linux shell echo GUESS_IPV4_IF=$(ip route show | grep default | head -1 | sed -r 's/.+dev ([^ ]+echoGUESS_IPV4_IF=$(ip route show | grep default | head -1 | sed -r 's/.+dev ([^ ]+) .+/\1/')GUESS_PRIMARY_IPV4=$(ip addr show primary | grep "inet " | aw

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