Insert the below into the console

export VARIABLE_NAME = VARIABLE_VALUE

To remove the environment variable

unset VARIABLE_NAME

To view the environment variable:

env | grep -i VARIABLE_NAME

Note, for the env | grep -i command, the VARIABLE_NAME can also just be
part of the variable name, eg “proxy” and then any variables
containing that value will display. Eg http_proxy, and htts_proxy
will display if you insert env | grep -i “proxy”.

How to add authorized keys to a server:

View the key:

cat ~/.ssh/id_rsa.pub

Copy and paste the key in here:

sudo nano ~/.ssh/authorized_keys

To check your server’s vpn proxy settings run the following command:

env | grep -i proxy