ii  linux-headers-3.19.0-51                                     3.19.0-51.58~14.04.1                      all          Header files related to Linux kernel version 3.19.0
ii  linux-headers-3.19.0-51-lowlatency                          3.19.0-51.58~14.04.1                      amd64        Linux kernel headers for version 3.19.0 on 64 bit x86 SMP
ii  linux-headers-lowlatency-lts-vivid                          3.19.0.51.36                              amd64        lowlatency Linux kernel headers