Get the same information from the command line

Most of the information displayed by System Monitor can also be obtained using these command line tools.


provides a continually updated list of running processes, and allows you to manipulate them.


provides a list of open files and the processes that opened them.

free -m

shows you how much memory is available.


provides information about current virtual memory use.

df -h

displays available disk space on mounted filesystems.


displays the memory map of a process.