Which Env ?

Edit ~/.bashrc file to permanently store variable or according to your SHELL.

export whichenv = "dev"

Similarly add these variables in other environments like qa, staging, prod, etc.

Reload

source ~/.bashrc

Install whichenv

sudo curl https://raw.githubusercontent.com/sbimochan/whichenv/master/whichenv -o /usr/local/bin/whichenv && sudo chmod +x /usr/local/bin/whichenv

Execute it

whichenv