memory – POFTUT

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What Is an Operating System (OS)? 0

What Is an Operating System (OS)?

An operating system is a software which is used to operate, use computer or server hardware and provide these sources to the user applications. Operating systems is an intermediate software which is very important for computers and servers because it provides a lot of different services to the user side applications. Operating System History Operating system history consists of mainly 4 phases. First Generation (1945-1955) First operating systems are created...


What Is ROM (Read Only Memory)?

ROM stands or Read Only Memory. Memory is a component where we store information about the system. Read Only means we can only read information or data from memory and cannot change and write to the memory. Read Only Memory is especially useful when we only need some data to start a system or run simple tasks. ROM Types As ROM usage is very popular in computers, laptops, PC’s, servers,...


How To Use vmstat To Monitor Linux Performance

Linux distributions provides a lot of tools in order to monitor system performance. vmstat is one of the most used tool for system performance monitoring. vmstat can collect and report information about memory, cpu, swap, io in a detailed way. In this tutorial we will examine the output of the vmstat and different features and options of it. List System Resource Usage We will start by using vmstat command without any option. This will...


How To Use Linux dmesg Command To Print System Logs?

dmesg is used to print and control kernel ring buffer. This explanation may be confusing for the most of the readers. Here simplified explanation. dmesg provides logs for troubleshoot, diagnose or save which is created by Linux kernel. It provides low level messages which is not logged by other subsystems. Provided Information Type dmesg command and buffer provides a lot of different type of messages and logs. Here the list...


Monitor Linux Cpu, Memory Performance with Htop

top is very popular and well known system monitoring tool provided by default by most of the Linux distributions. htop is more eye candy and more professional system monitor tool which is provided by most of the Linux distributions. In this tutorial we will look how to install and use  htop command to monitor cpu, memory etc. Linux Top – Monitor Linux System Resources Cpu, Memory, Network We can use...


Linux ps Command Tutorial List Processes with Examples

Processes are the one of the main parts of the operations systems. All user side even kernel side operations are executed with process. Process generally created, run and killed. This life cycle of the process generally the same. During this life cycle we may need to get more information about processes. ps command is most used command to list and get information about processes. List Current User Processes Process can be...


Windows Process Explorer To Get Detailed Information About Processes

Windows provides different tools to list and get information about processes. The task manager can be used to list and manage process. But task manager have limited capabilities. So if we are a pentester or system administrator who lives in deep water we can use process explorer for more functionality. Download Process explorer is provided as Sysinternal utilities and downloaded from following link as zipped file. In order to...


Display Detailed System Information With Systeminfo For Windows Operating Systems

Windows operating system have a lot of third party tools used to get detailed system information like operating system, version, boot time, processor etc. We will look simple single command systeminfo to get detailed system information. List Information We will just issue the systeminfo command to get information about the computer.

We will get following information about the computer. Host Name OS Name OS Version OS Manufacturer OS Configuration OS Configuration...


All About DDR4 Ram Like Frequency, Price, Performance

In computing RAM or Random Access Memory is very important. RAM technology is evolving in years. At the end of 90’s we were using 128 MB RAM. Yes 128 MB it is not joke. Today we are talking about 64, 128 GB RAMs for Laptops and Desktops. In this tutorial we will look details about DDR4 RAM and memory technology. Release First DDR4 is released in to market 2014. Capacity...


Linux Time Command Tutorial With Examples To Get Programs Resource Usage

Linux time command provides commands and programs usage statistics especially as CPU load. Time command gets real command as parameter like below. Time taken in user mode Time taken in kernel mode Time taken in real mode Memory usage Syntax We will use following syntax for time command.

Run If we run the time command without any option  we will see following output. In this example we want to run...

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