Installing PPP on an Ultrix system requires rebuilding the kernel andrebooting, in addition to making and installing the pppd and chatprograms.  These instructions apply to RISC (MIPS) systems.  Thissoftware should work under Ultrix 4.2, 4.3 or 4.4 (this release hasnot been tested yet).Kernel installation procedure.******************************If you have not previously had an earlier version of this packageinstalled in the kernel, follow these steps:1. Become root.2. Apply the patches in the file ultrix/patches using the command:	patch -p -N <ultrix/patchesThis will edit the following files, saving the original versions in afile with `.orig' appended to the name:	/usr/sys/h/ioctl.h	/usr/sys/net/net/if.h	/usr/sys/net/net/netisr.h	/usr/sys/net/net/conf_net.c	/usr/sys/data/pseudo_data.c	/usr/sys/data/tty_conf_data.c	/usr/sys/conf/mips/files.mipsAlternatively, edit these files according to the differences shown inultrix/patches.3. Copy the following files to /usr/sys/io/netif:	net/ppp-comp.h	net/ppp_defs.h	ultrix/bsd-comp.c	ultrix/ppp-deflate.c	ultrix/if_ppp.c	ultrix/if_ppp.h	ultrix/if_pppvar.h	ultrix/ppp_tty.c	ultrix/slcompress.c	ultrix/slcompress.h	common/zlib.c	common/zlib.h4. Add a line like this to the configuration file for your kernel:	pseudo-device ppp	2The `2' indicates the number of interfaces desired.  The configurationfile should be in /usr/sys/conf/mips.5. Rebuild your kernel.  The simplest way to do this is with the`doconfig' command, like this:	/etc/doconfig -c kernel-namewhere `kernel-name' should be replaced by the name of your kernelconfiguration file.  Alternatively, run config, cd to the compilationdirectory, and run make.6. Copy the new /vmunix to /.  It would be a good idea to keep a copyof your old /vmunix in / under a different name.7. Reboot the system.********If you have ppp-2.2 already installed in your kernel, most files willalready have been modified as required.  You will need to add someentries to /usr/sys/conf/mips/files.mips.  You can do this with acommand like this (as root):	patch -p -N <ultrix/upgradeAlternatively, edit /usr/sys/conf/mips/files.mips according to thedifferences shown in ultrix/upgrade.Then, proceed with steps 3, 5, 6, 7 above (step 4 should have beendone already).Installing pppd and chat.*************************1. cd to the ppp-2.2 directory and do:	./configure	make2. Become root, and do:	make installCredits.********The original port to Ultrix was done by:	Per Sundstrom 	DEC, Sweden	email: sundstrom@stkhlm.enet.dec.comand	Robert Olsson 	Swedish University of Agricultural Sciences	and also RO Komm. & Konsult	email: robert@robur.slu.seIt was updated to ppp-2.3 by	Paul Mackerras	Dept. of Computer Science	Australian National University	paulus@cs.anu.edu.au