I have just upgrade to Piaware 8 running on a Pi 4. After upgrading it suggested I “auto remove” lots of packages - so I did (DOH!)
Then I read this
Known Issues
“* Upgrading via sudo apt full-upgrade will errorneously remove the piaware-release package. Please avoid upgrading using this for now as this will be fixed in a minor release shortly.”
Too late!!
How do I get Piaware back
reinstall the packages with sudo apt update and sudo apt upgrade 
or use the options via the Piaware stats page cogwheel
I tried this - is this not correct?
pi@FlightAware-Pi:~ $ sudo apt install piaware
Reading package lists… Done
Building dependency tree… Done
Reading state information… Done
piaware is already the newest version (8.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
pi@FlightAware-Pi:~ $
I used to access piaware by just typing in the IP of the Pi - I presume this has not changed
Skyaware is working fine
I would use the cogwheel option first
wget https://flightaware.com/adsb/piaware/files/packages/pool/piaware/f/flightaware-apt-repository/flightaware-apt-repository_1.1_all.deb
sudo dpkg -i flightaware-apt-repository_1.1_all.deb
sudo apt-get update
sudo apt-get install piaware
sudo piaware-config allow-auto-updates yes
sudo piaware-config allow-manual-updates yes
sudo apt-get install dump1090-fa
sudo reboot
Thanks for your help.
At every step it says everything is up to date and nothing to install.
I might download a fresh image and start again!
Try
sudo apt-get install piaware-release
(nb: this is correct only for piaware sdcard images, don’t do this on a regular package install)
Many thanks indeed - all sorted