Make your Raspberry Pi file system read-only (Raspbian Buster)

[…] Kiosk applications are often not properly shut down but instead simply unplugged. Repeating this increases the risk of file system corruption.

Luckily on Raspbian Buster you can force your file system into “read-only mode”. While in read-only mode the system cannot write any data to your SD card thus significantly prolonging the lifespan of your card.