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Phil Bull
philbull@gmail.com 2011
Michael Hill
mdhillca@gmail.com 2014
Information in System Monitor can also be found using command line tools.

# 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.

top | provides a continually updated list of running processes, and allows you to manipulate them.
lsof | provides a list of open files and the processes that opened them.
free -m | shows you how much memory is available.
vmstat | provides information about current virtual memory use.
df -h | displays available disk space on mounted filesystems.
pmap | displays the memory map of a process.