local mongodb not working ubuntu code example

Example 1: mongodb install in ubuntu

sudo apt update
sudo apt install -y mongodb
//checking service and db
sudo systemctl status mongodb
or service mongodb status
//start service
sudo systemctl start mongod
or service mongodb start
//stop service
sudo systemctl stop mongod  or
service mongodb stop

Example 2: ubuntu mongodb not starting

cd /var/log/mongodb
sudo chown -R mongodb:mongodb .
cd /var/lib/mongodb
sudo chown -R mongodb:mongodb .

Example 3: ubuntu start mongodb

sudo mongod --fork --config /etc/mongod.conf