root@tabuntu:~# dpkg --list | grep linux-image
ii  linux-image-4.4.0-81-generic                  4.4.0-81.104                                  amd64        Linux kernel image for version 4.4.0 on 64 bit x86 SMP
ii  linux-image-extra-4.4.0-81-generic            4.4.0-81.104                                  amd64        Linux kernel extra modules for version 4.4.0 on 64 bit x86 SMP