apt update && apt upgrade -y && apt install linux-headers-current-rockchip64
Hit:2 http://ports.ubuntu.com focal InRelease
Hit:3 http://ports.ubuntu.com focal-security InRelease
Hit:4 http://ports.ubuntu.com focal-updates InRelease
Hit:5 http://ports.ubuntu.com focal-backports InRelease
Hit:1 https://minio.k-space.ee/armbian/apt focal InRelease
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
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.
Reading package lists... Done
Building dependency tree
Reading state information... Done
linux-headers-current-rockchip64 is already the newest version (21.02.2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
and still no results (the tar file i got from the linux sources);
ls -l /usr/src
total 995584
drwxrwxr-x 8 root root 4096 Aug 7 2019 libgpiod-1.4.1
-rw-rw-r-- 1 dwinz dwinz 1019463680 Feb 22 14:12 linux-5.10.17.tar
drwxr-xr-x 23 root root 4096 Feb 22 06:28 linux-headers-5.10.16-rockchip