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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.eng.convex.com!newshost.convex.com!newsgate.duke.edu!interpath!news.interpath.net!bogus From: kpneal@interpath.com (Kevin P. Neal) Newsgroups: comp.sys.sun.admin,alt.sys.sun,comp.unix.bsd.misc,comp.unix.programmer,comp.unix.bsd.bsdi.misc,comp.unix.admin Subject: Re: ping script Date: Wed, 31 Jul 96 05:08:30 GMT Organization: It's a Bedroom--Not A Lab Lines: 28 Message-ID: <4tmpnr$gg4@redstone.interpath.net> References: <Pine.SOL.3.93.960702171209.4062B-100000@gold.acns.fsu.edu> <4sbfat$ll@keyhole.west.spy.net> <4t2put$n1i@news.fsu.edu> <Dv38zE.8v3@tip.nl> <4tilco$bm@anorak.coverform.lan> <4tkjiq$32g@typo.org> NNTP-Posting-Host: raleigh-001.interpath.net X-Newsreader: News Xpress 2.0 Beta #0 Xref: euryale.cc.adfa.oz.au comp.sys.sun.admin:71530 alt.sys.sun:10460 comp.unix.bsd.misc:1279 comp.unix.programmer:40369 comp.unix.bsd.bsdi.misc:4429 comp.unix.admin:45531 In article <4tkjiq$32g@typo.org>, BOFH <web@typo.org> wrote: >Brian Somers <brian@awfulhak.demon.co.uk> wrote: >: Marc Mulhuijzen (marc.mulhuijzen@tip.nl) wrote: >: : Maybe it is already said but ping does NOT garantee that a system is >: : up and running ! I have written a tool which reads/writes messages >: : through sockets, so that one knows that processes are running on a >: : system, while ping only gets replys from the controller. (A system can >: : still be pinged and hang at the same time, that's why I wrote my stuff >: : with help of others as well !) > >: Well, replies from the low-level networking code.... What you really >: need is to include a "hello are you there" ability in your server. > >: Most - if not all - internet protocols have this (connect, read a prompt, >: send quit, read OK). Anyone know of any tcp chat-like programs ? > >For this type of action, I usually use port 13. (date) If the system is >wedged but still pingable, you're not gonna get a date back. If its just >bogged down, you'll get a date but it will take a few seconds. But this could also mean that inetd died. Telnetting to sendmail, or rup'ing the machine sometimes gives info. -- XCOMM Kevin P. Neal, Sophomore, Comp. Sci. \ kpneal@interpath.com XCOMM "Corrected!" -- Old Amiga tips file \ kpneal@eos.ncsu.edu XCOMM Visit the House of Retrocomputing: / Perm. Email: XCOMM http://www4.ncsu.edu/~kpneal/www/ / kevinneal@bix.com