Hello.
You have two commands:
First: sudo ifconfig wlan0mon up 192.168.1.1 netmask 255.255.255.0
Second: route add -net 192.168.1.0 netmask 255.255.255.0 gw 192.168.1.1
You need to add 'sudo' to second command.
So, you need to executed:
sudo route add -net 192.168.1.0 netmask 255.255.255.0...