In the last years, I often had the problem that the system time of a linux server was not correct.
There’s a simple way the sync your internal clock with some of these ultra-correct clocks over the internet.
Just use ntpdate.
#ntpdate SERVERADDRESS
Here is a list with public timservers.
djb has a nice tool called “clockspeed” that will slow your clock down or speed it up if needed. Just edit conf-cc and add “–include error.h” so it compiles with modern glibc packages and do a “make; make setup check”. Then perform the following steps:
1. start the daemon: “# nohup /usr/local/clockspeed/bin/clockspeed &”
2. give it the current time: “# /usr/local/clockspeed/bin/sntpclock ntp.srv.ip.123 | /usr/local/clockspeed/bin/clockadd”
3. now, after a few hours give it an updated reading so it can adjust to your clock:
“# at now + 8 hours
at> /usr/local/clockspeed/bin/sntpclock ntp.srv.ip.123 > /usr/local/clockspeed/adjust
at> ^D”
4. repeat step 3 for “+ 16 hours” and “+ 24 hours” to get a more accurate reading
5. put a small script into /etc/init.d that starts clockspeed at boottime, something like:
#!/bin/sh
/usr/local/clockspeed/bin/clockspeed &
6. … [need to figure this out]
7. profit!
anybody here know of a good site to find more info on linux ntp server? I\’ve got this site bookmarked and im gonna keep checking it out, but i still would like to find a site that covers linux ntp server a little more thoroughly..thanks