topic Re: accees a Linux from com port in Operating System - Linux

accees a Linux from com port

laaalitha — Wed, 10 Jan 2007 04:50:53 GMT

i want to access a linux machine from the COM port by the hyperterminal from a another PC.
How to configure the Linux machine, for this ?
Need all the steps..and send me a URL link ?

Re: accees a Linux from com port

Alexander Chuzhoy — Wed, 10 Jan 2007 05:25:37 GMT

the utility is minicom.
You have to be root to be able to work with or to do some workaround (like chmod u+s, etc).
at first execute `minicom -s`
This will bring you the setup. From there- it's simply logical.

To bring the menu on the screen- use:
CTRL+A,X

Re: accees a Linux from com port

laaalitha — Wed, 10 Jan 2007 05:30:53 GMT

i wannna access to a linux machine from wondows machine via the com ports of the machunes using the hyperterminal of the windows machine, how to configure the linux machine for this, by default cant access?

Re: accees a Linux from com port

Alexander Chuzhoy — Wed, 10 Jan 2007 05:36:40 GMT

1.make sure that you have a cross serial cable.
2. When you configure your minicom (In serial port setup) by default it uses /dev/ttyS1. Change it to /dev/ttyS0

Also make sure that the serial port is enabled in BIOS.

Re: accees a Linux from com port

Stuart Browne — Wed, 10 Jan 2007 05:52:24 GMT

Umm... '/etc/inittab'.

If you want to log in via the COM port on the Linux server from your Windows machine, you need to configure the serial port to have a 'getty' running.

You want a line similar to:

S0:2345:respawn:/sbin/mgetty -s 9600 /dev/ttyS0

See the man page for 'mgetty' for more details.

You can safely muck around with the speed and the gettydefs value if you need to.

Also note, you may need to use 'setserial' if you are using a high speed serial port.

From there, with a connected serial cable, you should be able to get a console on your Windows machine using Hyperterminal (or whatever).

If you want to see boot messages from the server, then you need to configure your boot-loader (grub) to have the 'console=ttyS0,9600' (or similar).

http://www.vanemery.com/Linux/Serial/serial-console.html
http://www.ibiblio.org/pub/Linux/docs/HOWTO/other-formats/html_single/Serial-HOWTO.html

A few pretty decent references for all of this.