Linux in order to solve the problem of network failure, the most basic question we need to understand the possible occurrence of network conditions, it should check whether the following seven steps where errors:
Step One: Confirm the network card work: re-driven network card
Step two: local area network hardware on-line confirmation
Step Three: Make sure there is no problem routing table information
Step Four: Make sure the DNS IP settings
Step Five: NAT function (or IP sharing device) is normal
Step Six: ADSL modem or router problem
Step Seven: Turn off the host service is the problem with the service authority
