If I use the -U argument, then the message is gone.
And there are no error (or like error) messages.
Thanks in advance.
>From: "Jeremy C. Reed"
>To: Christian Kurz
>Subject: Re: Ping message
>Date: Wed, 8 Aug 2001 15:59:44 -0700 (PDT)
>On Wed, 8 Aug 2001, Christian Kurz wrote:
> > > > Warning: time of day goes back, taking countermeasures.
> > > I believe your ping command is using features only available in a newer
> > > kernel. Maybe upgrade your kernel (2.4.4?) or see if your ping has a -U
> > > switch to ignore this.
> > What should a feature of a kernel has to do with a message from ping
> > complaining about problems with the time measurement?
> > I don't understand the source of ping completely, but I would say that
> > this message is a hint to a problem with the clock. This message is
>I am pretty sure it is not the return value form gettimeofday() -- it is
>the information returned via ioctl() for a SIOCGSTAM (receive timestamp of
>the last packet passed to the user) or SO_TIMESTAMP request (timestamp of
>I believe -U uses different functionality (old feature) and
>bypasses this problem.
>From looking at postings on the web, it appears to be a kernel bug.
>Some info at http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=37485
> Jeremy C. Reed
>echo '9,J8HD,fDGG8B@?:536FC5=8@I;C5?@H5B0D@5GBIELD54DL>@8L?:5GDEJ8LDG1' |\
>sed ss,s50EBsg | tr 0-M 'p.wBt SgiIlxmLhan:o,erDsduv/cyP'
>To UNSUBSCRIBE, email to email@example.com
>with a subject of "unsubscribe". Trouble? Contact firstname.lastname@example.org