What command would you use to see a list of all processes running in the system?

Using the command "ps" is the correct choice for displaying a list of all processes currently running in the system. The "ps" command stands for "process status" and is a widely used tool in Unix-like operating systems that provides information about the currently running processes. When executed, it can show a snapshot of the processes, including various details such as the process ID (PID), the terminal associated with each process, the CPU and memory usage, and the command line that initiated the process.

The other commands serve different purposes. For example, "ifconfig" is used to configure and display network interfaces, making it related to network settings rather than process management. "cd" is a command for changing directories within the file system, helping users navigate through folders, and does not interact with processes at all. Lastly, "ll" is a shorthand for listing files and directories in a detailed format, primarily used in file management rather than for viewing process information. Thus, "ps" directly addresses the need to see running processes, confirming its position as the accurate choice.