Setup networking for a CentOS VM (on Hyper-V)

setup_networking.sh

# Start here: https://gist.github.com/wcarhart/48ce5d7e14a8172352db62af9705c183

# Edit the default network adapter settings
cd /etc/sysconfig/network-scripts/ifcfg-eth0
# IPADDR can be anything in our range
sed -i.bak -e 's/IPADDR = ".*"/IPADDR = "192.168.1.2"/'
# GATEWAY needs to match the gateway defined in Hyper-V
sed -i.bak -e 's/GATEWAY= ".*"/GATEWAY = "192.168.1.1"/'

# Configure DNS
# Use either Cloudflare DNS
echo "nameserver 1.1.1.1" > /etc/resolv.conf
# or, Google DNS
echo "nameserver 8.8.8.8" > /etc/resolv.conf

# if you have extra internal repos, turn them off before using yum
sed -i.bak -e 's/enabled=1/enabled=0/' /etc/yum.repos.d/internal.repo

# Test internet connectivity
ping 8.8.8.8
# Test DNS
ping google.com