Doctl installer for Ubuntu/Debian that Doesn't use snap.
Just download the DEB file and run
sudo gdebi doctl-1.68.0-linux-amd64.deb
Or download from the browser and install by double clicking the DEB file.
Tip: Add these to your .bashrc
if you are going to use doctl constantly, you don't need all of these four envvars
export DIGITALOCEAN_TOKEN="PUT-TOKEN-2-HERE"
export VENDOR_PORTAL_ADMIN_TOKEN="PUT-TOKEN-2-HERE"
export MARKETPLACE_RO_CLOUD_TOKEN="PUT-TOKEN-3-HERE"
export SSH_KEY="YOUR-AUTHORIZED-SSH-KEY-FINGERPRINT"