Set Linux shell environment variable

[dcaccount]

Hello,
in Node Red I need to set a Linux Shell environment variable, for instance SPEAKVOL=10

I tried everything, also to create a shell file:

#!/bin/sh
export SPEAKVOL=$1

and then adding an exec node with the command

source name_of_above_file.sh

but it is not working.
How can I do? Please help!

Thanks,
Dan

[Andrei]

You could set the environment variable in the settings file as explained in below link.

How to set env variable

One way of setting environment variables is in your settings.js file. The following will set the env var MY_ENV_VAR: process.env.MY_ENV_VAR = "Hello World"; You can add lines like that to the top of your settings file. The other option is to set them completely outside of Node-RED in shell you are running Node-RED in. How you do that will depend on your OS and how you are running Node-RED.

[leftymuller]

from my understanding each shell instance has a unique set of environments.

If you run it under a bash script, when the shell ends after the script has run the variable dies with it

[wb666greene]

I would put the command you want to run in the second exec node into the script you want to source and just launch that script in a single exec node. Keeps things self-contained

Environmental variables are not global, but they can look that way because a "standard" set is generally created in various .bashrc and/or .profile files that are highly system dependent and loaded when a new login shell is created and possibly a different or null set when a non-interactive (not attached to a "terminal") shell is launched.

I try to avoid using environmental variables whenever possible.