A problem with a simbolic link

[Nicosia Gaetano]

Thank You

Gaetano

Il 02/07/2010 19:38, Joshua Gimer ha scritto:
> On Fri, Jul 2, 2010 at 10:03 AM, Nicosia Gaetano<
> nicosia.gaetano at moonsoft.it>  wrote:
>
>    
>> Hi to All,
>>
>> In RHEL5, I use ttyS0 for modem and I have create this simbolic link:
>>
>> ln -s /dev/ttyS0 /dev/modem
>>
>> The link is correctly created eand work fine; but if I restart the server
>> the link is deleted.
>>
>> How can to create this link permanently ?
>>
>> Thank You and best regards
>> Gaetano
>>   <https://www.redhat.com/mailman/listinfo/redhat-list>
>>
>>      
> This is due to udev recreating everything in /dev at system boot. You can
> create a udev rule to create the symlink at boot.
>
> Edit your /etc/udev/rules.d/50-udev.rules and somewhere after the line that
> has 'KERNEL=="tty[pqrstuvwxyzabcdef][0123456789abcdef]"' add a line that
> contains the following:
>
> KERNEL=="ttyS0", SYMLINK+="modem"
>
> This should cause the symlink to be created at boot. Be careful to maintain
> permissions and structure on all udev rules files as you can cause some real
> headaches for yourself if they become corrupted.
>
>