Operating System Articles - Page 35 of 199

CPU scheduling is a crucial aspect of operating systems that determines the order in which processes are executed on the central processing unit (CPU). Two important metrics used to evaluate the efficiency of CPU scheduling algorithms are Turn Around Time (TAT) and Waiting Time (WT). Understanding the difference between these two metrics can provide insights into the performance and responsiveness of a CPU scheduling algorithm. What is Turn Around Time (TAT)? Turn Around Time (TAT) is the total time taken for a process to complete its execution from the moment it enters the system until it finishes. It includes both ... Read More

Disk scheduling is a crucial component of operating systems that manages the order in which disk requests are serviced. When analyzing disk performance, two important metrics to consider are Transfer Time and Disk Access Time. Understanding the difference between these metrics can provide insights into the efficiency and responsiveness of disk scheduling algorithms. What is Transfer Time in Disk Scheduling? Transfer time, also known as data transfer time, is the time required to move a block of data between the disk and the main memory. It is primarily determined by the speed at which the disk can transfer data. The ... Read More

In computer systems, there are various techniques and mechanisms employed to manage and optimize the execution of processes and tasks. Two such techniques are swapping and context switching. Although they both play a role in improving system performance and multitasking capabilities, they serve different purposes and operate at different levels within the system. Let's delve into the difference between swapping and context switching. What is Swapping? Swapping is a technique used in operating systems to manage memory resources efficiently. It involves moving an entire process or a part of it from main memory (RAM) to secondary storage (such as a ... Read More

Context switching is a fundamental operation performed by an operating system to manage multiple threads or processes in a multitasking environment. It involves saving the current execution context of a thread or process and restoring the execution context of another thread or process. This allows the operating system to quickly switch between different threads or processes, giving the illusion of concurrent execution. There are two types of context switches: "thread context switch" and "process context switch". Let's explore the differences between them. What is Thread Context Switch? A thread context switch refers to the process of saving the current ... Read More

An operating system (OS) is a group of programs that controls computer hardware resources and offers standard services to software applications. It serves as a conduit between the user and the hardware. It is accountable for carrying out all procedures. There are many operating systems available for mobiles, pc etc., AIX and Chrome OS are such operating systems. The following are the differences between them. What is AIX OS? Advanced Interactive executive is commonly referred to as AIX. IBM created the AIX operating system in 1986. The organization originally created this operating system for RT PC RISC workstations, but ... Read More

In UNIX−based operating systems, such as Linux, there are two types of CPU time that are commonly measured: user CPU time and system CPU time. These metrics provide insights into how the CPU resources are being utilized by different components of a system or process. Understanding the difference between user CPU time and system CPU time is essential for performance analysis and troubleshooting. What is User−CPU−Time in UNIX? User CPU time represents the amount of CPU time spent executing in user mode, which is the mode where application code runs. It includes the time spent executing the user's program ... Read More

An operating system (OS) is a group of programs that controls computer hardware resources and offers standard services to software applications. It serves as a conduit between the user and the hardware. It is accountable for carrying out all procedures. There are many operating systems available for mobiles, pc etc., AIX and Android are such operating systems. The following are the differences between them. What is AIX Operating System? Advanced Interactive executive is commonly referred to as AIX. IBM created the AIX operating system in 1986. The organization originally created this operating system for RT PC RISC workstations, but ... Read More

Introduction Proxy servers are intermediary servers that act as a gateway between a user's device and the internet. When connected to the internet through a proxy server, all data requests from the user's device are first sent to the proxy server which then forwards them to the internet. Similarly, when data is received from the internet, it first goes through the proxy server before reaching the user's device. There are several types of proxies including HTTP proxies, HTTPS proxies and SOCKS proxies. Each type of proxy serves different purposes with varying degrees of security and privacy. Understanding Proxy Settings on ... Read More

Introduction Configuring Postfix and Dovecot with virtual domain users is an essential process for anyone running a Linux-based email server. These two software applications are the backbone of email servers, and they work together to handle incoming and outgoing emails. Postfix is the mail transfer agent responsible for accepting incoming emails. On the other hand, Dovecot is the email delivery agent responsible for delivering incoming emails to users' mailboxes. In this article, we will provide a detailed guide on how to configure Postfix and Dovecot with virtual domain users in Linux. Explanation of Postfix and Dovecot Postfix is ... Read More

Introduction In today's digital age, security is of utmost importance. The rise of cyber threats and data breaches has shown that no system is completely safe. System administrators and IT professionals must take proactive measures to protect their systems and data. One such measure is the use of Pluggable Authentication Modules (PAM) for user authentication. PAM is a powerful tool that allows system administrators to customize the authentication process for their systems. It enables the use of multiple authentication methods, such as passwords, tokens, and biometrics, among others. This flexibility makes it easier for administrators to manage access ... Read More