Could be stupid questions i am newbie in linux so be patient on me 
I wan to add
CHROME_EXCUTABLE=/user/google/chrome
I used export but i understand later this for the current shell i searched for permanent solution but i didn’t understand will 🤦
Add the line to your /etc/environment file.
It needs root or sudo rights to edit. This will make it system-wide and applied at boot.
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You can also read more about Environment Variables here:
There are multiple ways to set the variable per user instead of putting it in /etc/environment if you want to do that.
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Exists a aur package (for inspiration 
)