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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: Tue, 11 Oct 94 06:13:45 EDT
Subject: Linux-Admin Digest #174
Linux-Admin Digest #174, Volume #2 Tue, 11 Oct 94 06:13:45 EDT
Contents:
Re: Experiences with Archive's Python
Re: /etc/utmp not writable by xterm's. Why? (Jim Ockers)
Re: mpeg_play for linux (Tom Vaughan)
Re: Please don't post sec (Riku Saikkonen)
sendmail + _IDA_ ? (Riku Saikkonen)
Re: Yggdrasil & large SCSI disk??? (Jeff Kesselman)
Re: what's wrong with my agetty? (Kenneth H. Gantz)
Re: Please don't post security holess... (S L Herbert)
Re: SCSI vs IDE (Alan Cox)
Re: SCSI vs IDE (Alan Cox)
Re: Inn on a Linux box! (Kenneth Tan)
where does screenlock get passwd from? (Kenneth H. Gantz)
Re: Problem allowing users to mount floppies (Uwe Bonnes)
Smail: How to set sender name? (Ted Harding)
Cron Problems - Script runs from shell but not cron (Ted Harding)
Re: What's failed after Bogomips (Eberhard Moenkeberg)
Re: Ftape works...Not yet (Janne Sinkkonen)
Where to find acct for 1.1.49+? (Andrew PRUSEK)
----------------------------------------------------------------------------
From: <brashear@MR.NET>
Subject: Re: Experiences with Archive's Python
Date: Mon, 10 Oct 94 10:51:28 CST
Reply-To: <brashear@MR.NET>
On 8 Oct 1994 16:40:06 -0500,
Louis LaBash <labashl@daisy.ac.siue.edu> wrote:
>Hi,
>I'm soliciting experiences with Archive's "Python" tape drives,
>either 430NT, or 4520 models.
>
>Thanks.
>Louis-ljl-{labashl@daisy.ac.siue.edu}
>
Louis,
We use the 430NT. Had some problems with an earlier kernel (.99pl15) and
the GNU-mt program unable to do "setblk". Upgraded to 1.0.9 and was able to
use "setblk". The thing works fine.
======================================================================
Robert J Brashear brashear@oneoff.com
Technical Services Manager 76450.3557@compuserve.com
The One-Off CD Shop Minneapolis 74660.2625@compuserve.com
612-374-4643 (voice)
612-374-3901 (fax)
------------------------------
From: ockers@carnot02.maem.umr.edu (Jim Ockers)
Subject: Re: /etc/utmp not writable by xterm's. Why?
Date: Sun, 9 Oct 1994 22:07:25 GMT
Reply-To: ockers@umr.edu
Lars Hofhansl (lars@hboix1.enet.dec.com) wrote:
: In article <1994Oct4.164349.8307@excaliber.uucp>, joel@wam.umd.edu (Joel M. Hoffman) writes:
: >
: >The /etc/utmp file doesn't seem to record any logins via xterms ---
: I noticed this behavior too, and I wondered how the good old
: xterm managed writing to utmp. It's quite simple: xterm is setuid root.
: So I set rxvt uid root, and it works.
: So far I could not see any security holes... Is that true?!
As I understand it having suid root xterms is a security hole, although I
can't give a specific example. It just makes me nervous. I don't know
what would happen on a suid root xterm if someone were to do something
like xterm -e <command> .
Regardless, the problem seems to be non-init clients (such as xterm or
rxvt) reporting themselves to init as logins. xdm actually supports this;
look into the sessreg command. I have been unable to get sessreg to work
however because the sysVinit that I have does wierd things with utmp and
wtmp such that sessreg cannot write to them. I have not seen a drop-in
solution to the sessreg problem and am still waiting to see if one turns
up.
I have a program that someone wrote which handles the sessreg function but
the author said that it functioned unreliably when he started using a
getty on his modem; then init was messing up the utmp and wtmp files and
his program was unable to write to them correctly. If you want to see the
program I can mail it to you...
However if someone telnets in and starts an xterm then sessreg wouldn't
see it and you still wouldn't have a record of the login.
--
Jim (ockers@umr.edu) Ask me about Linux!
PGP public key available upon request, or from my web pages.
GE d? p c++ l++ u++ e++ m++(--) s n-(+) h+ f !g w+ t+ r !y
<a href="http://www.umr.edu/~ockers/">home page</a>
------------------------------
From: vaughan@beast.nhn.uoknor.edu (Tom Vaughan)
Subject: Re: mpeg_play for linux
Date: 7 Oct 94 15:10:52 GMT
klevemmc@miner.usbm.gov (Klevemann) writes:
>Anyone know where I can get an mpeg_play for linux ?
grep INDEX.whole from sunsite.unc.edu
Thomas
------------------------------
Subject: Re: Please don't post sec
From: riku.saikkonen@compart.fi (Riku Saikkonen)
Date: Mon, 10 Oct 94 20:17:00 +0200
>>I'm rather unconfortable with the posting of all of these security holes.
>I disagree completely. This information should be disseminated freely.
>I want to know everything about any real or potential security problems
>with my computer. The reasons for this should be obvious. Linux, in
I too am for reporting everything at once. How else will the things get
fixed? And, the truth often is that once someone discovers a security
hole, it soon spreads to the 'crackers'. Isn't it better for every
sysadmin to know and be able to fix the thing than for only a small
group of crackers to know it?
-=- Rjs -=- riku.saikkonen@compart.fi - IRC: Rjs
"From cavern pale the moist moon eyes / the white mists that from earth
arise / to hide the morrow's sun and drip / all the grey day from each
twig's tip." - J. R. R. Tolkien
------------------------------
Subject: sendmail + _IDA_ ?
From: riku.saikkonen@compart.fi (Riku Saikkonen)
Date: Mon, 10 Oct 94 20:17:00 +0200
Stupid question, I know...
What is the difference between sendmail and sendmail+IDA?
E-mail, I'll summarise.
-=- Rjs -=- riku.saikkonen@compart.fi - IRC: Rjs
"From cavern pale the moist moon eyes / the white mists that from earth
arise / to hide the morrow's sun and drip / all the grey day from each
twig's tip." - J. R. R. Tolkien
------------------------------
Crossposted-To: comp.os.linux.help
From: jeffpk@netcom.com (Jeff Kesselman)
Subject: Re: Yggdrasil & large SCSI disk???
Date: Sat, 8 Oct 1994 20:24:43 GMT
In article <372d0l$don@news.onramp.net>, <karlf@acm.org> wrote:
>
>In article <jeffpkCx6FsC.6Hs@netcom.com>, <jeffpk@netcom.com> writes:
>>
>> I dunno if this will help you any, but what I did with my ncr5380 generic
>> driver (which can't read geometry either) was to boot up DOS and run my
>> old DOS format utility (SpeedStor in my case) and it showed me the right
>> values for the drive, which I then wrote into the front of my linux manual.
>>
>
>Jeff,
>
>as it turned out, the Summer '94 Yggdrasil has a Rev. B boot diskette
>(available via ftp) which supports the NCR 53C810 SCSI chip. So you can
>install Linux this way. But since the 1.0.19 kernel is not on the CD-ROM,
>it does not get copied to the SCSI disk - and you get an unbootable
>system.
Is this different from the ncr5380 driver that is on the fall94 cd-rom?
I'm wondering because I'm currently using that driver with my Trantor
130B, an if there is a newer more rpeferrabled river I'll switch (I have
rev b., but I haven't really examined it beyond getting my sony-cd to work.)
>
>This is probably good enough if you have an IDE disk plus a SCSI disk
>hanging off the NCR chip. Then you can install from CD-ROM with the Rev.B
>boot disk and replace the kernel by the one from the boot disk. But it
>doesn't work too well if the SCSI disk is all you have.
I may be dense, but I'm not following this. Once I found out my disk
geometry using speedstor, I was able to enter it with linux fdisk and
parition my drive. I boot fine at the moment, though not off of my HD
becuase I haven't installed the cd-rom fix yet (new kernel from rev. b).
As I understand the situation (and I may be wrong...) is that the only
time Linux actually needs the disk geometry info is during lILO boot (I'm
pretty sure I read that somewhere.) There is a table you can hand to
LILO that will set the gemoetry staticly in cases like mine, which was
what I was planning on doing some weekend when I had nothing better to do.
(Altough if this new rev b. kernel fixes the problem, I guess Ill just
finish installing it.)
In any case, my setup at the moment looks like this:
Floppy Drive A: - Boot Disk
/dev/hda - Small DOS parition and large swap partition
/dev/sda1 - root partition
/dev/sda2 - 'home' partition
------------------------------
From: kgantz@iglou.iglou.com (Kenneth H. Gantz)
Subject: Re: what's wrong with my agetty?
Date: Sun, 9 Oct 1994 00:02:50 GMT
gert@greenie.muc.de (Gert Doering) writes:
>kgantz@iglou.iglou.com (Kenneth H. Gantz) writes:
>>I'm trying to add a dumb terminal to my linux machine.
>>Here's what I've done so far. I've connected an ADDS terminal
>>to my comm 3 port via a null modem cable. I placed the following
>Just a guess: try a full-featured cable, or change your cable to make sure
>that the CTS, DSR and DCD lines are active on the Linux side (wire them to
>DTR). Possibly the kernel flow control gets confused by not connected
>(i.e. floating) control lines.
>gert
>--
>Yield to temptation ... it may not pass your way again! -- Lazarus Long
> //www.muc.de/~gert
>Gert Doering - Munich, Germany gert@greenie.muc.de
>fax: +49-89-3243328 gert.doering@physik.tu-muenchen.de
Actually, now that I've done some more testing, I think I have a plain
old irq conflict. I have a mouse on com 2, my modem on com 1 and the dumb
terminal on com 3. According to everything I've read com 1 and com 3 share
the same irq as does com 2 with com 4. My BIOS lets me choose different
irq settings from what the defaults are supposed to be but I noticed that
when I boot linux it says that com 1 and 3 are set to irq 4 (even though
my BIOS says com 1 is on 4 and com 3 is on 5). I tried moving the dumb
terminal to com 4 and it worked fine but, as expected, my mouse died.
So how is one supposed to get the convenience of a mouse and a modem and
still be able to connect an dumb terminal at the same time?
--
Ken Gantz
kgantz@iglou.com
Work - 502.329.3724 IT IS NOT A PROBLEM OF WHETHER MACHINES THINK,
FAX - 502.329.6199 BUT WHETHER MEN DO. - B.F. Skinner
------------------------------
From: cs1slh@stoat.shef.ac.uk (S L Herbert)
Subject: Re: Please don't post security holess...
Date: 10 Oct 1994 19:15:55 GMT
Isis Leslie (sheela@er7.rutgers.edu) wrote:
: I'm rather unconfortable with the posting of all of these security holes.
: For a while I was under the impression that this was a no-no, and that
: while sure, posting a "fix" or "work around will tell those in the know
: just what the whole is, at least it makes it a little tougher.
Go read comp.unix.security, where there's a lot more information on this.
Having the *complete* information on what a fault is can be essential -
if you are running a network which includes machines of different types,
being able to check the bug on all these machines makes a big difference.
Simply knowing there is an unspecified bug for a small list of platforms is
hardly ideal - how do you know that whoever compiled the list bothered to check
all your platforms?
: I had the smail hole fixed for a while, but none the less imediately after
: the post to the announce group I had about 15 incidents of people trying to
: mail to /etc/passwd. (Remotely and they were too stupid to not make it
: so I couldn't get their user id's...go figure)
If someone uses this stuff to break your box - that's what the police are
there for. Just because you give someone a car, it don't mean that they've
the right to run you down.
Stuart
--
Stuart Herbert Academic Computing Services, University of Sheffield
UNIX Support (0114) 282 4254 (External) / Ext 4254 (Internal)
------------------------------
From: iialan@iifeak.swan.ac.uk (Alan Cox)
Subject: Re: SCSI vs IDE
Date: Mon, 10 Oct 1994 18:42:08 GMT
In article <wvi.781342033@bambam> wvi@dasc.nl (Wouter Visscher) writes:
>every disk attached to without having to wait for the disk ( controller )
>to finish, this in contrast with IDE where you wait. For this reason
>the new ENHANCED IDE has two busses 1 for fast devices and one for slow
>devices, notably cdroms.
Even with SCSI you often have two scsi controllers as CD-ROMS often tie the bus
for ages with their low transfer rate. I'm in the middle of finishing
sorting out our computer society system once we get a bigger case - then it
will be 2 IDE controllers, 3 IDE drives, 2 SCSI drives on a SCSI controller,
4 serial ports, 3 parallel ports, ethernet and floppy on one ISA bus.
I suspect bus contention becoming a performance issue 8)
Alan
--
..-----------,,----------------------------,,----------------------------,,
// Alan Cox // iialan@www.linux.org.uk // GW4PTS@GB7SWN.#45.GBR.EU //
``----------'`----------------------------'`----------------------------''
------------------------------
From: iialan@iifeak.swan.ac.uk (Alan Cox)
Subject: Re: SCSI vs IDE
Date: Mon, 10 Oct 1994 18:47:55 GMT
In article <36t84s$pb0@dhp.com> panzer@dhp.com (Panzer Boy) writes:
>Umm, I have three LED's on my computer, plus a panel for stupid speed. I
>have 3 drive controllers hooked up to the "HD, Turbo, and Power" LED's.
>I don't anyone who uses turbo for more than minor kicks, and if you can't
>tell you're computer is on, maybe you need your head examined. Of
>course, if you only have 1 led, this could be a problem.
Definitely we need more LEDs. I've got the turbo wired to the carrier detect
on the amateur radio PI2 card 8)
Alan
--
..-----------,,----------------------------,,----------------------------,,
// Alan Cox // iialan@www.linux.org.uk // GW4PTS@GB7SWN.#45.GBR.EU //
``----------'`----------------------------'`----------------------------''
------------------------------
From: kenneth@bbs.sas.ntu.ac.sg (Kenneth Tan)
Subject: Re: Inn on a Linux box!
Date: 8 Oct 1994 01:20:52 GMT
Nathan Stratton (nstn@netcom.com) wrote:
>This is what my syslog look like:
>Oct 2 16:46:23 NovaNet innd: ME bad_newsfeeds no feeding sites
in /usr/lib/news/newsfeeds
make sure you have the entry:
ME\
:*,!control,!junk::
>Oct 2 16:46:24 NovaNet innd: ME internal no control and/or junk group
You will also have to create (just for the heck of it), two newsgroups,
known specifically as "control" and "junk". Just put these into the
/usr/lib/news/active file (the hard way). The proper way is to use
ctlinnd to create the groups for you (dunno how... just do it the hard way:)
Good Luck!
Kenneth "Automan" Tan
------------------------------
From: kgantz@iglou.iglou.com (Kenneth H. Gantz)
Subject: where does screenlock get passwd from?
Date: Sun, 9 Oct 1994 00:12:08 GMT
I sure home someone can help me with this. I just finished
installing util-linux-1.10.bin.gz and I thought I followed the
instructions and warnings carefully but now I have a problem.
If I lock the screen with xlock it doesn't believe my password
when I try to unlock the screen. I have no trouble logging into
multiple virtual consoles so I know both I and my system know the
correct password. This happens to all user accounts. How do I get
xlock to believe real passwords again?
--
Ken Gantz
kgantz@iglou.com
Work - 502.329.3724 IT IS NOT A PROBLEM OF WHETHER MACHINES THINK,
FAX - 502.329.6199 BUT WHETHER MEN DO. - B.F. Skinner
------------------------------
From: bon@lte.e-technik.uni-erlangen.de (Uwe Bonnes)
Subject: Re: Problem allowing users to mount floppies
Date: Sat, 8 Oct 1994 09:27:57 GMT
Jonathan Mohr (mohrj@augustana.ab.ca) wrote:
> I added a line to /etc/fstab to try to allow users to mount floppies on /mnt:
> /dev/fd0 /mnt msdos user,rw,noauto,sync
> However, when trying to mount a floppy as a normal user, I got the error
> message:
> can't create lock file /etc/mtab~: Permission denied
> To avoid this, should I:
> 1. Make /etc writable by users? [Seems like overkill]
> 2. Make 'mount' suid? [Sounds dangerous]
> 3. Use the package 'usermount' instead?
If you have an unpatched 1.1.51 kernel, get 1.1.52. It fixes some
floppy-bugs. Even more recent floppy-developments can be followes on
ftp.imag.fr:pub/Linux/ZLIBC.
--
Uwe Bonnes bon@lte.e-technik.uni-erlangen.de
------------------------------
From: Ted.Harding@nessie.mcc.ac.uk (Ted Harding)
Subject: Smail: How to set sender name?
Date: 11 Oct 1994 05:38:17 -0400
Reply-To: Ted.Harding@nessie.mcc.ac.uk (Ted Harding)
I too have got precisely as far as Andy Dickinson (see below) and
encountered exactly the same problems. The only solution I have
been able to implement is to create a user account on my own machine
in the same name ("efh") as on the mail-server wich I connect to,
and to be logged in on my own machine as "efh" for mail purposes,
even though I would like to send mail from "root" or "ted" on my
machine. This is feasible, even though inconvenient, on a Linux
machine because of tghe ease of switching between virtual consoles.
Using "selection" to copy chunks of text between consoles also helps.
My smail is Smail3.1.28.1 #28.1.
*** I would however like to ask for anyone who knows how "smail" ***
*** works to explain why the "sender_env_variable" option in the ***
*** smail config file apparently does not work - or how to get ***
*** it to work. Alternatively, since there is apparently scope ***
*** for the config file to do some processing in its programming ***
*** language, is there something one can do on this front? This ***
*** would enable something else which would be very useful: my ***
*** wife also uses the machine, so a config which could achieve ***
*** the following would be very helpful: ***
*** ***
*** if $user="ted" or $user="root" then user="efh" ***
*** else if $user="cigdem" then user="cb" ***
*** ***
*** so that mail appears to be sent by either "efh" or "cb" as ***
*** appropriate. Despite repeated attempts to achieve this by ***
*** all apparent plausible means, nothing has been achieved. ***
| I am trying to configure smail to send out mail messages with a sender
| name which is different than my login name. I need to do this because
| I cannot receive mail on my local machine -- I use a SLIP connection.
|
| I need to make mail messages appear as though they were sent from the
| machine which actually receives my mail so that people will be able to
| reply to them.
|
| I've figured out part of this problem -- by setting the "visible_name"
| attribute in the config file I can make messages appear as though they
| were sent from my mail-receiving machine.
|
| The problem is, however, that the messages are still sent out with my
| local username. My username on my local machine is different from my
| username on the mail-receiving machine.
|
| From reading the smail(5) man page, it looks as though I may be able
| to do what I want by setting the sender_env_variable attribute in the
| config file. This attribute is supposed to let users change the
| sender name used in a mail message by setting an environment variable.
| Unfortunately, this doesn't seem to work -- smail doesn't seem to use
| this attribute.
|
| I've also tried setting the from_field and return_path_field
| attributes to produce the desired username, but messages still arrive
| with the local username instead of the one I specify.
|
|
| Can someone tell me how to set the sender name in smail?
|
| I'm using Smail3.1.28.1 #28.5.
|
------------------------------
From: Ted.Harding@nessie.mcc.ac.uk (Ted Harding)
Subject: Cron Problems - Script runs from shell but not cron
Date: 11 Oct 1994 05:38:17 -0400
Reply-To: Ted.Harding@nessie.mcc.ac.uk (Ted Harding)
Brian Kramer asks:-
| I am having trouble with some scripts running fine from a prompt, but not
| from cron. Here's one of the scripts. Anyone else have problems like this?
I notice that this script includes lines like
backupmenu()
{
echo "Usage backup <what>\n"
echo "<what>: full (Full backup) ";
echo " root (Root partition /) ";
echo " news (News Spool partition /usr/spool/news) ";
echo " user (User partition /home/home1) ";
echo " nn (NN partition /usr/spool/nndb) ";
echo " inn (Inn partiton /usr/lib/news)\n ";
}
Now, where are the "echo"s supposed to appear when the script is run by
cron? And what console is the input supposed to come from?
When the script is run from a prompt, stdout (and stderr) will
appear on the screen where the prompt is, which can be found out from
the system admin files (utmp I think). Cron doesn't know what console
the script is supposed to write to. One solution would be to reserve
a particular console (I use /dev/tty1) as "system console", so that
the 1st two lines above, for instance, could be changed to
echo "Usage backup <what>\n" > /dev/tty1 2>&1
echo "<what>: full (Full backup) "; > /dev/tty1 2>&1
My guess is that if all lines of the script which write to stdout were
changed to write >/devtty1 2>&1, and all lines which read from stdin
were changed to read </dev/tty1, then the script would work. Could
be wrong - this suggestion is necessary but may not be sufficient!
Ted. (Ted.Harding@nessie.mcc.ac.uk)
------------------------------
Date: Sun, 09 Oct 1994 14:30:13 +0100
From: Eberhard_Moenkeberg@p27.rollo.central.de (Eberhard Moenkeberg)
Subject: Re: What's failed after Bogomips
Hello Eduardo Jacob Taquet and all others,
on 30.09.94 Eduardo Jacob Taquet wrote to All in USENET.COMP.OS.LINUX.ADMIN:
EJT> I found that when booting Linux, just after bogomips line, (33.. Ok), i
EJT> get a failed that seems not to be related to anything. Does anybody know
EJT> what is this about?
The Sony CDROM driver is just telling you that you have failed to
build your own kernel. ;-)
Greetings ... Eberhard
------------------------------
From: janne@avocado.pc.helsinki.fi (Janne Sinkkonen)
Subject: Re: Ftape works...Not yet
Date: 11 Oct 1994 00:49:14 +0200
Peter Dalgaard SFE <pd@kubism.ku.dk> wrote:
>GZIP=-1 time nice -n -18 tar cvzlb 58 /
>
>('b 58' == 58 512b blocks == 29k == 1 tape sector, fastest gzip
>option, nice it to very high priority or X context switches get
>in the way, 'l' == don't cross filesystems (in particular not
>/proc !) Someone else said that just using the --block-compress
>option works well too.
I use a backup-1.0x utility from sunsite.unc.edu, that one which uses
afio, a Conner drive, and I have been unable to make any backup with
1.1.52. because of tons of I/O errors.
Anyone have this kind of combination?
--
Janne.Sinkkonen@helsinki.fi <http://avocado.pc.helsinki.fi/~janne/>
------------------------------
From: andrewp@itwhy.bhp.com.au (Andrew PRUSEK)
Subject: Where to find acct for 1.1.49+?
Date: Sun, 09 Oct 1994 10:06:44 +0930
Hello all
Some time ago I had the address for the ftp site that had the process
accounting patch for kernel above 1.1.18.
As you may have guessed I have lost this address and therefore am now
begging for someone to enlighten me as to where I might find this.
I have looked in the regular places but have come up empty handed.
Any pointer???
thanks
Andrew
--
Andrew PRUSEK Phone: +61 86 40 4590
BHP Information Technology Fax: +61 86 40 4720
PO Box 21 / Port Augusta Road Email: andrewp@itwhy.bhp.com.au
Whyalla SA 5600 Prefered OS: Linux
Australia Disclaimer: My opinions are my own.
------------------------------
** 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
******************************
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