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How do you append to your PATH and not lose the existing PATH settings?
DGPOLY
You can typically append to an environment variable using a simple self-reference, but the exact syntax required depends on the operating system and "shell" in use.
For example, the console for Microsoft Windows operating systems supports this construct to append "XYZ" to the content of the (previously defined) PATH variable:
set PATH=%PATH%;XYZ
The %PATH% expression is being replaced with the content of that variable, and ;XYZ is appended. This example includes a semicolon, which is traditionally used to separate the elements of the search path definition (which is provided with the PATH environment variable).
Different operating systems and "shells" have different methods not only for defining this modification, but also for making the changes available to other programs (some systems require an explicit use of an export statement), or for making the changes permanent.
In Microsoft Windows operating systems, permanent changes to environment variables are best defined from the Systems property pages (see Advanced System Settings, Environment Variables).
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∙ 11y ago
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