/dev/modem symlink gets wiped out on boot

[stan]

On Sat, Nov 12, 2005 at 04:36:06PM -0400, Derek Broughton wrote:
> D.Personne wrote:
> 
> > Le samedi 12 novembre 2005 ? 11:48 -0500, stan a ?crit :
> >> I've just mamnaged to get my winmodem working using the ltmodem kernel
> >> modules.
> >> 
> >> Only one remaining problem. The actual nevice node is /dev/ttyLM0, and
> >> when I create a symbolic link for /dev/modem to it, this is not there
> >> after I reboot the machine.
> >> 
> >> Why does this get removed, and how can I fix this?
> > 
> > Hi,
> > Try this:
> > 
> > write a script (first line =>   #!/bin/sh
> > then next line =>  symbolic linking)
> > and put it in the /etc/init.d/ using update-rc.d
> > 
> 
> That's the hard way to do the job.  
> 
> First make sure udev is installed.  Then add something like 
> KERNEL=="ttyLM0", SYMLINK+="modem"
> 
> in /etc/udev/rules.d/15local.rules
> 
> (There's no real requirement for the name of that file, except that it ends
> in .rules).
> 
> The answer to OP's question of "why" it gets removed is that all /dev/ names
> are temporary, and are recreated at boot time (actually at the time their
> modules are inserted into the kernel) by udev, so the correct place to set
> symlinks is always in udev.

OK, now I understand.

New to me, but it makes sense, thnaks for educationg me.

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