Could you explain me what the word 'outlyer' means in all NTP related
documents? Should I worry about remote servers marked with space in
output of "ntpq -p" or not?

It's where one system is grossly different to all the rest. Suppose that you had 10 server. Your offsets with 9 servers are in the range -0.1s to +0.1s, but one server shows an offset of 0.9s. It would be the "outlier" -

Look this:

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*host1           .GPS.            1 u  202  256  377    0.553   -1.249   0.343
+host2           .GPS.            1 u  182  256  377    3.904   -0.879   0.073
-host3           xxx.xxx.xxx.xxx  2 u    9  256  377   33.926   -0.450   0.152
+host4           xxx.xxx.xxx.xxx  2 u    8  256  377   39.030   -1.050   0.252
-host5           xxx.xxx.xxx.xxx  2 u  202  256  377    0.564   -0.947   0.152

Host3 and host5 are marked as outliers.
Why?
Host4 has worse paremeters.

Gabor
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