The correct option is snapshot. Btrfs, a modern file system for Linux, provides a feature that allows for creating a readable/writable "snapshot" of a subvolume. Snapshots are a powerful tool for data protection and efficient use of disk space.

In Linux, the jobs command is used to display the status of jobs in the current session. It provides information about background processes or jobs started within the current shell session.

The ip command in Linux can be used to manipulate or display IP routing tables. It's a powerful and versatile tool for configuring network interfaces, routes, tunnels, and more. Unlike older commands like route and ifconfig, ip is considered a modern and more comprehensive replacement.

To trace the system calls made by an application on Linux, you would use the strace tool. It provides detailed information about the system calls, signals, and other interactions the application has with the operating system, which is valuable for debugging and analysis.