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Linux Commands to Monitor Memory Usage

Linux Commands to Monitor Memory Usage:

vmstat Monitor virtual memory
free Display amount of free and used memory in the system.
pmap Display/examine memory map and libraries (so). Usage: pmap pid
top Show top processes
sar -B Show statistics on page swapping.
time -v date Show system page size, page faults, etc of a process during execution. Note you must fully qualify the command as "/usr/bin/time" to avoid using the bash shell command "time".
cat /proc/sys/vm/freepages Display virtual memory "free pages".
One may increase/decrease this limit: echo 300 400 500 > /proc/sys/vm/freepages
cat /proc/meminfo Show memory size and usage.


Anonymous said...

Adding atop, htop, dstat to your list

Kam said...

You may also like the following post.

pondoklukman said...

thanks, now i can see memory usage.

aravindragu said...


I have one query

1. How to find the date and time of the user created in the local system ?

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