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The Network Time Protocol (NTP) is used to synchronize the clocks of all computers in the CPM lab.The Ubuntu ntp
package should already be installed from the previous step.
Edit the NTP configuration sudo nano /etc/ntp.conf
and insert your NTP server. In our case, this is:
pool ntp1.rwth-aachen.de iburst
pool ntp2.rwth-aachen.de iburst
Restart NTP using sudo service ntp restart
.
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Under the st (stratum) column sould be at least one "1". This indicates a successful synchronization.
janis@cpmcpm@cpm-MS-7A94:~$ ntpq -p
remote refid st t when poll reach delay offset jitter
==============================================================================
ntp1.rwth-aache .POOL. 16 p - 64 0 0.000 0.000 0.000
ntp2.rwth-aache .POOL. 16 p - 64 0 0.000 0.000 0.000
0.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
1.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
2.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
3.ubuntu.pool.n .POOL. 16 p - 64 0 0.000 0.000 0.000
ntp.ubuntu.com .POOL. 16 p - 64 0 0.000 0.000 0.000
*ts-1.rz.rwth-aa .GPS. 1 u 281 512 377 0.486 -1.204 0.122
+ntp2.rwth-aache .GPS. 1 u 187 512 377 0.563 -1.082 0.139
The
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website
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is
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also
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useful
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for
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checking
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the
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clock
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synchronization.
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