Sometimes when I open SQL Server Management Studio (SSMS) I lose time thinking and trying to figure out what is the name of my LocalDb.
The solution is simple: open the terminal and run
SQLLocalDb.exe i, where i stand for information.
Now you can see the list of configured DBs.
To use it in SSMS remember to use Windows Authentication.
If you need more info about a specific instance, just run
SQLLocalDB.exe i "InstanceName" where of course InstanceName must be replaced with your real name you are looking for.
This command displays some info about the specified SQL instance: this info include the version, the owner and the current state.
If you want to have a list of all available commands, run
SQLLocalDB.exe -?. These commands allow you to create and delete SQL instances, stop and start existing instances and so on.
It's important to remember that here the spaces are treated as delimiters, so if your DB includes spaces inside its name, you must surround the name with quotes.