ii  linux-headers-4.4.0-21                      4.4.0-21.37                                         all          Header files related to Linux kernel version 4.4.0
ii  linux-headers-4.4.0-21-generic              4.4.0-21.37                                         amd64        Linux kernel headers for version 4.4.0 on 64 bit x86 SMP
ii  linux-headers-4.4.0-22                      4.4.0-22.38                                         all          Header files related to Linux kernel version 4.4.0
ii  linux-headers-4.4.0-22-generic              4.4.0-22.38                                         amd64        Linux kernel headers for version 4.4.0 on 64 bit x86 SMP
ii  linux-headers-generic                       4.4.0.22.23                                         amd64        Generic Linux kernel headers
ii  virtualbox-guest-dkms                       5.0.18-dfsg-2build1                                 all          x86 virtualization solution - guest addition module source for dkms
ii  virtualbox-guest-utils                      5.0.18-dfsg-2build1                                 amd64        x86 virtualization solution - non-X11 guest utilities
ii  virtualbox-guest-x11                        5.0.18-dfsg-2build1                                 amd64        x86 virtualization solution - X11 guest utilities