-19.23 amd64 Linux kernel extra modules for version 4.2.0 on 64 bit x86 SMP
ii linux-image-extra-4.2.0-22-generic 4.2.0-22.27 amd64 Linux kernel extra modules for version 4.2.0 on 64 bit x86 SMP
ii linux-image-generic 4.2.0.22.24 amd64 Generic Linux kernel image
root@pim-HP-Z440-Workstation:/boot# sudo dpkg --remove linux-image-3.19.0-39-generic
dpkg: dependency problems prevent removal of linux-image-3.19.0-39-generic:
linux-image-extra-3.19.0-39-generic depends on linux-image-3.19.0-39-generic.
linux-signed-image-3.19.0-39-generic depends on linux-image-3.19.0-39-generic (= 3.19.0-39.44).
dpkg: error processing package linux-image-3.19.0-39-generic (--remove):
dependency problems - not removing
Errors were encountered while processing:
linux-image-3.19.0-39-generic