sandboxctl is a tool to interact with chroot-based sandboxes. The sandboxctl tool provides an automated mechanism to create and interact with chroot-based sandboxes. These sandboxes can be transient (e.g. to run a single command within them) or long-lived (e.g. to run a system service in a safe manner). Sandboxes can be created using multiple mechanisms, which range from extracting fresh distribution sets to bind-mounting the outer file systems inside the sandbox. The specific mechanism depends on the features supported by the underlying operating system and the chosen sandbox type. Currently, sandboxctl includes support for FreeBSD, Linux, macOS (Darwin), and NetBSD. Each sandbox is defined via a configuration file provided by the user and a system-specific template provided by this package. The user configuration is simple and semantically-rich, allowing the system administrator to not worry about the environment-specific details. This is not an official Google product.