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A tag is a keyword or label that categorizes your question with other, similar questions.
DomainKeys Identified Mail is a scheme for signing and verifying email messages to confirm that that the source hasn't been forged, and is typically implemented by MTAs. The source MTA adds a header to the message body containing a signature, and the destination MTA verifies this signature against a key retrieved from DNS.
603 questions
The amount of memory required by a program or the system for a specific task.
602 questions
Perl is a language optimized for scanning arbitrary text files, extracting information from those text files, and printing reports based on that information. It's also a good language for many system management tasks. The CPAN is Perl's module repository and is where users should turn first for code that implements solutions to already-solved problems.
596 questions
Lighttpd ("lighty") is a fast open source web server, optimised for speed critical environments
596 questions
A probably off-topic question relating to the terms and conditions under which a piece of software is permitted to be used by those others. Per the FAQ, licensing questions are generally off topic on SeverFault.
595 questions
Google service that allows for customized versions of Google products under a custom domain.
595 questions
The Preboot eXecution Environment (PXE, also known as Pre-Execution Environment; sometimes pronounced "pixie") is an environment to boot computers using a network interface independently of data storage devices or installed operating systems.
593 questions
Asterisk is software that enables a server to act as an IP PBX system, VoIP gateway, conference server, and more.
593 questions
"Remote Desktop Services" is a component of Microsoft Windows Server 2008 R2 and newer. It allows its users to run applications on a remote server, sending only mouse/keyboard input and screen updates across the network. In previous versions of Windows Server it was known as "Terminal Services".
589 questions
IP address is a numerical label assigned to each device participating in a computer network that uses IP for communication.
586 questions
The Linux kernel is the operating system kernel used by the Linux family of Unix-like operating systems. It is one of the most prominent examples of free and open source software.
585 questions
Compose is a tool for defining and running multi-container Docker applications.
581 questions
ProxyPass in Apache, and proxy_pass in nginx, are directives used to specify which backend or remote server should process the request
578 questions
Transport Layer Security is a cryptographic protocol for encrypting and authenticating network communications, and replaces SSL. It is commonly used to secure Internet protocols such as HTTP.
573 questions
CloudFlare is a content delivery network and distributed domain name server service marketed as improving website performance and speed and providing security.
567 questions
A socket is an abstract network construct with a sending and receiving side. In most modern operating systems (OS) there are device representations, and programming tools to address sockets.
564 questions
This tag should be used to request advice on issues involving a vCenter installation issue or configuration problem.
561 questions
Reverse DNS lookup is the determination of a domain name that is associated with a given IP address using the Domain Name System (DNS) of the Internet.
561 questions
Google Kubernetes Engine is a cluster manager and orchestrator for running Docker containers. It schedules your containers into the cluster and manages them automatically based on requirements you define (such as CPU and memory). It's built on the open source Kubernetes system, giving you the flexibility to take advantage of on-premises, hybrid, or public cloud infrastructure. It was formerly called Google Container Engine.
553 questions
This is a special tag that is designed to be used only by the system for questions that have had all of their other tags removed. Do not add this tag to existing questions, it is reserved for use by the system to identify posts with no valid tags.
552 questions
ELB is Amazon's managed Load Balancer service, used in conjunction with its EC2 virtual machine cloud hosting service.
552 questions
Localhost is an address/term used for testing connection to the local host (current computer) used for some network troubleshooting
549 questions
root is the default administrative account for Unix-based systems. It is comparable to the Administrator account of a Windows system.
548 questions
"The web," or "world-wide web" is a term for the system of hypertext linked documents accessed over the internet, with a web browser. The "www" that comes before most webpages is a reference to the "world-wide web."
542 questions
UDP stands for User Datagram Protocol. With UDP applications can send messages (datagrams) to other hosts on a network without requiring prior communications to set up special transmission channels or data paths.
542 questions
The HTTP response status code 301 Moved Permanently is used for permanent redirection. This status code should be used with the location header.
533 questions
Questions about monitoring server hardware and software performance, or network performance.
531 questions
RAID (redundant array of independent disks, originally redundant array of inexpensive disks[1][2]) is a storage technology that combines multiple disk drive components into a logical unit. Data is distributed across the drives in one of several ways called "RAID levels", depending on what level of redundancy and performance (via parallel communication) is required. RAID 5 is a specific implementation.
530 questions
Redirect a port to another one, used to access a computer from behind a firewall.
524 questions
Uniform Resource Locators are a generic scheme for specifying the location of resources. They are most commonly used for identifying locations on the Internet (such as webpages and email addresses) but can be used to reference almost anything.
519 questions