Network Troubleshooting Recipe

• $ ping 127.0.0.1 – If it fails:

  • # ifconfig lo 127.0.0.1 up – still no good?
  • Your local networking, or firewall, is not set up properly.

• $ /sbin/ifconfig

  • If it shows the loopback interface only, the driver for your NIC is not loaded. Look into /etc/modules.conf and the output of # lsmod
  • If you see your interface (e.g. eth0), but no IP assigned, ask for one: # dhclient eth0 – or assign one statically with # ifconfig eth0 10.0.0.57 up
  • You see the interface, it has an IP, but still you can't talk to the network? $ ping <my_IP_addr> - if it fails, your NIC is bad.

Notes: