osmc@osmc:~$ sudo apt-get update
Ign:3 http://ftp.debian.org/debian stretch InRelease
Hit:5 http://security.debian.org stretch/updates InRelease
Hit:6 http://ftp.debian.org/debian stretch-updates InRelease
Hit:7 http://ftp.debian.org/debian stretch Release
Hit:1 http://ftp.fau.de/osmc/osmc/download/dev/gmc-18 gmc-18 InRelease
Hit:2 http://ftp.fau.de/osmc/osmc/apt stretch InRelease
Hit:4 http://ftp.fau.de/osmc/osmc/apt stretch-devel InRelease
Reading package lists... Done
osmc@osmc:~$ sudo apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
osmc@osmc:~$ uname -r
3.14.29-119-osmc