The display for active and inactive memory using the vmstat command with the -a parameter.
Vmstat is abbreviation for virtual memory statistics. Vmstat used in as a tool for computer system to monitoring information about system memory, interrupts, processes, paging and block I/O. Vmstat is mostly available in Unix based operating system such as Linux.
Vmstat use parameter command to display information, like -s to display memory statistics and -a to display active and inactive memory.
Attached image for example how to read information display, Inact in vmstat display is for inactive memory that is not being used and active in vmstat display is for active memory that is currently use.
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