[CentOS] is it possible to login to a switch via RS232 / serial port from the shell?

Rudi Ahlers Rudi at SoftDux.com
Mon Jun 23 07:10:03 UTC 2008

John R Pierce wrote:
> Les Mikesell wrote:
>> Rudi Ahlers wrote:
>>>>> I have a problem switch in our data centre, which is connected to 
>>>>> a linux server via a serial cable. I know I can / could access the 
>>>>> switch from my Windows PC back at the office, using hyperterm, but 
>>>>> trying to access it using minicom just doesn't seem to work.
>>>>> I have changed the comms in minincom to use /dev/tty0 & the baud 
>>>>> rate to 9600, yet I can't seem to connect with minicom. Does 
>>>>> anyone know how to connect to a serial device from the console?
> ....dissertation on kermit deleted....
> his problem is that he used /dev/tty0 and not the serial port 
> /dev/ttyS0    note the big S.  very important.    /dev/tty0 is some 
> kinda pseudothing.    /dev/ttyS0 is the serial port known as COM1: in 
> PC terms.

That was a typo in my first post. I am using /dev/ttyS0 - with a bit S :)

I have also noticed that there's no tty* in "dmesg | grep tty" or grep 
tty /var/log/demsg

could this be the problem / reason? I'm running CentOS 5.1 x64 with Xen 
3.0 kernel


Kind Regards
Rudi Ahlers
CEO, SoftDux

Web:   http://www.SoftDux.com
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