The
Sample startup scripts can be found in context for dyanmically dialed Irix PPP, and
dynamically dialed SLIP. Here is a
sample startup script to setup Proxy ARP on a server at boot time:
chkconfig options
The global configuration of an SGI machine (an IRIX is controlled by the chkconfig
state. The current state of your host is determined by running the
`chkconfig` command without any arguments. This is the output
from an IRIS running Irix-5.2 and using SLIP or PPP as it's only network
access (a so-called stand-alone host):
Flag State
==== =====
autoconfig_ipaddress off
automount off
desktop on
directoryserver off
fontserver off
gated off
glb off
llb off
lockd on
mediad on
mrouted off
named off
netls on
network off
nfs on
noiconlogin off
objectserver on
rarpd off
rfindd on
routed off
rtnetd off
rwhod off
sar off
snmpd off
soundscheme off
timed off
timeslave off
verbose on
visuallogin on
vswap on
windowsystem on
xdm on
yp off
ypmaster off
ypserv off
Many of the options like yp are not even checked if
network is off. Note that the network
option has to do only with whether the physical networking interfaces (like
ethernet) are configured, not with whether TCP/IP is enabled (it can't be
turned off).
chkconfig options can be changed by running the command
(as root):
chkconfig option on|off
The chkconfig options are checked when the scripts in
/etc/init.d/ are run, normally at system boot time. Unless
you are very familiar with the boot process, it is best to just reboot
after changing any of the options, to have them take effect.
Boot-time startup scripts
Sometimes you need to add something that needs to happen at system boot.
This could be adding routes, or starting a dynamic dialed PPP at boot time,
or setting up proxy ARP on
a server. This is accomplished by adding a script to the
/etc/init.d/ directory, where the startup (aka RC)
scripts are placed. You would also place a symbolic link in the
/etc/rc2.d/ directory for your script to be run at the correct
sequence during startup. Because they are in seperate files, your custom
startup scripts will not be stepped on by an upgrade to the OS.
#!/bin/sh
#
# starting up local networking stuff
#
IS_ON=/etc/chkconfig
CONF=/etc/config
if $IS_ON verbose ; then
ECHO=echo
VERBOSE=-v
else # For a quiet startup and shutdown
ECHO=:
VERBOSE=
fi
case "$1" in
'start')
# setup proxy ARP for the dialin hosts
# if this host has more than one interface,
# you will need to hard-code the ethernet MAC address
# instead of letting it be determined at run time.
# note that 4DDN (among others) may change the MAC address from default!
# and some AppleTalk packages change the output of `netstat -ian`!
arp -s client1 `netstat -ian | grep :` pub
arp -s client2 `netstat -ian | grep :` pub
arp -s client3 `netstat -ian | grep :` pub
;;
'stop')
# be nice and delete the ARP entries
arp -d client1
arp -d client2
arp -d client3
;;
*)
echo "usage: $0 {start|stop}"
;;
esac
exit 0
#
Assume the preceding file was named /etc/init.d/network.local,
and you want it to start just after networking, then you would use the
following commands to create the startup and shutdown links:
ln -s ../init.d/network.local /etc/rc2.d/S31netlocal
ln -s ../init.d/network.local /etc/rc0.d/K39netlocal
Where To Go From Here
Either use the Back key on your browser, or check out the
top-level source page for
Dialup (Remote) Access.
Scott
Henry <scotth@sgi.com>
Last modified: Thu Mar 21 21:48:36 1996