A Linux administrator is troubleshooting a server that is responding slowly. The administrator runs the top command to view a real-time list of running processes. To quickly identify which process is consuming the most physical memory, which interactive command should be used within the top interface?
m
R
P
M
The correct answer is M. In the top interactive display, pressing Shift+M (uppercase M) sorts the process list by the %MEM column, allowing an administrator to immediately see which processes are using the most physical RAM. The P key sorts by CPU usage (%CPU). The lowercase m key simply toggles the memory and swap usage lines in the summary area and does not change the process sort order. The R key toggles the current sort column between normal and reverse order.
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