I followed all the instructions on this page, and aft apt-get it says
mongodb-org is already the newest version (4.0.10).
but when i start it again and run mongod --version, it still says
db version v3.6.13
How do I switch to the new version?
sudo systemctl status mongodb.service
Loaded: not-found (Reason: No such file or directory)
Active: inactive (dead)