How to reset all environment variables?

Question

I want to make:

env | egrep -o '^\w+=' | unset 

The problem is that:

 env | egrep -o '^\w+=' 

prints things like (pay attention to the equal sign):

XDG_VTNR = LC_PAPER = SSH_AGENT_PID = KDE_MULTIHEAD = LC_ADDRESS = XDG_SESSION_ID =

How to extract only variable names so that I can disable them?

Answer 1

You need something more:

 for i in `env | sed 's/=.*//'` ; do unset $i done 

Note, however, this is likely to do more things than you want. EG, he will also cut off your path!