In Linux: run the following commands and take screenshots:

Check the memory usage using the free command: free $-$m

Check the memory usage using the $/$proc$/$meminfo: cat $/$proc$/$meminfo

Check the memory usage using the vmstat command: vmstat

Check the memory usage using the top command: top $-$b $|$ head $-10$

Explain the commands and include screenshots of the results in the paper.