wyrd

running sudo while you are root is redundant, sudo (superuser do) is intended for normal users to run some commands as root to fix DNS issue add this to the file /etc/hosts 127.0.0.1 localhost 127.0.1.1 bpi-iot-ros-ai # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters for the eMMC i think there is a tool they call  bpi-copy as they state:  "support bpi-copy to write SD/eMMC with img.zip file" but as @martinayotte  already told your "dd" worked and you copied to eMMC.
 

Read: https://community.teamviewer.com/t5/Knowledge-Base/How-do-I-install-TeamViewer-on-my-Linux-distribution/ta-p/4351#toc-hId-850221972
 
You need ARM64 not armhf deb packages if there is one.
 
* i have not found teamviewer arm64, maybe you need to install some 32 bit support.

not sure i would work but try and cross your finger:
  sudo dpkg --add-architecture armhf sudo apt-get update sync sudo apt-get install libc6:armhf sync sudo reboot * update: you may need some other lib, just use package:armf when install * Update2: you may need also this: sudo apt-get install libstdc++6:armhf if some other 32 lib is required to run teamviewer, try: file teamviewer (the binary) to find more about.