Set environment variables from file of key/value pairs

This might be helpful:

export $(cat .env | xargs) && rails c

Reason why I use this is if I want to test .env stuff in my rails console.

gabrielf came up with a good way to keep the variables local. This solves the potential problem when going from project to project.

env $(cat .env | xargs) rails

I’ve tested this with bash 3.2.51(1)-release


To ignore lines that start with #, use this (thanks to Pete’s comment):

export $(grep -v '^#' .env | xargs)

And if you want to unset all of the variables defined in the file, use this:

unset $(grep -v '^#' .env | sed -E 's/(.*)=.*/\1/' | xargs)


To also handle values with spaces, use:

export $(grep -v '^#' .env | xargs -d '\n')

on GNU systems — or:

export $(grep -v '^#' .env | xargs -0)

on BSD systems.

From this answer you can auto-detect the OS with this:


## Usage:
##   . ./ ; $COMMAND

if [ "$unamestr" = 'Linux' ]; then

  export $(grep -v '^#' .env | xargs -d '\n')

elif [ "$unamestr" = 'FreeBSD' ] || [ "$unamestr" = 'Darwin' ]; then

  export $(grep -v '^#' .env | xargs -0)


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