The Linux Serial HOWTO
by Greg Hankins,
gregh@cc.gatech.edu
v1.5, 06 June 1994
This document describes how to set up serial communications devices on a Linux box.
1.
Introduction
1.1 Other sources of information
1.2 New versions of this document
1.3 Feedback
1.4 Disclaimer
2.
Supported serial hardware
3.
What are the names of the serial ports?
3.1 Major and minor device numbers of serial devices in
/dev
4.
What is
getty_ps
?
4.1 Installing
getty_ps
5.
What is
setserial
?
6.
How do I dial out with my modem?
6.1 Hardware requirements
6.2 Talking to your modem
6.3 Dial out modem configuration
7.
How do I dial in and out with my modem?
7.1 Dial in and out modem configuration
7.2 Example modem setup
7.3 Setting up
uugetty
7.4 Customizing
uugetty
8.
How do I set up a terminal connected to my PC?
8.1 Hardware requirements
8.2 Setting up
getty
9.
Can I use more than 2 serial devices?
9.1 Choosing serial device interrupts
9.2 Setting serial device addresses
10.
Can Linux configure the serial devices automagically?
10.1 Notes for multiport boards
11.
How do I set up my serial ports for higher speeds?
12.
Noteworthy communications programs and utilities
13.
More serial tips
13.1
kermit
and zmodem
13.2 Setting terminal types
13.3 Color
ls
on serial connections
14.
Linux FTP sites
15.
What are locks?
16.
What are UARTs? How do they affect performance?
17.
Troubleshooting
17.1 I keep getting "line
nnn
of inittab invalid"
17.2 When I try to dial out, it says "/dev/cua
n
: Device or resource busy"
17.3 I keep getting "Id S
n
respawning too fast: disabled for 5 minutes"
17.4 I have a modem/terminal connected, but root can't login on it.
17.5 I have my terminal connected to my PC, but after I type in a login name,
17.6 At high speeds, my modem looses data!
17.7 On startup, Linux doesn't report the serial devices the way I have
17.8
rz
and or
sz
don't work when I call my Linux box on my modem.
17.9
getty
or
uugetty
still doesn't work.
18.
Contributions