MongoDB starts an error Process: 29784 ExecStart=/usr/bin/mongod $OPTIONS (code=exited, status=14)

When we use systemctl start mongod to start MongoDB data, the error is as follows

Here we can use the systemctl status mongod.service command to view detailed error information, as shown below

If the error status is status=14, the main reason there is the file permission problem. The user mongod does not have write permission to the necessary files, so the database service cannot be started.

Successful start