Which Linux terminal command can be used to display all the processes?

The ps -m flag shows threads associated with processes or memory-related information depending on the implementation, not a complete list of all processes.

The ps -u flag filters and displays processes owned by a specific user, not all processes system-wide.

The ps -d flag selects all processes except session leaders, resulting in an incomplete view of all running processes.

The ps -ef command combines two flags: -e selects all processes regardless of owner or terminal, and -f produces a full-format listing that includes UID, PID, PPID, CPU usage, start time, and the complete command string. This combination is the standard method used to view every running process on a Linux system.