The name and location will vary slightly between operating systems. The table shown here describes the defaults for the four major operating systems covered in the previous section on installation:
| OS | MongoDB configuration file |
| DEB-based | /etc/mongod.conf |
| RPM-based | /etc/mongod.conf |
| Windows | C:\Program Files\MongoDB\Server\4.x\bin\mongod.cfg |
| Mac OS X | /usr/local/etc/mongod.conf |
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Before getting into the details, let's have a look at the syntax.