How to force use a specific private key for ssh client?
# ssh -v -i ~/.ssh/your_private_rsa core@<IP address>
Software and its alternatives available:
https://alternativeto.net/It has reviews from users.
One good example:https://alternativeto.net/software/youtube/
Firefox relay:
https://relay.firefox.com/
Avoid sharing your original email ids for subscriptions and strangers. Share relay'd email id instead.==
Another better alternative is:
https://simplelogin.io/