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. |
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