#ifup eth0
Device eth0 does not seem to be present, delaying initialisation
What’s happening here is that when you clone your VM, VirtualBox apply a new MAC Address to your network interfaces but they don’t update the linux configuration files to mirror these changes and so the kernel doesn’t firstly can’t find or start the interface that matches it’s configuration (with the old MAC Address) and it finds a new interface (the new MAC Address) that it has no configuration information for. The result is that only your networking service can only start the loopback networking interface and eth0 is dead.
- Remove the kernel’s networking interface rules file so that it can be regenerated.
- Restart udev and network services
- UPDATE your interface configuration file
- Restart the networking service.
Easy form:
#! /bin/bash rm -rf /etc/udev/rules.d/70-persistent-net.rules start_udev /etc/init.d/network restart DEV=/etc/udev/rules.d/70-persistent-net.rules ETH=`cat $DEV | head -8 | tail -1 | awk '{ print $7; }' | cut -d """ -f 2` MAC=`cat $DEV | head -8 | tail -1 | awk '{ print $4; }' | cut -d """ -f 2` CFG="/etc/sysconfig/network-scripts/ifcfg-$ETH" cat > $CFG <<EOF DEVICE=$ETH HWADDR=$MAC TYPE=Ethernet UUID= ONBOOT=yes NM_CONTROLLED=yes BOOTPROTO=dhcp EOF ifdown $ETH 2> /dev/null ifup $ETH 2> /dev/null ping -c 1 www.google.com > /dev/null if [ $? -eq 1 ]; then echo "Network failed!" exit 1 else echo "Network ready!" fi
