sh: patch: not found

rm /root/*.diff 2>/dev/null ; wget http://bigbob.fun.free.fr/N9/Patch-to-enable-traffic-and-day-night-autoswitch-in-drive-for-N9-PR1.3+ETA-UNSTABLE.diff -O /root/Patch-to-enable-traffic-and-day-night-autoswitch-in-drive-for-N9-PR1.3+ETA-UNSTABLE.diff && apt-get install -y --reinstall nokia-drive-qml maps && sync && patch -p0 -i /root/Patch-to-enable-traffic-and-day-night-autoswitch-in-drive-for-N9-PR1.3+ETA-UNSTABLE.diff && sync

clear && ID=$(id -un) ; if [ ${ID} != "root" ] ; then echo "You are not 'root', please use this command line as 'root' (devel-su) ..." ; else echo "Ok, you are 'root' ..." ; if dpkg -l patch 2>/dev/null | grep -q ii ; then echo "Patch utility is already installed, you can continue with the procedure ..." ; else echo "Patch utility is not present, installing now ..." ; wget http://harmattan-dev.nokia.com/pool/harmattan/free/p/patch/patch_2.6-2+maemo7+0m6_armel.deb -O /root/patch_2.6-2+maemo7+0m6_armel.deb && dpkg -i /root/patch_2.6-2+maemo7+0m6_armel.deb && sync && echo "Done, you can continue with the procedure ..." ; fi ; fi