Installation details
Installing from apt repo on Debian testing, following the getting started guide.
I’m just regurgitating here, but AFAIU, there’s been a bug for awhile in gpg where it’s creating apt-compatible GPG keys though it shouldn’t, so that the instruction in the guide,
sudo gpg --homedir /tmp --no-default-keyring --keyring /etc/apt/keyrings/scylladb.gpg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys a43e06657bac99e3
works. Recent updates have fixed this, so i now creates the proper format, which is not apt compatible (source on github: /freedomofpress/dangerzone/issues/1052#issuecomment-2594065503).
This means apt-update will fail to include the Scylla repo, and installation will fail. One solution, inspired by a random fix elsewhere (also on github: /freedomofpress/dangerzone/commit/1398c4d354822b2cdd67cdea857f73ce6117cf6c):
sudo apt install qv
sudo sq network keyserver --server hkp://keyserver.ubuntu.com:80 search a43e06657bac99e3 --overwrite --output /etc/apt/keyrings/scylladb.gpg
This now leaves a valid key for apt, and I can continue the installation.
Just FYI, gotta go install and play around now 
#ScyllaDB version: Latest one, not sure, haven’t installed it just yet
#Cluster size:
os (RHEL/CentOS/Ubuntu/AWS AMI): Debian Trixe (testing)