From the course: Linux System Engineer: Authentication with LDAP and Kerberos
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About NTP in Enterprise Linux 7 and VirtualBox
From the course: Linux System Engineer: Authentication with LDAP and Kerberos
About NTP in Enterprise Linux 7 and VirtualBox
- [Narrator] You can set up an Enterprise Linux server as a time server for other hosts. This server will get us time information from an external source that gets its time information from an atomic clock. Let's talk about Network Time Protocol, or NTP. NTP represents the time as a number of seconds from January 1st, 1900, in the form of a 32-bit number. This means that the time will reset in the year 2036, but does not present a problem because NTP works on the differences between timestamps, so even after it rolls over, it's still accurate. The NTP4 standard has support for keeping track of errors by way of numbers and offsets, meaning it can deal with chunks of time larger than 68 years. NTP is more intelligent than previous time protocols in that it also calculates round-trip time and server response time. When synchronizing to a time server, an initial packet is sent from the client with a timestamp. The receiving server then adds a received timestamp and sends the packet back…
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