6.3. agetty
agetty is an "alternative
getty". It takes all of its parameters on the command line,
with no use of /etc/gettydefs or any other
configuration file. agetty is
documented in the manual page
agetty(8).
Figure 6-6 shows how to invoke
agetty for use with a serial
console.
ttyS0 refers to the serial device
/dev/ttyS0.
9600 is the bits per second of the serial
link. agetty will support multiple values, using the modem's
CONNECT message or the RS-232
Break signal to select between them. Only use one value, as serial
consoles only have only one data rate.
vt102 sets the TERM
environment variable to indicate that a
VT100 terminal is
connecting.
-h activates CTS/RTS handshaking.
-t 60 allows 60 seconds for someone to
attempt to log in before the modem is hung up. You should test
this feature to ensure that init is not
restarting agetty every 60 seconds when
the link is idle. Look for a continually changing process
identifier for agetty.
agetty uses escape sequences in
/etc/issue to insert information. For
example, \n.\o \l will appear as
remote.example.edu.au ttyS0.
When you log out agetty does not
appear to lower the Data Terminal Ready signal to force the modme
to hang up. If having people automatically disconnected at the end
of their login session matters to you then you might consider
mgetty instead.
Take our 
