On 12/11/2018 04:04 PM, Beartooth wrote:
Hoo, boy! I haven't so much as heard of traceroute in ten or
fifteen years, and never did grep its uses. I can look it up, of course,
but it might be worth your while to just tell me a command (and to use it
as root if that should be desirable).
For all practical purposes, traceroute pings each hop along the way to
the destination three times. (That's not really how it does it, but
don't worry about it.) If you can't ping someplace, traceroute will
show you where the problem is, because it will stop getting responses.
Also, if you've got a slow connection, you can tell where the issue is
because the return times will suddenly jump. The only time you need
root for it is for traceroute -I, because that uses ICMP ECHO for
probes, but can get response where nothing else does. Back when I was
doing tech support for an ISP, we used it all the time on calls to find
out why connections were slow, and usually to show the caller that it
was outside our network.
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