#!/bin/sh pathfind() { OLDIFS="$IFS" IFS=: for p in $PATH; do if [ -x "$p/$*" ]; then IFS="$OLDIFS" return 0 fi done IFS="$OLDIFS" return 1 } if ! pathfind fwflash; then echo You need to install the libnxt package to flash firmware to NXT bricks. >&2 exit 1 fi fwflash /usr/share/nxt-firmware/nxt_firmware.bin