crond

[Giuseppe Greco]

On Tue, 2005-01-04 at 20:09 -0600, Jeff Vian wrote:
> On Tue, 2005-01-04 at 20:04 -0500, Erik Hemdal wrote:
> > >
> > > I've written the following script (named checkconn)
> > > to be executed every 5 minutes by crond:
> > >
> > >
> > 
> > . . .
> > 
> > >     `/sbin/adsl-stop`
> > >     `/sbin/adsl-start`
> > 
> > . . .
> > 
> > > 0,10,20,30,40,50 * * * * /root/cron/checkconn
> > > 5,15,25,35,45,55 * * * * /root/cron/checkconn
> > >
> > >
> > > Well, if I execute checkconn from the command line,
> > > it works as expected, while when checkconn is invoked
> > > by crond, it doesn't work...
> > >
> > 
> > 
> > > Any idea?
> > > j3d.
> > >
> > 
> > Here are a few thoughts.  Anything in /sbin is likely to need root privilege
> > to run.
> > So make sure that you use root's crontab, or place the entries in
> > /etc/crontab and specify
> > that they run as user root.  Also, since cron uses a limited path, make
> > certain that
> > /root/cron is in the path (add a PATH= line to the crontab entry).  Try man
> > 8 crontab (IIRC) for information
> > on the crontab file format as opposed to the crontab command.
> > 
> 
> 1.  For Erik:
>     His command uses the full path.  Thus the path comment above is
> superfluous.
> 
> 2.  for j3d.
>     The script being called by cron should contain a shebang line as the
> first line.  Does it?
> it should look like "#! /bin/sh".  You can look at any of the scripts
> in /etc/init.d to see what should be there. 
> 
> 3.  For j3d:
>     What is the purpose of stop/start the adsl connection every 5
> minutes?  As I understand it you are simply verifying the connection is
> intact.  It would make more sense to do a simple ping to some host on
> the internet, and if that fails then do the stop/start.  Otherwise the
> connection is good and you quit.
>     A drawback to your approach is that the IP address may (and often
> does) change when the adsl connection is re-established.  If you are
> using it the IP change may kick you off, and with a long download that
> can be a problem.

Often the pppoe connection stops working even if pppd is still running,
and then I'm not able to access the Internet anymore. When that happens,
the only thing I can do is to restart the ppp0 interface...

I'm trying to figure out the source of the problem, but till now no
way...

j3d.

> 
> 
> 
-- 
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Giuseppe Greco

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