Flashing a Tbeam for Relay mode only - help

Thanks Kevin, but I didn’t know how to do that. So I found this thread Howto easy create a relay/router node? - #6 by xhabit
I created a script called relay.sh in a text document
Copied in the following and modified the setowner and using GPS coordinates on Google Maps | Latitude Longitude Search, website found the longitude, latitude and altitude.

#/bin/sh
clear
echo “Set all Router Parameter”
meshtastic --setowner MeshRelay
meshtastic --settime
meshtastic --set is_low_power false
meshtastic --setchan tx_power 100
meshtastic --set is_router true
meshtastic --setlat 53.9 --setlon -6.8 --setalt 91
meshtastic --info

I ran the command sudo chmod -R 777 relay.sh to enable the script to be excuted as a progra m.
Then at the prompt entered, ./relay.sh
and this was the output

“Set all Router Parameter”
./relay.sh: line 4: meshtastic: command not found
./relay.sh: line 5: meshtastic: command not found
./relay.sh: line 6: meshtastic: command not found
./relay.sh: line 7: meshtastic: command not found
./relay.sh: line 8: meshtastic: command not found
./relay.sh: line 9: meshtastic: command not found
./relay.sh: line 10: meshtastic: command not found

Have I done something wrong?