Going to free up Ubuntu system disk space? Try clearing the systemd journal logs, it may free up a few GB of space.
You can also edit the configuration file to limit the journal log disk usage (100 MB for example).
Sandboxing is a computer security technique that focuses on isolating a program or process from parts of a system that it does not need to interact with during normal operation. In this tutorial you will run through a practical demonstration of how to use systemd’s sandboxing techniques on Ubuntu 20.04 for an efficient workflow to implement and to test these techniques. Any process that runs on a Linux system that uses systemd can be made more secure with these techniques.