Environment variables are text definitions used in a Shell to store important system settings. In a bash shell (the most commonly used one in Linux), you can view all environment variables by executing: set If you want to change an environment variable, you could run: export MYVARIABLE= mycontent For deleting an environment variable, use: unset MYVARIABLE

a named attribute of the system environment under which a program runs. Environment variables can be used to specify the size of Icon's memory regions, the locations of libraries, and so forth.

Environment variables are how SMOKE communicates with its operating environment. There are several different uses for environment variables including assigning file names, setting options, and setting operating parameters. An environment variable in the UNIX environment C-shell is defined using the setenv command. For example, to define the FILENAME environment variable to the file testfile.txt in the /home/user/ directory, the following command is used: setenv FILENAME /home/user/testfile.txt

A named variable that is passed to all processes created by the current shell. See your shell reference page sh ksh(1) or csh(1) for information on setting and reading environment variables.

A variable set in the operating system's command shell. Perforce utilizes environment variables that are passed to the p4 client or p4d server.

a global variable that is part of a CGI process

a magical piece of invisible data that is acted upon by shell programs and utilities that

a shell variable that has been exported or published to the environment by a shell command so that shells and shell scripts executed below the parent shell also have access to the variable

a shell variable that persists

a system-dependent external variable that has a string value

a value (assigned by you, the operating system, or an application) that is available to all commands and applications that run in the same environment

a variable inherited by the child process from his parent process

a variable that defines characteristics of your shell environment

a variable that is part of the user's working environment and is shared by all the programs

a variable used to give programs some basic information about the environment they're running on, like the standard editor to use, where to look for executables, which display to send output to, home directory of the current user

A variable that specifies the operating environment for a process. For example, environment variables can describe the home directory, the command search path, the terminal in use, and the current time zone.

An element of the environment of the shell.

a symbolic substitution that can be used (in some contexts) to construct pathnames and command lines. Some environment variables are pre-defined, some are Windows version-dependent, and they can also be user-defined, e.g. via the SET command in a DOS window. The percent (%) character acts as a delimiter when expanding a string of text containing environment variables. For example the string "%windir%\EXPLORER.EXE" typically would expand to "C:\WINDOWS\EXPLORER.EXE", because there exists a standard environment variable named windir, which is automatically initialized to the path of the main Windows directory on your machine. On some machines, the result may be different, because the Windows directory path might be C:\WINNT, or something else. Environment variables can be used in specifying basic Shortcut properties, not only as a convenient abbreviation, but more importantly as a means of achieving portability.

Character strings of the form name=value. Environment variables are available to an OS/400 job through the set of programming interfaces and CL commands. The environment variables are also addressable through the C language environ array. Environment variables are used to set a working environment for the current job.

A variable set in the user's shell which can be referenced by that user or programs run by that user within that shell. Environment variables are generally used to store preferences and default parameters.

A variable with an assigned value maintained by the operating system and available to all programs.

A variable that describes the operating environment of the process.

(n.) The UNIX® C shell environment variables are similar to shell variable s, except that environment variables can be passed to every C shell that runs. Many applications use environment variables to set configuration directories, specify base directories for commands or data, and pass other information about the user environment to the program.

A string consisting of environment information, such as a drive, path, or filename, associated with a symbolic name that can be used by Windows NT and Windows 2000. Use the System option in Control Panel or the set command from the command prompt to define environment variables.

A variable that specifies how an operating system or another program runs, or the devices that the operating system recognizes.

Special variables that modify your login shell behavior. Typical examples are PATH, which defines the directories in which the shell will search for files or commands, and PROMPT which determines the on-screen shell prompt message. See also variable.

An environment variable is one of a collection of variables stored by the operating system, each one having a name and a value. Emacs can access environment variables set by its parent shell, and it can set variables in the environment it passes to programs it invokes. See section AE.5 Environment Variables.

Any of a number of variables that describe the way an operating system is going to run or the devices it is going to recognize. IBM.

A specification in a program that defines an operating parameter, such as the command path.

A symbol, typically created when a person logs on to the computer, or created from the command line, that can be used by shell scripts and by programs. The collection of environment variables constitutes the environment.

A variable that defines an aspect of your working environment such as your home directory, editor, or printer. Such variables are set during the login/startup procedure.

(env-variable) Named variables managed by the operating system shell and used to store information and communicate between programs. Apache also contains internal variables that are referred to as environment variables, but are stored in internal Apache structures, rather than in the shell environment. See: Environment Variables in Apache

a variable whose value is set outside the program and then passed to the program. SAS/C supports setting environment variables on the command line or batch PARM string in any environment. Some environments provide additional ways to define environment variables.

Environment information, such as a drive, path, or filename, associated with a symbolic name that can be used by MS-DOS. You use the MS-DOS SET command to define environment variables.

A configuration variable that controls some aspect of Maya. Many of the variables are included in the Maya program and are set automatically when you start Maya. To configure Maya further, you can set additional environment variables.

A string consisting of environment information, such as a drive, path, or file name, associated with a symbolic name that can be used by Windows. You use System in Control Panel or the set command from the command prompt to define environment variables. See also: string; variable

Environment variables are a set of dynamic values that can affect the way running processes will behave on a computer.

a name, not a number

a string of environment information such as a drive, path, or file name that is associated with a symbolic name that Windows can use

a system-dependent external named value