Linux comand: visudo

visudo

To give a user sudo permits

sudo visudo

add line:
pi ALL=(ALL) NOPASSWD: ALL
or
root ALL=(ALL:ALL) ALL

To allow some unprivileged user to run some commands with sudo:

joe ALL=(ALL) NOPASSWD: /full/path/to/command

or with some arguments:

joe ALL=(ALL) NOPASSWD: /full/path/to/command ARG1 ARG2

fixroute script

match=$(route -n | awk '{print $1 " " $2}' | grep '0.0.0.0 172.27.0.1')

if [ ! -z "$match" ]; then
    sudo route del -net 0.0.0.0 netmask 0.0.0.0 gw 172.27.0.1 enp0s25 >> /tmp/fixroute.log
    echo "\033[1;32m Removed route from routing table \033[0;00m"
    sudo route -n
else
    echo "\033[1;31m Route not found: -net 0.0.0.0 netmask 0.0.0.0 gw 172.27.0.1 enp0s25 \033[0;00m"
    sudo route -n
fi