How do you set environment variables for a single command on Windows?



A common task for system administrators and developers is setting environment variables for a single command on Windows. This can be a useful tool for quickly testing out new settings or making temporary changes to an existing environment.

When an environment variable is set, it is available to all programs in the current session. This means that the variable will be available to the command line and all programs launched from the command line. Setting an environment variable for a single command, however, can be a bit tricky.

The first step is to open the command prompt with administrative privileges. This will ensure that the environment variable will be available to all programs launched from the command line.

Once the command prompt is open, you can set the environment variable for a single command using the “set” command. This command takes two parameters, the name of the environment variable and the value of the variable. For example, to set the environment variable “TEST” to the value “1234”, you would use the command:

set TEST=1234

Once the environment variable is set, you can then run the command that you wish to use it with. The environment variable will be available to the command and any programs launched by the command.

If you wish to set the environment variable for more than one command, you can use the “setx” command. This command takes three parameters, the name of the environment variable, the value of the variable, and the “persistent” option. The persistent option will make the environment variable available to all programs that are launched from the command line, even after the command prompt is closed. For example, to set the environment variable “TEST” to the value “1234” and make it persistent, you would use the command:

setx TEST 1234 /M

Once the environment variable is set, you can then run the commands that you wish to use it with. The environment variable will be available to all programs launched from the command line.

It is important to note that setting an environment variable for a single command does not make the variable available to programs launched outside of the command line. If you wish to make the environment variable available to all programs, you must use the “setx” command with the persistent option.

Setting environment variables for a single command on Windows can be a useful tool for quickly testing out new settings or making temporary changes to an existing environment. By using the “set” and “setx” commands, you can easily set environment variables for a single command or make them persistent for all programs launched from the command line.

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