A system resource is any usable part of a computer that can be controlled and assigned by the operating system so all of the hardware and software on the computer can work together as designed. System resources can be used by users, like you, when you open programs and apps, as well as by services which are usually started automatically your operating system. Note: A system resource is sometimes called hardware resource, computer resource, or just resource.
Resources which needs to be managed
|primary memory||Primary Storage is the area in the computer where data is stored for quick access by the computer's processor. RAM is often synonymous with this term.|
|secondary storage||Secondary storage is storage that is non-volatile, meaning that the data is kept even when the device is turned off. The data within a secondary storage device is also held until deleted or overwritten. Examples of secondary storage devices are: Hard Drives (HDD), Solid-StateGive a specific name, value or other brief answer without explanation or calculation.Give a specific name, value or other brief answer without explanation or calculation. Drive (SSD), Floppy Disks and USB Drives.|
|processor speed||Measured in MHz (megahertz) and GHz (gigahertz), this is the numberA unit of abstract mathematical system subject to the laws of arithmetic. of instructions per second that the processor can execute. The CPU asks the OS for specific tasks using a bootloader (a bootloader is a computer program that loads the operating system when the computer powers on) and interrupts. Interrupts are signals to the processor that alerts the processor to a high-priority condition requiring the interruption of the current task the processor is executing.|
|bandwidth||Bandwidth, which is the amount of data that can be transmitted in a fixed amount of time, is expressed in multiples of bits per second in digital devices. In analog devices, it is expressed in hertz. A "bus" with low bandwidth can hamper a fast hard drive. The operating system allocates bandwidth to each program, input or output method.|
|screen resolution||NumberA unit of abstract mathematical system subject to the laws of arithmetic. of distinct pixels in each dimension that can be displayed. It is usually quoted as width × height for example, "1024 × 768." The Screen resolution depends on the operating system (OS), as such one can change the screen resolution through the OS.|
|disk storage||Disk storage is a storage mechanism where data is recorded using various methods : Electronic, magnetic, optic or mechanical. Disk storage is stored by a computer processor and communicates within a computer with the use of input and output operations (I/O). Disk storage is managed by the operating system by determining when to read and write from a storage point.|
|sound processor||Sound card - provides input and output of audio signals to and from a computer. Most sound cards use a digital-to-analog converter (DAC), which converts recorded or generated digital data into an analog format. The output signal is connected to an amplifier, headphones, or external device|
|graphics processor||A graphics processing unit (GPU) is a specialized electronic circuit designed to rapidly manipulate and alter memory to accelerate the creation of images in a frame buffer intended for output to a display device. |
|cache||Cache memory is a small-sized type of volatile computer memory that provides high-speed data access to a processor and stores frequently used computer programs, applications and data. It is the fastest memory in a computer, and is typically integrated onto the motherboard and directly embedded in the processor or main random access memory (RAM).|
|networka group or system of interconnected people or things. connectivity||Networka group or system of interconnected people or things. connectivity relates to management of the hardware (networka group or system of interconnected people or things. interface card) and the proper realization of the OSI model. Please see OSI model for a deeper understanding.|
Tools you can use to manage different parts of the Linux operating system
|The OS manages||Linux tools you can use to understand what is going on|
|Memory||top, htop, free, vmstat|
|Files||File system, df, du, mount, lsof|
|Security||fstab, last, who, /var/log/auth.log|
|Devices, Device I/O||iotop, iostat|
|Networksa group or system of interconnected people or things.||netstat, top, tcpdump, iptraf, iftop, nmon|
an excellent video to get you started
an image to help you see this in contextThe circumstances that form the setting for an event, statement, or idea, and in terms of which it can be fully understood and assessed.
This image is used with gratitude from good old wikipedia! 
- IdentifyProvide an answer from a number of possibilities. Recognize and state briefly a distinguishing fact or feature. the resources that need to be managed within a computer system.
- EvaluateAssess the implications and limitations; make judgments about the ideas, works, solutions or methods in relation to selected criteria. the resources available in a variety of computer systems.