this is obsolete doc -- see http://doc.nethence.com/ instead

Configuring the two serial ports on HP/UX 11i (HP-9000 workstations) 

Introduction 

I've got several HP Visualize workstations and I need to access them by console in case of system or network failures. Each box has two serial ports, tty0p0 (the first one) and tty1p0 (the second one). So the first will be listening for a console connection with Getty and the second one will eventually be used to access other boxes. 

Checking and configuring the hardware 

Look for avaiable serial ports, 

ioscan -fnkC tty

ioscan -fnkC tty | grep '/dev' | awk '{print $NF}'

lssf /dev/tty0p0

lssf /dev/tty1p0

Note. Here are other possible commands to troubleshoot this, 

#ioscan -fnd asio0

#ioscan -fnd mux4

Configure your local serial ports, 

cd /etc/uucp/

mv -i Devices Devices.dist

vi Devices

like, 

Direct tty0p0 - 9600 direct

Direct tty1p0 - 9600 direct

fix and check the file permissions, 

chown root:bin Devices

chmod 644 Devices

ls -l Devices*

Using the terminal emulator 

Simply use 'cu' terminal emulator against a serial port to connect to another box, 

cu -s9600 -l/dev/tty1p0

Note. to disconnect, 

~.

Configuring the target box 

Check for running getty processes, 

ps -ef | grep tty

normaly the console spits on '/dev/tty0p0' by default, but if it doesn't, force a tty on that (first) serial port, 

cd /etc/

cp -i inittab inittab.dist

vi inittab

verify or add that line, 

ttp0:234:respawn:/usr/sbin/getty -h tty0p0 9600

note. You could also enable ttp1 if you want, but as I said in the introduction I am using the second port to connect to other boxes. 

fix and check the file permissions, 

ls -l inittab*

(root:sys 644 by default is just fine)