A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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the generic term for a UNIX-like open source operating system based on the Linux kernel.
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Version 2.2 of the Apache HTTP Server. When asking questions about virtualhosts, please include the output of the following command: "apache2ctl -S" (or "httpd -S" depending on your OS)
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the brand name for a series of operating systems from Microsoft. Instead of tagging a post "Windows", try to use a more specific tag, like windows-7, windows-xp or windows-server-2008-r2 …
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a Debian derivative that aims to bring Linux mainstream. Questions on this site should generally refer to Ubuntu Server. Note that http://askubuntu.com is specifically dedicated to Ubu…
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Networking refers to the technologies and techniques that enable the interconnection of devices and applications allowing them to communicate electronically.
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is for use with questions which no longer have a valid, on-topic tag due to changes in topicality rules and tag clean up efforts, as well as a merge target for getting rid of the lar…
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a Microsoft server operating system released in February 2008. It is the successor to Windows Server 2003 and is based on the Windows Vista codebase. It was succeeded by Windows…
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The Domain Name System, usually referred to by the acronym DNS, is a hierarchical, distributed database where the keys are domain names.
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a free (as in beer and speech) GNU/Linux distribution that is community driven and based on source code released from RedHat.
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a lightweight, high-performance Web server and reverse proxy as well as IMAP/POP3 proxy server.
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an open-source database owned by Oracle.
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A Microsoft technology for sharing one set of user accounts, security permissions, and management information across many Windows servers and desktops.
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a general-purpose scripting language that is especially suited for Web development. The online manual is an excellent resource for the language syntax and has an extensive list of the built-in …
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a Microsoft server operating system released in April 2003. It is the successor to Windows Server 2000 and is based on the Windows XP codebase. It was succeeded by Windows Serve…
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a protocol primarily for encrypted shell connections. This tag is also used for questions about sshd and openssh, the two standard applications for using SSH.
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not a product, but a process.
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The server configuration of email, including POP3, SMTP, IMAP, and popular server software packages that control email.
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a popular and influential GNU/Linux distribution. Questions here should generally be about Debian Server.
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an operating system from Microsoft. It is an update of Windows Server 2008. Unlike Server 2003 R2, this R2 is a fully new Operating System. It is only available in 64-bit ver…
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Questions related to Microsoft SQL Server. If your question is version specific please tag it specifically for that version as well. Does your SQL Server question belong here or on another site? Click…
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Amazon Elastic Compute Cloud (EC2) provides self-service, on-demand, pay-for-what-you-use computing infrastructure resources.
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Internet Information Services, the web server included with Microsoft's Windows Server operating systems. This is a generic tag. Wherever possible please use a *version-specific* tag, such a…
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the userspace command line program used to configure the Linux 2.4.x and 2.6.x IPv4 packet filtering ruleset. It is targeted towards system administrators. Please, when asking a qu…
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encryption and authentication protocols that encrypt the full contents of a TCP connection, as well as potentially verifying the identities of the devices making the co…
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Free and open source mail transfer agent (MTA) that routes and delivers email. When asking about postfix problem, please include the relevant maillog lines and output of the following command: "postco…
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Making copies of data so that the copies may be used to restore the original after a data loss event, or for historical retention.
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the acronym for Virtual Private Network - a network type that uses a the Internet to provide remote networks or single machines with secure access to their organization's network avoiding expen…
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the Microsoft PC operating system released in October 2009. It is the successor to Windows Vista and has been succeeded by Windows 8. It shared the same UI style as Windows Vista, but w…
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a group of software technologies that allow abstraction between layers of a system. This allows separation between the logical layers of the system, providing isolation, flexibility,…
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In computing, permissions (often called "privileges," "access rights" or just "rights") are rules associated with objects on a computer or network. Permissions determine which objects can access which…
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an application or hardware device used to inspect and filter network traffic.
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RAID, an acronym for Redundant Array of Independent Disks (sometimes incorrectly referred to as Redundant Array of Inexpensive Disks), is a technology that provides increased storage functions and rel…
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Questions about server hardware and software performance, or network performance.
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Refers to the software or hardware that make up a webserver, delivering content on a private or public website.
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Amazon Web Services (AWS) delivers a set of services that together form a reliable, scalable, and inexpensive computing platform "in the cloud". If you have a question about a specific web service, co…
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delivery of email messages, however it has many other features such as calendaring, contact lists and to-do lists.