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From: Digestifier <Linux-Admin-Request@senator-bedfellow.mit.edu>
To: Linux-Admin@senator-bedfellow.mit.edu
Reply-To: Linux-Admin@senator-bedfellow.mit.edu
Date: Sat, 10 Sep 94 19:13:25 EDT
Subject: Linux-Admin Digest #47
Linux-Admin Digest #47, Volume #2 Sat, 10 Sep 94 19:13:25 EDT
Contents:
Re: [ALERT] Password problem with Linux (Mark A. Horton KA4YBR)
Re: Drives with too many heads (Mark A. Horton KA4YBR)
Doom HAS no pixel doubling (Byron Faber)
Re: Newbie Inetd.conf & telnetd question (Miguel de Icaza)
Setting up Sound Blaster Pro (Paul Julie)
How send a break on a serial line? (Hans-Georg von Zezschwitz)
Re: Doom HAS no pixel doubling (Christopher Wiles)
Re: fsck during boot (Oz Dror)
Just Getting Started (Richard Manganel)
Re: DOMM 4 Linux /X is OUT !!! (Jan Fure)
Re: 20 Mb RAM: Linux sees 16Mb (Robert Stockmann)
Re: Multiple xterms in Seyon? (Mike Gaffney)
Re: FTAPE...Im' soo close, yet so far???? (William Huang)
----------------------------------------------------------------------------
From: mah@ka4ybr.com (Mark A. Horton KA4YBR)
Subject: Re: [ALERT] Password problem with Linux
Date: Sat, 10 Sep 1994 10:05:07 GMT
Craig Woodward (cdw@cci.com) wrote:
: In article <34icuj$6gm@pandora.sdsu.edu>,
: Tracy R. Reed <treed@ucssun1.sdsu.edu> wrote:
: >James Beckwith (beckwith@io.org) wrote:
: >: Any suggestions about using a cracker to check out new passwords before
: >: saving them?
: >
: >There are a couple of utilities on sunsite that do this. One is called
: >Crack, I don't remember what the other is called.
: Using Crack in this manner is kind of akin to killing ants with
: a hammer. Look for programs like uva.passwd. It may take a little patching
: to work but it should be happy. I *think* I put my linux-patched version
: of patch on ftp.csh.rit.edu:/pub/linux/system/? But it's not that big of a
: switch. It checks for simple user info and scans for dictionary (and partial
: match) passwords. IT takes a few seconds longer to change a password, but
: it's happy. :)
: -Woody
Good suggestion, Woody... It's also a good idea to occasionally run
crack and the cops programs to hunt for system security weaknesses that may
been induced accidentally during normal administration. It takes
a few iterations at first to get things all cleaned up, but then running it
via cron every week or so will keep you on top of things. (hopefully
BEFORE the weasels find the holes in the fences!) :)
-- mark
--
"Ask me about my OTHER operating systems ... SunOS, Solaris, SCO,
AIX... On second thought, WHY?"
============================================================
Mark A. Horton ka4ybr mah@ka4ybr.atl.ga.us
P.O. Box 747 Decatur GA US 30031-0747 mah@ka4ybr.com
+1.404.371.0291 33 45 31 N / 084 16 59 W
------------------------------
From: mah@ka4ybr.com (Mark A. Horton KA4YBR)
Subject: Re: Drives with too many heads
Date: Sat, 10 Sep 1994 10:45:54 GMT
Stephen Vance (srvance@unix.secs.oakland.edu) wrote:
: I hate to post this subject again, and heartily apologize in advance; I did
: not think that it would apply to me. I am trying to install Linux on a new
: laptop (Slackware 1.2). Using the 'bare' boot disk, I get the message
: hd.c: ST-506 interface disk with more than 16 heads detected
: probably due to non-standard sector translation. Giving up.
: (disk 1: cyl=524; sect=63; head=32)
: I looked at the source and there is no explanation. This leaves me unable
: to fdisk. Could someone *please* be kind enough to post or e-mail what I
: need to do to get around this???
: Thanks in advance,
: Steve
Hello Steve,
This is becoming quite common with the larger IDE drives. You
have two options, (well, more than that really, but it gets messier!).
First you can make Linux believe the DOSish CMOS description of the
drive (a little complicated) or lose 12 MB of your disk and only use
the first (REAL) 1024 cylinders (SIMPLE). The simple option first:
SIMPLE: Boot the machine and interrupt the boot to go to CMOS
configuration. On the (usually) base configuration
screen you will have the disk types (hard drives)
listed... yours may be called "user" or 47 for the
type. This is where you will find the cylinders, heads,
and sectors of the device listed. Only the number of
sectors is sacred and MUST reflect reality! The drive
you have is, in reality, a 1048 cylinder, 16 head, 63
sector device. The cylinders and heads have been
remapped to satisfy the boot and DOS views of reality
which cannot handle more than 1024 cylinders on a device.
(10 bits for addressing... 2^10 = 1024) The simple
fix is to set the cylinders to 1024 and the heads to 16,
leaving sectors as 63. This will cost you 24 cylinders
[or 24*(540/1048) MB], but will insure that everyone
is looking at the same geometry. From then on, the
install is simple and straightforward.
NOT_SO_SIMPLE: Leave your CMOS set at cyl=524; sect=63; head=32.
Boot the Linux boot kernel you've made. At the FIRST
prompt, enter the REAL disk geometry (NOT what CMOS
has set!). In this case, you would type:
ramdisk hd=1048,16,63
Continue the boot process. When told to, replace the
boot diskette with the root diskette you've chosen.
After Linux comes up, login as root and invoke
fdisk. Assuming this is the first IDE drive you are
using, type in:
fdisk /dev/hda
When fdisk starts, press "p" to see the existing
partitions. Delete any you DON'T need (hopefully in
this case all of them!) Next go to expert mode (enter
an "x") From the expert menu, change the cylinders
(type in a "c") to the CMOS setting. Likewise for
the number of heads (type in an "h"). Then return
to the main menu and define your partitions as you
would normally... with the parameters you"ve set
fdisk to use as far as number of heads and cylinders.
When done, save the new table via the "w" option.
After the partition table has been updated, continue
the install using "setup" and all should be fine. Note
that when you wish to use fdisk again, you'll have to
go through this drill all over to force it to buy what
it sees. But now Linux, DOS, and CMOS are all seeing
the same (distorted) view of reality! :)
Please note that the above techniques work with ANY drive with
more than 1024 cylinders, just adjust the numbers for cylinders
and heads as appropriate... i.e. Reduce the number of cylinders
via a factor to get it below 1024 and then multiply the number
of heads by this same factor. DO NOT MESS WITH SECTORS! This is
the one piece that actually has to be real!
-- Mark
--
"Linux! Guerrilla UNIX Development Venimus, Vidimus, Dolavimus."
============================================================
Mark A. Horton ka4ybr mah@ka4ybr.atl.ga.us
P.O. Box 747 Decatur GA US 30031-0747 mah@ka4ybr.com
+1.404.371.0291 33 45 31 N / 084 16 59 W
------------------------------
From: btf57346@uxa.cso.uiuc.edu (Byron Faber)
Subject: Doom HAS no pixel doubling
Date: 10 Sep 1994 15:41:59 GMT
I was told by a friend (rumors rumors) that the pixel doubling, etc
was NOT included because XFree can change resolutions on the fly.
So for all you FOOOOOLS out there bitching. TURN DOWN YOUR RESOLUTIONS
DUMMIES.
public service announcement, disregard if you have any intelligence.
bf
--
Real programmers don't comment their code. It was hard to write, it
should be hard to understand.
b-faber@uiuc.edu & http://www.cen.uiuc.edu/~bf11620
------------------------------
From: miguel@sphinx.nuclecu.unam.mx (Miguel de Icaza)
Crossposted-To: comp.unix.admin
Subject: Re: Newbie Inetd.conf & telnetd question
Date: 08 Sep 1994 21:16:47 GMT
: I am trying to setup our internet server to accept telnet connections at
: a specific port and directly login to an account (so that the user does
: not see a login prompt). Any ideas on how i go about doing this ?
: I have seen it done, just don't see how to do it, have looked at the
: inetd.conf file trying to figure it out...
You need to:
1. Add a new entry in the /etc/services for the new service, like:
my-telnet 9000/tcp
2. Add a new entry in the /etc/inetd.conf for the daemon that will
receive the connection:
my-telnet stream tcp nowait root /usr/sbin/mtel mtel
Now, the mtel program is a modified in.telnetd that runs your desired
login program instead of /bin/login.
Hope this helps,
Miguel.
------------------------------
From: pjulie@tse.com (Paul Julie)
Subject: Setting up Sound Blaster Pro
Date: Fri, 9 Sep 1994 19:26:39 GMT
Thanks for all of your help....I finally got my swap file
activated. (Thanks Joerg F, Mikey..etc)
However, I have a problem configuring my sound card. I have
read all of the doc to no avail.
I started configuring my sound blaster for SB pro,
did a make depend then make config. It suddently
halted when it started compiling for sound!!!!
Then I decided to compile the sound stuff myself....
and I had the following errors:
darkstar:/usr/src/linux-1.0.9/drivers/sound# make
cc -c soundcard.c
In file included from sound_config.h:226,
from soundcard.c:31:
sound_calls.h:201: warning: `struct patmgr_info' declared inside parameter lis
sound_calls.h:201: warning: its scope is only this definition or declaration,
sound_calls.h:201: warning: which is probably not what you want.
In file included from sound_config.h:227,
from soundcard.c:31:
dev_table.h:99: warning: `struct patmgr_info' declared inside parameter list
dev_table.h:103: field `info' has incomplete type
dev_table.h:121: field `info' has incomplete type
make: *** [soundcard.o] Error 1
darkstar:/usr/src/linux-1.0.9/drivers/sound#
IN fact the ultrasound.h and soundcard.h contained the following
#include<linux/soundcard.h>
So I when into linux/soundcard.h and found this!!!!
#include <linux/soundcard.h> :-(
Something wrong here, does anybody have the 2 correct files handy,
they could send me. As an attachment or something.
I really don't want to sound load the whole thing again.
Or if I had too could you give me the filename and ftp site
I could get only the sound stuff.(up-to-date of course)
I need ultrasound.h and soundcard.h.
I am using SlackWare 2.0 (FYI on diskette)
Thanks again for all of your help, I am slowing getting this going!!!
--
===================================================
The Toronto Stock Exchange
Paul Julie - Applications Specialist
Telephone: 1-416-947-4569
E-mail: pjulie@tse.com
===================================================
------------------------------
From: 1zezschw@rzdspc2.informatik.uni-hamburg.de (Hans-Georg von Zezschwitz)
Subject: How send a break on a serial line?
Date: 10 Sep 94 17:15:45 GMT
Hello,
I think I read most of the standart (RT)FM, but I cant find a answer to
this problem:
How can I send a break signal on a serial line?
(in a C-program)
And probably, somebody can tell me where to find information like this
and more (e.g. the detailed use of fcntl and ioctl for programming the
serial interface). My man-pages for those functions are very short,
probably there is more detailed version out now.
I'm trying to communicate with a medical monitor via Linux - you will not
directly save lifes by helping me, but make me happy to continue my work.
Thanks,
Georg Zeschwitz
==============================================================================
H. Georg v.Zezschwitz eMail: zeschwitz@uke.uni-hamburg.de
Muenzstr. 10 1zezschw@informatik.uni-hamburg.de
20097 Hamburg THE DAY YOU BRING
Voice: +49 40 2369342 OUT LINUX FOR WINDOWS I'LL BELIEVE IN YOU, BILL
------------------------------
From: a0017097@wsuaix.csc.wsu.edu (Christopher Wiles)
Subject: Re: Doom HAS no pixel doubling
Date: Sat, 10 Sep 1994 17:05:26 GMT
btf57346@uxa.cso.uiuc.edu (Byron Faber) writes:
: I was told by a friend (rumors rumors) that the pixel doubling, etc
: was NOT included because XFree can change resolutions on the fly.
Bullshit, sir. Check the README.
: So for all you FOOOOOLS out there bitching. TURN DOWN YOUR RESOLUTIONS
: DUMMIES.
Know whereof you speak before you post such.
: public service announcement, disregard if you have any intelligence.
Disregard your advice if one has any intelligence? That's a thought ...
-- Chris
a0017097@wsuaix.csc.wsu.edu wileyc@halcyon.com wileyc@quark.chs.wa.com
"... but I want to use all eight comm ports SIMULTANEOUSLY!"
PGP 2.6 public key available by finger for the clinically paranoid.
------------------------------
From: dror@netcom.com (Oz Dror)
Subject: Re: fsck during boot
Date: Sat, 10 Sep 1994 18:22:00 GMT
looking at the script in /etc/rc.d/rc.S
...
# Test to see if the root partition is read-only, like it ought to be.
READWRITE=no
if echo -n >> "Testing filesystem status"; then
rm -f "Testing filesystem status"
READWRITE=yes
fi
# Check the integrity of all filesystems
if [ ! $READWRITE = yes ]; then
/sbin/fsck -A -a
...
It seems that fsck -a -A is performed. If everything is as it should be
i.e., the root file system is read-only. regardless of any boot or
shutdown problem.
-Why?
-Oz
--
NAME Oz Dror, Los Angeles, California
SMAIL dror@netcom.com
PHONE (213) 874-7978 Fax (213) 874-7965
------------------------------
From: manganel@gate.net (Richard Manganel)
Subject: Just Getting Started
Date: 10 Sep 1994 21:42:08 GMT
I've read enough about Linux to pique my interest but don't really
know how to get started. I've downloaded some stuff but it all appears
to be text material. Shouldn't there be a .com or .exe file like there
is with Dos or Windows?
Since I spend some time on a Unix network, I'm somewhat familiar with
it. I do get a little confused about some of the files I see listed when
I go to download from ftp site (tar, Z, etc.). Are they all handled by
gunzip?
Anything you can suggest to get Linux installed on my 386-33 would be
appreciated.
------------------------------
From: fure@owlnet.rice.edu (Jan Fure)
Subject: Re: DOMM 4 Linux /X is OUT !!!
Date: 10 Sep 1994 19:49:51 GMT
Hi:
Thanks for many helpful replies pointing out that I probably
downloaded linxdoom.tgz in ascii format instead of binary!
This proved to be the case, so sorry for the wasted bandwith,
and again, thanks to you who replied!
(I guess I'm tainted as an ftp-newbie for life now :-)
Jan
------------------------------
From: stock@dutsh7.tudelft.nl (Robert Stockmann)
Subject: Re: 20 Mb RAM: Linux sees 16Mb
Date: Sat, 10 Sep 1994 20:42:01 GMT
In <Cvw9vn.E8E@news.tudelft.nl>, Robert Stockmann (stock@dutsh7.tudelft.nl) wrote:
: Now when I boot Linux (32-bit OS) I still get 'only' 16 Mb RAM
: instead of 20Mb. YES I have disabled the 16 Mb RAM limit in the kernel:
: bool 'Limit memory to low 16MB' CONFIG_MAX_16M n
: What is happening here???
: My Machine:
: HP 486 EISA 25MHz, with 20 Mbyte RAM, cache in 486 chip,
: memory burstmode accessed by HP-designed onboard chip.
: Adaptec Fast SCSI-2 1740 EISA controller
: Fujitsu Fast SCSI-2 harddisk M2624F-512
: Toshiba Fast SCSI-2 CDROM drive XM-3401TA
: ESDI harddisk controller with 150MB Micropolis drive
: ATI Graphics Ultra PRO EISA (Mach 32)
: Soundblaster PRO sound card
: My OS:
: Linux SLackware PRO 2.0 (kernel 1.0.9) XFree 2.1.1
Well I couldn't live with this! Spent mony for 4Mb for nothing?
Noway!, So I thought lets look in the kernel sources, and
it looked quit easy to hack it ....I added the following line
in init/main.c:
memory_end = 20*1024*1024;
so that the resulting code looks like this:
asmlinkage void start_kernel(void)
{
/*
* Interrupts are still disabled. Do necessary setups, then
* enable them
*/
set_call_gate(&default_ldt,lcall7);
ROOT_DEV = ORIG_ROOT_DEV;
drive_info = DRIVE_INFO;
screen_info = SCREEN_INFO;
aux_device_present = AUX_DEVICE_INFO;
memory_end = (1<<20) + (EXT_MEM_K<<10);
memory_end &= PAGE_MASK;
ramdisk_size = RAMDISK_SIZE;
copy_options(command_line,COMMAND_LINE);
#ifdef CONFIG_MAX_16M
if (memory_end > 16*1024*1024)
memory_end = 16*1024*1024;
#endif
memory_end = 20*1024*1024; /* give me 20! */
if (MOUNT_ROOT_RDONLY)
root_mountflags |= MS_RDONLY;
if ((unsigned long)&end >= (1024*1024)) {
memory_start = (unsigned long) &end;
low_memory_start = PAGE_SIZE;
} else {
memory_start = 1024*1024;
low_memory_start = (unsigned long) &end;
}
low_memory_start = PAGE_ALIGN(low_memory_start);
memory_start = paging_init(memory_start,memory_end);
if (strncmp((char*)0x0FFFD9, "EISA", 4) == 0)
EISA_bus = 1;
.
.
.
.
etc..
kernel boot-up messages are now:
Console: colour EGA+ 80x25, 8 virtual consoles
Serial driver version 3.99a with no serial options enabled
tty00 at 0x03f8 (irq = 4) is a 16550A
tty01 at 0x02f8 (irq = 3) is a 16550A
lp_init: lp1 exists, using polling driver
snd2 <SoundBlaster Pro 3.2> at 0x220 irq 5 drq 1
snd1 <Yamaha OPL-3 FM> at 0x388 irq 0 drq 0
Calibrating delay loop.. ok - 12.42 BogoMips
Configuring Adaptec at IO:4c80, IRQ 11
scsi0 : Adaptec 1740
scsi : 1 hosts.
Vendor: FUJITSU Model: M2624F-512 Rev: 0405
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, id 0, lun 0
Vendor: TOSHIBA Model: CD-ROM XM-3401TA Rev: 0283
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, id 4, lun 0
scsi : detected 1 SCSI disk 0 tapes 1 CD-ROM drive total.
Scd sectorsize = 2048 bytes
Memory: 19196k/20480k available (560k kernel code, 384k reserved, 340k data)
This processor honours the WP bit even when in supervisor mode. Good.
Floppy drive(s): fd0 is 1.44M, fd1 is 1.2M
Swansea University Computer Society Net2Debugged [1.30]
IP Protocols: ICMP, UDP, TCP
SLIP: version 0.7.5 (4 channels)
CSLIP: code copyright 1989 Regents of the University of California
Checking 386/387 coupling... Ok, fpu using exception 16 error reporting.
Linux version 1.0.9 (root@mymachine) #4 Fri Sep 9 21:29:34 MET DST 1994
Partition check:
sda: sda1 sda2 sda3
hda: hda1
VFS: Mounted root (ext2 filesystem).
Adding Swap: 10236k swap-space
However I still think its weird that the boot/setup.S routine
can't get my full 20 Mb RAM...
Robert Stockmann
stock@dutsh7.tudelft.nl
------------------------------
From: mgaffney@newt.mrj.com (Mike Gaffney)
Subject: Re: Multiple xterms in Seyon?
Date: 10 Sep 1994 14:01:09 -0400
Term is definately the way to go. You will still need seyon to get the initial
connection. After you are connected, just you will kick off term on the remote
machine, suspend the seyon program with the "suspend" button, kick off term on
your Linux box, and then start as many trsh sessions as you want. It's great!
I highly recommend Mosaic+term too. Once I got term itself up Mosaic+term went
fine the first time.
MJG
--
==============================================================================
These neural nuggets are mine, all mine. I wouldn't let my company take
credit for them even if they _wanted_ to.
------------------------------
From: wyhuang@sdcc15.ucsd.edu (William Huang)
Crossposted-To: comp.os.linux.misc
Subject: Re: FTAPE...Im' soo close, yet so far????
Date: 9 Sep 94 02:51:44 GMT
.... OK .... this must be a stupid question but after working for an
hour I give up ...
I just installed Slackware 2.0, kernel version 1.0.9, ftape version
0.9.10 (I think ... theres a *0.9.10.patch file in my /boot
directory). It would not work unless I'm root. Then I chmod a+rw
/dev/ftape from root. It then worked once, and then no more. There
must be an obvious answer to this .... thanks in advance for your
help.
------------------------------
** FOR YOUR REFERENCE **
The service address, to which questions about the list itself and requests
to be added to or deleted from it should be directed, is:
Internet: Linux-Admin-Request@NEWS-DIGESTS.MIT.EDU
You can send mail to the entire list (and comp.os.linux.admin) via:
Internet: Linux-Admin@NEWS-DIGESTS.MIT.EDU
Linux may be obtained via one of these FTP sites:
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End of Linux-Admin Digest
******************************