-u, --usage Show brief usage message.\n\
\n\
-g, --growth=FACTOR Growth factor for retransmit interval.\n\
-m, --method=METHOD Use METHOD to probe for MTU.\n\
-r, --retransmit=SECS Retransmit if no reply after SEC.\n\
-t, --timeout=SECS Give up expecting a reply after SECS.\n\
-u, --usage Show brief usage message.\n\
\n\
-g, --growth=FACTOR Growth factor for retransmit interval.\n\
-m, --method=METHOD Use METHOD to probe for MTU.\n\
-r, --retransmit=SECS Retransmit if no reply after SEC.\n\
-t, --timeout=SECS Give up expecting a reply after SECS.\n\