It shows this
"
root@armbian:/tmp/DietPi-Installer# cd /tmp
curl -sSfL ‘https://apt.armbian.com/armbian.key
curl: (3) URL using bad/illegal format or missing URL
"
but
I download this file from my windows and transport the file to rk3399 device,and install the key
"
root@armbian:/tmp/DietPi-Installer# root@armbian:/tmp# sudo apt-key add armbian.key
Warning: apt-key is deprecated. Manage keyring files in trusted.gpg.d instead (see apt-key(8)).
OK
"
what is next to do?
One other problem show up after reboot
[ TIME ] tIMED OUT WAITING FOR DEVICE DEV - TTYS0.DEVICE - /DEV/TTYS0
[DEPEND] Dependcy failed for seri…rvice - Serial Getty on ttys0.
What should I do to know or slove this problem or is it a hardware problem?
anyway thank you for your help