What is shared memory and discuss the command used to view shared memory segment information.

Physical Memory Subsystem
You must have successfully completed the Week 1 assignment before moving on to any assignment from this point forward. If you have not installed your Linux virtual machine and successfully located the “terminal” – please do so at this time.
For this assignment you will take a tour of the Physical Memory Subsystem on your Linux Virtual Machine.
Your Task
Locate and utilize performance analysis tools to determine characteristics of Physical Memory and how it is utilized and managed by your version of Linux.
Start your Linux Partition and open the Terminal. Do not open any other applications at this time. Determine values for each of the following. Provide screenshots of command output.
Total Physical Memory
Used Memory
Free memory
Amount of memory used by buffers in the kernel
Size of the page cache (Memory used for holding physical memory page tables)
Amount of memory containing “dirty” pages
Amount of memory being used for page tables
3 Processes using the most memory
Process name
Amount of memory used
Amount of resident memory
Amount used for shared memory
Shared memory
Number of shared Memory Segments
Total size of all shared memory segments
· Now open some applications and leave them open. i.e. Firefox, multiple office apps, and as many other applications as you can while still maintaining a Linux system that functions(even if slow).
Now repeat all of the data gathering steps from above and record new values
Document before and after values and answer the following questions in Summary
Which values changed and why? Which values remained the same and why
What is the page cache
What are page tables
What is resident memory
What is shared memory and discuss the command used to view shared memory segment information
Submission Requirements
You will submit a Word or Libre Writer Document which contains results from the above analysis and responses. I do not have access to your system so you need to be sure to provide screenshots for anything I cannot possibly know. If you tell me your system has 10GB of memory, I need proof via screenshot of command output.
Please insert your screenshots into your word document with supporting documentation which meets all requirements. You will be penalized for any results which are not backed by proof.

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