[email protected]
arpwatch
This document does not resemble a common HOWTO, meaning referencing to general principles, but it is rather an on-hand approach to a by nature complex matter. It borrows the structure of the current Root over NFS , but differs from it in the following points:
This HOWTO expects that you have a general knowledge of what you are up to, so first read the Diskless Nodes HOW-TO.
It is a common case a University computer lab to have a lot PC's running Windows 98 or/and NT and a powerful UNIX server to satisfy the need of an alternative operating environment. This UNIX server is most of times idle or meerly accessed by telnet and running stupid tasks. On the other hand, students, especially those attending a computer science department, feel like taking full advantage of it, just for fun or for "educational purposes" (breaking in, hacking it...). The restrictive environment of telnet does not allow us to enjoy the use of a power server.There are 2 alternatives to that:
The network at the computer lab consists of the following.
The task I had to accomplish was the following: Provide a complete working solution without new expenses and without modifying anything but the necessary on the server.
Being the responsible for the project, I had to choose between a variety of solutions about it. I choose the following, for the reasons illustrated:
To be able to boot a Linux system, you have to provide it with the following:
/sbin directory. There exists the init programm,
which is responsible for starting other programms and start up scripts during
the boot process. Also, the /sbin directory contains the startup scripts in the case of SuSE,
some useful programms like the portmap programm and many other programms that are needed before you mount the /usr directory./lib directory. It contains the libc libraries that are absolutely necessary if your init is dynamically linked./bin directory. It contains file commands and shells for running startup scripts. /etc directory. It contains configuration files for most programms and the rc.d directories that is the default for startup scripts./var directory. It is a spool area for programms that want to write somewhere. It is divided into many subdirectories with alternate usability./dev directory. It contains character and block special devices that allow programms to communicate with the computers devices via the kernel./usr and /opt directories.
So, it is possible to create a directory for every diskless client containing the above listed directories
and mount points for directories like /usr that will be exported by the server.
The boot process, as assumed by this document, is the following:
init programm is started. Before switching to a run level, it calls a script described in the /etc/inittab file.
This script is responsible for building the library cache, initialise and mount a swap file,
load some system specific kernel modules and set the hostname./etc/rc.d/rcX directory where 'X' is the name of the runlevel.
These scripts are responsible for starting the portmapper and mounting the NFS exported /usr, /home and /opt directories.
The first, and less tricky, thing to do is to setup the server. The server must be prepared to run these services:
/usr, /lib/modules, /opt (at least at SuSE) and /home (unless you have a dedicated file server).
/usr/local/linux-
|-/base-
| |-/bin
| |-/sbin
| |-/etc
|
|-/workstations-
| |
| |-195.251.160.100
| | |-/bin
| | |-/sbin
| | |-/etc
| |
| |-195.251.160.101
| |-195.251.160.102
| |-base(symbolic link to ../base)
The /base directory contains the whole file system you want to export to your clients.
The per IP directories contain files that are needed before mounting the /usr or /lib/modules directories,
like the /etc folder. This is a confortable directory structure for 2 purposes:
i) You can easily create a basic system at the base directory and copy the per workstation files at the workstation directories easily,
with an entry level bash script ii) You can easily add or delete or update workstations by modifying the directories under /workstations.
A script for copying the appropriate files (which will be discused later) can be found in Appendix A.
An NFS server can be set up in two ways:
/etc/exports file at BSD-compliant Unices like Linux of FreeBSD./etc/dfs/dfstab at SysV Unices like Solaris./etc/exports file controls the directories to be exported and the export options per workstation.
It has a structure like the following (Linux):
/path/to/dir1 ws1(options) ws2(options).... /path/to/dir2 ws3(options) ws1(options)....
Options include ro or rw, root_squash, wsize, tcp, version.
Have a look at the nfs or the exports man page and the NFS Howto for a more detailed description of what these options mean.
/etc/dfs/dfstab:A typical dfstab file on Solaris should look like the following:
share -F nfs -o rw=193.250.160@,ro=193.250.161@ /export/home share -F nfs -o ro=193.250.160@,root=193.250.161.132 /export/engineering
Of course, these options are discused in detail at the dfstab man page.
The directories we want to export are /usr/local/linux/base/usr, /usr/local/linux/base/opt,
/usr/local/linux/base/lib/modules and /home, assuming that you 've followed the suggested structure.
Optimising NFS
Of course, this is none of our business but here are some general principles:
Although there are many DHCP or BOOTP servers 'out there', some of which are proprietary,
the best option is to use the reference IETF DHCP server.
It is the least vulnerable and the most extensible DHCP available.
The main server configuration is done through the /etc/dhcpd.conf file.
This file is divided into two sections, the general server configuration and the host specific configuration.
A typical dhcpd.conf file looks like this, in case that the DHCP/BOOTP server is used in BOOTP mode:
subnet 193.250.160.0 netmask 255.255.255.0 {
range 193.250.160.10 193.250.160.12;
}
host george{
hardware ethernet 00:60:08:2C:22:20;
fixed-address 193.250.160.10;
}
host earth{
hardware ethernet 00:A0:24:A5:FD:E0;
fixed-address 193.250.160.12;
}
This structure is fairly easy to be understood by everyone. For every diskless client we have to
supply the programm with a 'host' declaration providing a pair of hardware and IP adresses.
The host name provided in the 'host' statement can be everything, but there is a conversion to
use the real host name of the client having the specific IP. The range statement in the subnet declaration is not
necessary to be the range that you want your clients to have. In fact, if these clients are normal workstations
with an operating system that during its boot uses DHCP to obtain an IP address it is not recommended to have
the same IP for their operation as diskless clients. If you have specific needs, have a look at dhcpd.conf man page.
Another difficulty is how to obtain the IP - MAC address pairs for a large network. The solution is a nice little programm
called arpwatch. This programm runs at the background and keeps track of the IP - MAC address pairs of the computers
that your computer has contacted in a file that you have specified. The only thing you have to do is to ping the computers
you want. At Appendix B there is a script that starts arpwatch, pings a range of subsequent IP's and creates the dhcpd.conf file.
If you want to do it manually, start arpwatch when your network is at its peak of usage and wait for some time.
On a shared medium network (Ethernet, Tokenring) arpwatch will track down all different IP 's and hardware addresses.
To prepare the base system just install your favorite distribution to a mountable partition on a hard disk with a
Unix like operating system
already installed. Install all the programms you want to be available to your users.
Then you have to transfer the whole partition preserving the links and the character or block devices.
This is best done using the tar programm. Boot the previously installed system and execute the following command,
assuming that you have mounted the new partition at /mnt:
tar cpvf system.tar /mnt/.
This command will create a tar archive at the current directory with the whole system to be served to the diskless clients.
Then just copy the tar archive to the server using a CDROM or through the network and extract it at the base directory.
The command to do this is:
tar xvf system.tar /usr/local/linux/base
In order to setup the clients, we have to work on the base system. First, we will make some modifications to the startup scripts by hand and second we will boot a workstation with the base system to make sure it works and to polish some details. Note that this part is very distribution specific and perhaps some of those described here are not applicable to your case. I can only guarantee that this works for SuSE 7.0. Please, feel free to send me distribution specific copies of this page!
After init is started, it executes a script described in /etc/inittab. This script has a very spesific job to do:
Bring the system in a state that other programms can be started. In most distributions I can think of this script does the following:
/proc, /dev/pts and swap filesystems./usr directory to be mounted.
If you are trying to netboot a host you must do the following modifications to this script:
mount -o remount,rw / because the client has to have rw access to the root directory when it boots.ln -s /etc/rc.d/portmap /etc/rc.d/boot/S01portmap if you are using SuSE.ln -s /etc/rc.d/nfs /etc/rc.d/boot/S02nfs for SuSE.
This is tricky business! Swapping over NFS is not allowed by the kernel and not functioning either. You cannot use
swapon on files that are on an NFS mounted filesystem. We have to do some tricks to enable it:
dd if=/dev/zero of=/var/swap bs=1k count=Xk
where X stands for the number of MB your swap should be. It is also a necessity to put the swap file under /var
as long as it is mounted at boot.mkswapfs command.losetup /dev/loop0 /var/swap.mount /dev/loop0 swap.
/etc/fstabThe /etc/fstabfile contains entries for automounting file systems at boot. In our case, we have
to place the following lines at the end of it:
server_IP:/usr/local/linux/base/usr /usr nfs nfsvers=3,wsize=2048,tcp 0 0
server_IP:/usr/local/linux/base/opt /opt nfs nfsvers=3,wsize=2048,tcp 0 0
server_IP:/usr/local/linux/base/lib/modules /lib/modules nfs nfsvers=3 wsize=2048,tcp 0 0
fileserver_IP:/home /home nfs nfsvers=3,wsize=2048,tcp 0 0
Also, do not forget to comment out lines that mount local partitions.
Save this file as /etc/fstab.new because it should not be activated yet,
as long as we have to boot the base system first.
You must provide the system with to files to let the users perform a login. To do this just copy the files
/etc/passwd and /etc/shadow from your file server to the base system.
Notice that you have to do it every time you add a user to the system, or a user changes
his/her password, so can best be done by creating a cron job.
To boot the base system we have to create a boot disk first. Go to the next section and create a boot disk as recommended. Please, change the 'append' line to this one:
append init=/sbin/init root=/dev/nfs
ip=X:Y:195.251.160.254:255.255.255.0:::'off'
nfsroot=Y:/usr/local/linux/base vga=0x318
(Of course, in a sigle line)
/usr/local/linux/base directory from the NFS server with the
rw,no_root_squash options.
Now boot the base system. Everything should work OK, but I don' t think that there is a possibility that you succeeded from the first boot!
There are many obscure points, that you have forgotten to edit or I have forgotten to mention.
This is the standard method to boot the base system and to add programms or a new kernel to your installation. So backup the files you have edited as well as the boot disk image.
After succeeding to boot the system, you are in a complete linux enviroment. Login as root and enjoy a first ride in your newly created system! Now comes the hard time... You have to disable some services that startup automatically and remove some programms not needed by the users.
Nearly all distributions start these services:
inetd, the Internet superdeamon responsible for starting other deamons like telnet, ftp etc.syslogd, the logging deamon. Not needed on a diskless client not needed because all the modifications are done to files easyly replacable.httpd, the apache webserver. Not needed for obvious reasons.dhcpclient. Needed for automatic aquisition of an IP address. At out case, this is done by the kernel.lpd, the line printer deamon. This is needed only when you have a printer connected to a host. In most cases, this is not needed./etc/rc.d/X.
There is a more elegant way to do this under SuSE or RedHat, using Yast or Linuxconfig.
For Yast, go to System administration ---> Change configuration file and using search locate the entries for every service you want to stop.
Then, uninstall all these services from the base system. The only service that seems reasonable to me to be left running is the NameServer caching deamon, which is able to reduce network traffic a lot.
Now, you have to edit some files:
/etc/resolv.conf Used to provide a nameserver. Add these
entries: nameserver xxx.xxx.xxx.xxx and domain xxxxx ,
replacing x with the correct values./etc/hosts Used to match IP addresses to host names localy. Provide the basic servers' names of
your network./etc/nntpserver Used to provide a news server. Just append the nameserver 's hostname./etc/fstab Restore the fstab.new file we have created earlier.Perhaps, you do not leave in the US or the UK, like me, so you have to configure the language.
This is simply done through the .profile file. Just add the following:
export LANG="X"where X is your natural language. Then, download a console font which supports your codepage
and set, with the help of Yast, the keyboard keymap.
Copy .profile to /etc/skel of the file server or to all the users' home directories.
If you want to provide a working X enviroment for clients with different graphics hardware,
you have to use the XFBDev server. If you followed the instructions on howto create a boot disk,
you would now be in framebufer mode at 1024x768@16M colors, which is sufficient for use with X windows.
Now, you have to configure the X server to load the framebuffer driver. SuSE provides an exellent tool for configuring
X wherher it might be version 3 or 4. It is called sax for X 3.3.x and sax2 for X 4.x.
To use XFBDev driver start sax with the -s XF86_FBDev option and configure the server according to your hardware.
In case you do not use SuSE, most of the work must be done by hand.
Create a basic /etc/X11/XF86Config file using xf86config4.
Please choose entries that are as much as possible closer to your needs. Then edit the /etc/X11/XF86Config.
This file is devided into sections that start with the keyword 'Section' and end with 'EndSection'.
Do the following modifications:
Option "Buttons" "5"
Option "ZAxisMapping" "4 5"
BoardName "AutoDetected"
Driver "fb"
Identifier "Device[0]"
VendorName "AutoDetected
Identifier "Modes[0]"
Modeline "1024x768" 71.39 1024 1040 1216 1 400 768 768 776 802
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1024x768"
EndSubSection
Device "Device[0]"
Identifier "Screen[0]"
Monitor "Monitor[0]"
Identifier "Layout[all]"
InputDevice "Keyboard[0]" "CoreKeyboard"
InputDevice "Mouse[1]" "CorePointer"
Screen "Screen[0]"
XF86Config and the xf86cfg4 man pages. You will find a working XF86Config file at Appendix C.
KDE is the most extensible, configurable and internet enabled window manager available, even if we count some commercial ones that are proud of it! To download KDE, ftp to ftp.kde.org and get the rpms for your distribution. There, you can also find vanilla sources and other related projects.
The main configuration to KDE is done through the K Control Center.
There you can find options for configuring the fonts, colors, backgrounds etc.
The most important thing you can configure is the LAN browsing deamon that KDE incorporates, lisa.
There is also a readme file under \$KDE2ROOT/share/apps/lisa.
After you configure lisa, you have to make it (or her?) start in the background every time the computer is started.
Find the lisa 's configuration file under /root. Copy it under /etc.
Aftewards, place the command lisa -c /etc/lisa.conf at the /etc/rc.d/boot.local file,
or the similar for your installation. Now tell me, which is easiest to search a network Windows or Linux?
If your users are coming from the Windows world, they are familiar to find programms at the
damned 'Start' menu. To make their transition easy, edit the KDE menu with the Menu Editor programm and
add or remove applications there. Then, copy the .kde2 directory from you directory to the /etc/skel directory
of your file server. Every new account you create will have access to the menu (and the settings) you have created.
To prepare a boot disk we just want a kernel, syslinux and a 1,44MB diskette. Syslinux is tiny boot
loader, designed specifically to boot a kernel and pass some arguments through its command line using a diskette.
As we will see it very easy to configure, too.
Always choose the newest kernel to build. As of this time of writing (Wed Sep 12 17:28:22 2001)
the newest kernel is 2.4.9. Building an older kernel can only save you time updating the nesessary programms.
Also, be sure you have the program versions described in /usr/src/linux/Documentation/Changes.
It is a good idea to compile the kernel using the base system to be served. The kernel can be build according to
your needs of drivers, but it must contain the following options:
Network device support ---> Select your card driver).Networking options ---> IP: kernel level autoconfiguration ---> IP: BOOTP support).File systems ---> Network File Systems ---> NFS file system support
and File systems ---> Network File Systems ---> NFS file system support ---> Root over NFS).
Block devices ---> Loopback device support).base/lib/modules directory
of the exported directory structure.
The new kernel resides at /usr/src/linux/arch/i386/boot.
You also have to set the root device to your kernel. You have to use the rdev programm. Execute the following commands:
mknod /dev/boot255 c 0 255
rdev /path/to/kernel/file /dev/boot255
Now, we have to use the syslinux programm. Insert a disk into the first floppy drive and run:
syslinux -s /dev/fd0
Mount the floppy and notice that syslinux has written 2 files: syslinux.cfg and ldlinux.sys.
The second is the boot loader executable. The syslinux.cfg is the programm configuration file.
A typical structure for that file is the following:
default linux
append init=/sbin/init root=/dev/nfs
ip=:195.251.160.10:195.251.160.254:255.255.255.0:::'bootp'
nfsroot=195.251.160.10:/usr/local/linux/ws/\%s vga=0x318
prompt 1
timeout 30
readinfo 2
The default statment is the kernel name to be booted and the append is the command line to be passed to the kernel. Now, you have to copy the kernel you have created to the floppy and rename it to 'linux'.
To boot a diskless client, its kernel must have the following command line options:
init=/sbin/init: If your init programm is elsewhere just change the path.root=/dev/nfs: An alias to say the kernel that it has to mount its root directory over nfsip: This command line option tells the kernel how to get it's IP address and which is the NFS server's addressnfsroot: Tells the kernel to mount this directory as its root. The % is an alias to the host 's IP address.vga: If you want to be able to start X windows in framebuffer mode, switch to a framebuffer mode. The one given stands for 1024x768@16M colors.All these options are discussed in detail in /usr/src/linux/Documentation/nfsroot.txt.
Read it and adjust the given command line to your needs.
Now you have created the boot disk you are ready to test the system you have build. Start the NFS and BOOTP services and boot a client with the boot disk. No one has been able to do it from the first time. So go on to the next section!
In this section will be discused all the problems that you have and the changes that you propose to the installation. Please feel free to email me and ask about any difficult or not mentioned points in this document. My email is [email protected]
Q: A DHCP is already running. How do I configure BOOTP, so as no interaction is made with the DHCP?
A: This was the main problem I faced when I installed the system on a running network. DHCP and BOOTP use the same port. When a windows client boots, it issues a DHCP/BOOTP request to locate its IP (of course in case of dynamic IP). When the DHCP server responds, it also returns the IP's of DNS servers, print servers and Domain Controlers. My BOOTP server was responding faster than the Microsoft DHCP server, an so Windows clients were unable to locate their Domain controler. This resulted to users not being able to login! The solution described here was donated by D. Spinellis.
Open the /usr/src/linux/net/ipv4 file. This is were all BOOTP autoconfiguration is done.
Search for udph.source,udph.dest variables. You will see that they are set to the standard 67/68
request/responce ports. Change BOTH values so they use an unused UDP port in your network. A good port pair that no
application uses it is 967/968. Now, start your DHCPd with the -p 967 option. Everything must be working OK!
This document is GNU copylefted by Georgios Gousios.
It is covered by the GNU documentation licence.
Permission to use, copy, distribute this document for any purpose is hereby granted, provided that the author's / editor's name and this notice appear in all copies and/or supporting documents; and that an unmodified version of this document is made freely available. This document is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, either expressed or implied. While every effort has been taken to ensure the accuracy of the information documented herein, the author / editor / maintainer assumes NO RESPONSIBILITY for any errors, or for any damages, direct or consequential, as a result of the use of the information documented herein
The author may be contacted via e-mail. For any change, question, error that must be corrected please feel free to contact me. For every contribution you make for this document, your name will be mentioned in the contributors section.
#!/usr/bin/bash
#This is a script for creating host directories using the
#directory scheme illustrated before in this document.
#It is written on Solaris and I did not test it on Linux.
#Execute it at the ws directory.
#Needs as input a file containing space separeted IP
#addresses named addr, for example bash# ./script addr
#This file must be like this: 195.251.160.10 195.251.160.11 195.251.160.13 ....
echo "Creating the tar archive"; echo
cd base
tar cpf linux.tar ./bin ./dev ./etc ./lib ./sbin ./var
mv linux.tar /usr/local/linux/ws/linux.tar
cd ..
echo "Creating host directories"; echo
for addr in $(cat addr)
do
echo "Working on host $addr"
mkdir $addr
cd $addr
echo " ---Creating nessesary directores"
mkdir boot
mkdir cdrom
mkdir floppy
mkdir home
mkdir mnt
mkdir opt
mkdir proc
mkdir root
mkdir tmp
mkdir usr
echo " ---Extracting tar archive"
ln -s ../linux.tar ./linux.tar
tar xf linux.tar
rm linux.tar
echo " ---Removing unnessesary files"
rm -R ./lib/modules/*
rm -R ./var/yp
rm -R ./var/X11R6/sax
rm -R ./var/tmp
rm -R ./var/state/dhcp
rm -R ./var/squid
rm -R ./var/run/*
rm -R ./var/opt
rm -R ./var/named
rm -R ./var/mysql
rm -R ./var/lib/amanda
rm -R ./var/lib/codadmin
rm -R ./var/lib/firewall
rm -R ./var/lib/apsfilter
rm -R ./var/lib/gdm
rm -R ./var/lib/misc
rm -R ./var/lib/nobody
rm -R ./var/lib/pcmcia
rm -R ./var/lib/pgsql
rm -R ./var/lib/rpm/*
rm -R ./var/lib/setup
rm -R ./var/lib/wvdial
rm -R ./var/lib/wwwrun
rm -R ./var/lib/xdm
rm -R ./var/lib/xkb
rm -R ./var/lib/YaST/*
rm -R ./var/lib/zope
rm -R ./var/log/*
rm -R ./var/cache/*
rm -R ./var/games
rm -R ./var/adm/*
echo " ---Deciding the hostname"
nslookup $addr |sed -n "s/^Name: *//p" >etc/HOSTNAME
cd ..
i=$(($i+1))
echo
done
echo "Removing the tar archive"
rm linux.tar
echo
exit 0
arpwatch
#!/bin/bash
#A script that starts arpwatch, pings a range of addresses and creates an
#/etc/dhcpd.conf file from the output of arpwatch.
#The arp.dat2dhcpd.conf programm is described later.
#Do not forget to edit the i variable and the while statement to specify
#the range of the addresses you want to ping
i=128;
echo "Starting arpwatch";echo
arpwatch
while [ "$i" -lt 253 ]
do
addr=195.251.160.$i
echo "Now pinging $addr"
ping -c 5 $addr >/dev/null
i=$(($i+1))
done
echo
exit
killproc arpwatch
echo "Creating /etc/dhcpd.conf"
cat /var/lib/arpwatch/arp.dat |arp.dat2dhcpd.conf >/etc/dhcpd.conf
#!/usr/bin/perl -n
($ether, $ip,$stup1,$name) = split;
if ($name eq "") {
print "
host host$i {
hardware ethernet $ether;
fixed-address $ip;
}
";
$i++;}
else{
print "
host $name {
hardware ethernet $ether;
fixed-address $ip;
}
"}
#This file should let X 4.0.1 work in 1024x768@16M colors
#with the fbdev driver using the linux's framebuffer
Section "Files"
RgbPath "/usr/X11R6/lib/X11/rgb"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/local"
FontPath "/usr/X11R6/lib/X11/fonts/misc:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi:unscaled"
FontPath "/usr/X11R6/lib/X11/fonts/Type1"
FontPath "/usr/X11R6/lib/X11/fonts/URW"
FontPath "/usr/X11R6/lib/X11/fonts/Speedo"
FontPath "/usr/X11R6/lib/X11/fonts/misc"
FontPath "/usr/X11R6/lib/X11/fonts/75dpi"
FontPath "/usr/X11R6/lib/X11/fonts/100dpi"
FontPath "/usr/X11R6/lib/X11/fonts/PEX"
FontPath "/usr/X11R6/lib/X11/fonts/cyrillic"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/misc"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/75dpi"
FontPath "/usr/X11R6/lib/X11/fonts/latin2/100dpi"
FontPath "/usr/X11R6/lib/X11/fonts/latin7/75dpi"
FontPath "/usr/X11R6/lib/X11/fonts/kwintv"
FontPath "/usr/X11R6/lib/X11/fonts/truetype"
FontPath "/usr/X11R6/lib/X11/fonts/uni"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/misc"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/75dpi"
FontPath "/usr/X11R6/lib/X11/fonts/ucs/100dpi"
FontPath "/usr/X11R6/lib/X11/fonts/xtest"
EndSection
Section "ServerFlags"
AllowMouseOpenFail
EndSection
Section "Module"
EndSection
# This section is no longer supported
# See a template below
# Section "XInput"
# EndSection
Section "Keyboard"
Protocol "Standard"
XkbRules "xfree86"
XkbModel "microsoft"
XkbLayout "us"
EndSection
Section "Pointer"
Protocol "PS/2"
Device "/dev/psaux"
SampleRate 60
BaudRate 1200
Buttons 5
EndSection
Section "Monitor"
Identifier "Primary-Monitor"
VendorName "Unknown"
ModelName "Unknown"
HorizSync 29-64
VertRefresh 47-90
Modeline "1400x1050" 59.93 1400 1416 1704 1816 1050 1050 1055 1097
Modeline "1280x960" 59.90 1280 1296 1552 1664 960 960 965 1003
Modeline "1600x1000" 59.90 1600 1616 1968 2080 1000 1000 1004 1044
Modeline "1024x864" 59.89 1024 1040 1216 1328 864 864 870 902
Modeline "800x600" 58.55 800 816 928 1040 600 600 608 626
Modeline "1152x864" 59.99 1152 1168 1384 1496 864 864 870 902
Modeline "1280x1024" 59.90 1280 1296 1552 1664 1024 1024 1029 1070
Modeline "640x480" 37.44 640 656 720 832 480 480 486 501
Modeline "1024x768" 59.89 1024 1040 1216 1328 768 768 774 802
Modeline "1600x1200" 59.90 1600 1616 1968 2080 1200 1200 1204 1253
EndSection
Section "Device"
Identifier "Primary-Card"
VendorName "---AUTO DETECTED---"
BoardName "---AUTO DETECTED---"
EndSection
Section "Screen"
Driver "fbdev"
Device "Primary-Card"
Monitor "Primary-Monitor"
DefaultColorDepth 16
SubSection "Display"
Depth 32
Modes "default"
EndSubSection
SubSection "Display"
Depth 24
Modes "default"
EndSubSection
SubSection "Display"
Depth 16
Modes "default"
Virtual 1024 768
EndSubSection
SubSection "Display"
Depth 8
Modes "default"
EndSubSection
EndSection
Section "Screen"
Driver "fbdev"
Device "Primary-Card"
Monitor "Primary-Monitor"
DefaultColorDepth 16
SubSection "Display"
Depth 32
Modes "default"
EndSubSection
SubSection "Display"
Depth 24
Modes "default"
EndSubSection
SubSection "Display"
Depth 16
Modes "default"
Virtual 1024 768
EndSubSection
SubSection "Display"
Depth 8
Modes "default"
EndSubSection
EndSection