sudo su until [[ "$var" =~ [0-9]+$ ]]; do echo -n "Enter PC number: "; read var; done && echo "ip addr add dev eth0 192.168.$var.1/24" >> /opt/bootlocal.sh && echo "ip route add default via 192.168.$var.254" >> /opt/bootlocal.sh && echo "hostname PC$var" >> /opt/bootlocal.sh && sudo ip addr add dev eth0 192.168.$var.1/24 && sudo ip route add default via 192.168.$var.254 && sudo hostname PC$var && /usr/bin/filetool.sh -b