wget -qO - https://www.mongodb.org/static/pgp/server-5.0.asc | sudo apt-key add -
echo "deb [ arch=amd64,arm64 ] https://repo.mongodb.org/apt/ubuntu focal/mongodb-org/5.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-5.0.list
sudo apt-get update
sudo apt-get install -y mongodb-org

follow the steps from the below link
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/

mongod --dbpath ~/db/data

# How to start and use MongoDB:
a. Enable MongoDB to start at system startup:
$ sudo systemctl enable mongod
b. Start MongoDB Server:
$ sudo service mongod start
c. Check status MongoDB Service:
$ sudo service mongod status
d. Connectiong to MongoDB and Executing some commands:
$ mongosh
$ db.version()
# How to Uninstall MongoDB:
a. Disable MongoDB Service:
$ sudo systemmctl disable mongodb
b. Stop MmongoDB:
$ sudo systemctl stop mongodb
$ sudo service mongod stop
c. Remove packages:
$ sudo apt remove mongodb-org
c. Remove Data Directories:
$ sudo rm -r /var/log/mongodbsudo rm -r /var/lib/mongo
# How to restart MongoDB:
a. sudo systemctl restart mongodb 

sudo apt-get install gnupg

wget -qO - https://www.mongodb.org/static/pgp/server-4.4.asc | sudo apt-key add -