GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 2.1AS(Slurm) |
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clockdiff(8) |
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clockdiff − Measures clock difference between us and <destination> with 1msec resolution. Without -o option it uses icmp timestamps, with -o it uses icmp echo with timestamp IP option.
clockdiff [-o|-o1] <destination>
* some nodes (f.e. Solaris<2.4) do not support icmp
timestamps. clockdiff -o still works.
* some nodes (Cisco) use non-standard timestamps,
which makes clockdiff useless.
* some nodes use wrong timestamps (Solaris>2.4), if
run xntpd. Seems, it uses different clock source, which is synchronized to time-of-day clock periodically.
* -o1 uses three-node tstamp. What option (-o or -o1)
works better depends on target host.
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clockdiff(8) | |