I'm on an Ubuntu server and unable to do git pull/ push, git clone through ssh or https, I get these errors:

ssh: ssh: Could not resolve hostname bitbucket.org: Temporary failure in name resolution
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

https: fatal: unable to access 'https://thao0506@bitbucket.org/smartdevllc/oddohr.git/': Could not resolve host: bitbucket.org

How can I do anythings to resolve these errors ?