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.

For questions pertaining to environment variables, a set of dynamic variables that can affect the running processes behavior and access to resources. Use this tag for questions about environment varia…
For questions pertaining to Domain Name System (DNS), a service that provides the resolution of host names to IP addresses. Use this tag when you are troubleshooting DNS issues, configuring a DNS reso…
A permanent data storage device used for storing and retrieving digital information using rapidly rotating discs (platters) coated with magnetic material in a rigid form factor (as opposed to floppy d…
A virtual machine (VM) is a guest Operating System running in a completely isolated environment within a normal host operating system. Modern virtual machines are implemented with either software emul…
I/O redirection is used in shell scripting. This feature enables one to take the output of a command and redirect it as an input for another command, or a command can take the input from a file instea…
In computing, memory refers to the state information of a computing system, as it is kept active in some physical structure.
hardware (or its representation by software) that connects a computing device (host) to a computer network (net)
Backing up is the process of making copies (a backup) of data which may be used to restore the original after a data loss event.
1363 questions
Sending, receiving, reading, composing, sorting, and generally working with email. For the mail(1) command line utility, see the tag /mail-command.
1342 questions
Perl is a high-level, general-purpose, interpreted, dynamic programming language. It was originally developed by Larry Wall as a general-purpose Unix scripting language to make report processing easie…
1339 questions
The ls command lists the contents of a directory.
nvidia is used for question particular to the nVidia range of graphic boards/chips and their drivers. Use it only if you know for sure the problem is not a general graphics board issue (in that case u…
tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a separate program, to be created, accessed, and controlled from a single screen. tmux may be detached from …
1320 questions
The process of logging in: from the login prompt, through user authentication, to session startup.
The tar archive format and/or the command-line utility for working with tar files.
1263 questions
General keyboard topics, including keyboard hardware and keyboard functionality in software.
To upgrade is to replace a piece of hardware or software with a better, and usually newer, version or component.
Questions regarding password-based authentication and password management
A lightweight desktop environment for UNIX-like operating systems.
A variable is a name, if correctly chosen with a symbolic meaning, that holds a value or values. Use this tag if your question is specific on the use of variables on shell scripting (if you want to as…
1196 questions
refers to the action of giving a different name to either an existing file or to a copy of a file as part of some other operations (.e.g. remote copy, backup). Use this tag as well for …
1190 questions
File name is a name used to identify a file uniquely on given file system.
1188 questions
Solaris is a Unix operating system originally developed by Sun Microsystems (currently owned by Oracle) as a rebranding of SunOS 4.1.x in 1991.
1188 questions
The "root" account is the most privileged account on a Unix system.
1175 questions
for questions about loading, configuring, or compiling them. See also /drivers for questions about which modules to use for specific hardware. A kernel module is a bit of code that can be…
used to classify questions about date/calendar/time manipulation, visualisation, conversion... on Unix-like systems.
1161 questions
Questions about the IP protocol and IP addresses. For Linux ip utility related questions, use iproute tag instead.
A special type of file that references an inexistent or existing file or directory. The contents of a symbolic link consist of an arbitrary string that is the path to the file that the symbolic link p…
1133 questions
Routing (in IP-based networks) is the process of selecting paths in a network along which to send network traffic.
Globbing means matching files by name patterns containing wildcards.
1083 questions
Udev is a Linux process that manages device file entries under /dev
A free software re-implementation of the SMB/CIFS networking protocol, which provides Windows file and print services. Use this tag when your question involves Samba shares, mounts, or printers.
RPM is a package management system intended primarily for Linux distributions.
1058 questions
Strings are typically delimited by quotes, which raises the problem of dealing with strings that include quotes.
1056 questions
Hard disk space usage: how much space do my files take?
1051 questions
A general purpose operating system built on top of the Linux kernel, developed by the community-supported openSUSE Project.
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