Linux bash - extract value from grep output

Question

I have variable $OUTPUT=abc PHYSIN=lalala ghi

How can I extract the value of PHYSIN into another new variable called VETH_NAME, in other words, I'd like VETH_NAME to be lalala

How can I do so using bash commands?

Thanks

Answer 1

Assuming this is what you are saying :

OUTPUT="abc"
PHYSIN="lalala ghi"


VETH_NAME=$(echo "$PHYSIN" | cut -d" " -f1)

finally :

echo $VETH_NAME

lalala

Answer 2

Use parameter expansion with the %% operator, which drops the longest matching suffix from the expansion.

OUTPUT=abc
PHYSIN="lalala ghi"

VETH_NAME=${PHYSIN%% *}