Found 2065 Articles for Operating System

Abstract Remote management of UNIX/Linux/BSD servers via an ssh session is a common practice. For installation, you might need to download the software or other files. For Linux operating systems, a few strong graphical download managers are available. However, the non-interactive downloader is preferred when using the wget command at the command line or shell prompt. The wget command supports a wide range of settings and Internet protocols, including HTTP, FTP, HTTPS, and others. One of the simplest uses of the wget command is to download a single file and place it in the directory where you are currently working. ... Read More

Abstract When working in a Linux environment, you have the freedom to decide how you want to download your files from a transparent URL. The majority of users are accustomed to Linux's interactive method of downloading such files. This interactive method involves using a web browser, where a user clicks on a download button that is available and waits until the file download has begun and is successfully finished. An alternate method for obtaining network-based files through a non-interactive or command-line environment is the free GNU software Wget. The Wget utility's non-interactive property suggests that your file downloads can proceed ... Read More

Abstract On Linux servers under heavy load, "too many open files" problems occur frequently. It denotes that a process is unable to open new files (file descriptors) because it has opened too many already. The "max open file limit" is predetermined by default for each process or user on Linux, and the settings are modest. The number of concurrent files descriptor users and processes is constrained. The "Too many open files error" appears when the limit is reached when the user or process tries to open more file descriptors. Therefore, increasing the maximum number of file descriptors a user or ... Read More

Abstract There may be a situation where, despite the fact that no one is attempting to access the share to your knowledge, you are unable to unmount it. This is typically seen while mounting a share. The potential error that you could experience is "the file is busy", or we may occasionally see the notice "the file is busy" when attempting to access a file. This indicates that a process is active on the system that is using the file and keeping it open for reading or writing. Sometimes, when this occurs, we'll want to figure out which process is ... Read More

Abstract Characters are used in source code, command lines, and the majority of computer interaction. The majority of characters, on the other hand, are not represented by keys on a standard keyboard, and many are not even readable. Another category of characters is complicated control characters. We'll talk about character escape in Bash in this tutorial. We'll start off by briefly outlining how computers represent characters. First, we examine the various string types in Bash. The character escape in only Bash is then thoroughly described. Note − Linux commands are case-sensitive. Strings in Bash Since a key does not represent ... Read More

The web operating system is a user interface based on the internet that allows users to access computers locally and through the internet. An operating system is a software that acts as an interface between computer applications and hardware. Web operating system does not directly interact with computer hardware, it is a dummy operating system. Instead, it depends on a traditional operating system for its work. It acts as an interface for systems that are distributed, for instance, distributed cloud computing systems like a cloud. Web OS are created using AJAX and FLASH. AJAX (Asynchronous javascript And XML) ... Read More

Volatile data is not permanent data and this data can be lost when a computer loses its power connection or is switched off. It is usually stored in cache memory or RAM. Random access memory(RAM) is volatile memory used to hold instructions and data of currently running programs. This memory loses integrity after loss of power. Volatile memory is also referred to as temporary memory. It is the memory hardware that fetches or stores data at a high speed. RAM and cache memory are some common examples of volatile memory. Volatile information can be collected remotely or onsite. If ... Read More

Introduction Virtual memory − Virtual memory is a mechanism used to manage memory using hardware and software. It is a part of the secondary storage that gives the user an illusion that it is a part of main memory. It helps in running multiple applications with low main memory and increases the degree of multiprogramming in systems. Job pool −Job pool is a type of data structure in a batch processing system where various jobs are queued to be implemented when all the resources are made available. When a job is executed, it is fully present in memory. Job pools ... Read More

Virtual memory in an operating system is a space where large programs can store themselves in form of pages while their execution and only the required pages or portions of processes are loaded into the main memory. It is a technique that allows the execution of processes that are not completely in the physical memory.This technique is useful as a large virtual memory is provided for user programs when a very small physical memory is there. It is a part of the secondary storage that gives the user an illusion that is a part of the main memory. Why ... Read More

The operating system can be observed from the point of view of the user or the system. This is known as the user view and system view respectively. An operating system is a framework that enables user application programs to interact with system hardware. The operating system does not perform any functions on its own, but it provides an atmosphere in which various programs and apps can do useful work. The operating system may be observed from the point of view of the user or the system, and it is known as the user view and the system view. In ... Read More