The Network Time Protocol (NTP) keeps a computer's clock synchronized with a set of time servers distributed over a network, each with varying accuracy and reliability. Texas A&M IT maintains the following four public NTP time servers.
For systems which only allow one server to be specified, the name `time.tamu.edu' should be used. This name should only be used in conjunction with DNS.
For Unix clients, there is a sample ntp.conf file located here.