Linux-Misc Digest #636, Volume #27 Wed, 18 Apr 01 03:13:01 EDT
Contents:
com ports ("Sudhakar R.")
Re: Problem with reading CD-ROM ("Moshe Samuel")
Re: Booting Linux on a robot (bob)
Re: A Linux emulator for Linux, does this exist? (Jonadab the Unsightly One)
Re: Aliases in .bashrc and .tcshrc (bob)
Re: Booting Linux on a robot (Joachim Feise)
Re: Could Linux be used in this factory environment ? (Franek)
Re: Could Linux be used in this factory environment ? (Franek)
Re: Booting Linux on a robot (David)
Re: Could Linux be used in this factory environment ? (Brent R)
Alcatel SpeedTouch HOME: Program for another ISP? (Dan Smith)
Re: Diskless boot from floppy help (Dan Smith)
double boot win2k-ntfs & linux (ThanhVu N)
NYC LOCAL: Wednesday 18 April 2001 The Internet Society New York: YouthCaN
([EMAIL PROTECTED])
Re: Could Linux be used in this factory environment ? (Brent R)
Re: Booting Linux on a robot ("Niels Sterrenburg")
----------------------------------------------------------------------------
From: "Sudhakar R." <[EMAIL PROTECTED]>
Subject: com ports
Date: Wed, 18 Apr 2001 00:46:40 -0400
all of a sudden i'm unable to get my joystick to work under windows. after
trying to communicate with my organiser over the com ports i found that
there was no response though windows was not complaining about any
hardware problem.
i was wondering if there is some way that i can check whether my com ports
are working fine under linux. can someone pls help.
thanx in advance.
-sud
------------------------------
From: "Moshe Samuel" <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.help,comp.os.linux.questions
Subject: Re: Problem with reading CD-ROM
Date: Wed, 18 Apr 2001 00:46:34 -0500
Christos,
What output do you get from:
% ls -l /dev/cdrom
and from:
% ls -l /dev/hdb
?
MoSam
Christos <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> Moshe,
>
> Here's what my /etc/fstab looks like:
>
> % more /etc/fstab
> /dev/hda7 / ext2 defaults 1
1
> /dev/hda5 /boot ext2 defaults 1
2
> /dev/cdrom /mnt/cdrom iso9660 noauto,owner,ro 0
0
> /dev/hda6 swap swap defaults 0
0
> /dev/fd0 /mnt/floppy ext2 exec,dev,suid,rw,noauto,owner 0 0
> /dev/hda1 /mnt/msdos vfat defaults 0
0
> none /proc proc defaults 0
0
> none /dev/pts devpts gid=5,mode=620 0
0
>
> Does this help any?
>
> Thanks,
> Christos
>
>
> Moshe Samuel wrote:
>
> > What does your /etc/fstab file look like?
> > MoSam
> >
> > Christos Siopis <[EMAIL PROTECTED]> wrote in message
> > news:[EMAIL PROTECTED]...
> > > Greetings,
> > >
> > > I am having a problem with my CD-ROM drive: it does not read CD-ROMs
any
>
------------------------------
From: bob <[EMAIL PROTECTED]>
Crossposted-To:
alt.linux,alt.os.linux,alt.os.linux.mandrake,comp.os.linux.development.system
Subject: Re: Booting Linux on a robot
Date: Wed, 18 Apr 2001 00:32:00 -0500
Jasmin Letendre wrote:
>
> I'm currently developping a six legged robots. The robot has an on-board
> conmputer and we want it to boot from a flash disk. We use Linux
> Mandrake. After long hour of trial and error, we managed to boot from
> the flash disk and have the prompt for a logging name.
>
> The problem is that any user name we enter (even root!) gives a "login
> invalid" without even asking for a password. And if we press
> Ctrl+Alt+Delete, it says "You don't exist. Go away!"
>
> Does anybody has an idea about this problem?
>
> Thanks.
>
> Jasmin
Congratulations. The good news is your robot has developed a high
degree of intelligence. The bad news is that it has decided it doesn't
like you. I have no solution to your problem, but having achieved this
problem represents glorious success. Good luck!
- Bob
------------------------------
From: [EMAIL PROTECTED] (Jonadab the Unsightly One)
Crossposted-To: comp.os.linux.development.system,comp.os.linux.hardware
Subject: Re: A Linux emulator for Linux, does this exist?
Date: Wed, 18 Apr 2001 05:40:06 GMT
[EMAIL PROTECTED] (Grant Edwards) wrote:
> Replacing two PCs with a 390 may not be feasible. It would be
> interesting to see an analysis of where the break-even point
> is. 50 PC's? 1000 PD's?
How much does a 390 cost?
The OP was hoping to escape the cost of a second PC,
so clearly this solution won't fit his budget.
- jonadab
------------------------------
From: bob <[EMAIL PROTECTED]>
Crossposted-To: poster
Subject: Re: Aliases in .bashrc and .tcshrc
Date: Wed, 18 Apr 2001 00:43:37 -0500
Not sure why this particular error message comes up, but what worked for
me is:
alias fnd='find . -name'
In bash, alias is not a little script, instead it replaces the thing
before the = sign with the material quoted after the equal sign, so
nothing needs to be done to get the rest of the paramaters from "fnd
<whatever>" into the produced command. And the in the GNU find, -print
is on by default.
HTH.
- Bob
Alex Vinokur wrote:
>
> -----------------------------------------------
> #uname -a
> Linux gcc 2.2.17-21mdk #1 Thu Oct 5 13:16:08 CEST 2000 i586 unknown
> -----------------------------------------------
>
> I defined the following alias in .tcshrc
> alias fnd 'find . -name \!* -print'
> It works, for instance :
> fnd abcd.
>
> I tried to define following aliases in .bashrc
> alias fnd1='find . -name !* -print'
> alias fnd2='find . -name \!* -print'
>
> It doen't work :
> [root@gcc /]# fnd1 abc
> find: paths must precede expression
> Usage: find [path...] [expression]
>
> [root@gcc /]# fnd2 abc
> find: paths must precede expression
> Usage: find [path...] [expression]
>
> What is wrong?
> How to define in .bashrc alias fnd identical the same alias in .tcshrc?
>
> Thanks in advance,
>
> ============================
> Alex Vinokur
> mailto:[EMAIL PROTECTED]
> http://go.to/alexv_math
> ============================
------------------------------
From: Joachim Feise <[EMAIL PROTECTED]>
Crossposted-To:
alt.linux,alt.os.linux,alt.os.linux.mandrake,comp.os.linux.development.system
Subject: Re: Booting Linux on a robot
Date: Tue, 17 Apr 2001 22:59:22 -0700
Reply-To: [EMAIL PROTECTED]
Jasmin Letendre wrote:
>
> The problem is that any user name we enter (even root!) gives a "login
> invalid" without even asking for a password. And if we press
> Ctrl+Alt+Delete, it says "You don't exist. Go away!"
>
> Does anybody has an idea about this problem?
You are probably missing a couple of files from the /etc directory.
-Joe
------------------------------
From: Franek <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Could Linux be used in this factory environment ?
Date: Wed, 18 Apr 2001 06:18:32 GMT
Chad Everett wrote:
> Man..that ladder logic is the wierdest way to program I've ever seen.
Not to an electrician, though. Your thinking inside the box. Consider historical
circumstances, and realize that factories exist for a long time, and they were not
quite
un-automated before the advent of PLCs. Computerization and automation aren't one and
the
same thing.
------------------------------
From: Franek <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Could Linux be used in this factory environment ?
Date: Wed, 18 Apr 2001 06:19:28 GMT
Hartmann Schaffer wrote:
> maybe the problem was with the application, but didn't it take nt down with
> it?
I wasn't there at the moment <g>.
------------------------------
From: David <[EMAIL PROTECTED]>
Crossposted-To:
alt.linux,alt.os.linux,alt.os.linux.mandrake,comp.os.linux.development.system
Subject: Re: Booting Linux on a robot
Date: Wed, 18 Apr 2001 06:30:07 GMT
Joachim Feise wrote:
>
>
> You are probably missing a couple of files from the /etc directory.
>
> -Joe
/etc/passwd /etc/group /etc/login.defs ???
Just a thought.
--
Confucius say: He who play in root, eventually kill tree.
Registered with the Linux Counter. http://counter.li.org
ID # 123538
Completed more W/U's than 99.166% of seti users. +/- 0.01%
------------------------------
From: Brent R <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Could Linux be used in this factory environment ?
Date: Wed, 18 Apr 2001 06:31:25 GMT
Erik Funkenbusch wrote:
>
> "Jean-David Beyer" <[EMAIL PROTECTED]> wrote in message
> > I thought that a few years ago, the U.S.Navy tried a computer
> > controlled battleship, and the computers ran Windows NT (probably 3.51
> > in those days), and it crashed so bad the ship had to be towed into
> > port. (I may not have the facts exactly correct, but it was pretty
> > much like this.) Maybe the computers were not exactly your
> > bargain-basement PCs, but the software must have been. If the U.S.Navy
> > is dumb enough to use Microsoftware in a battle-critical system, why
> > would not some private industry be just as dumb?
>
> Why let the facts get in the way of a good dis, right? Your lack of
> knowledge on the issue doesn't seem to prevent you from jumping to
> conclusions.
>
> The facts in the matter are a) that it wasn't a battleship, and b) that they
> were running a beta version of the control software which did not validate
> entry fields. As such, when an operator entered a 0 into a field, it was
> stored in the database, causing all subsystems that depended on that
> information to fail with a divide by zero exception.
>
> The application could not be restarted because every time they restarted it,
> it would re-read the data values and crash again, thus the ship was dead in
> the water. Further, the ship wasn't towed in, the ship had alternate
> propulsion mechanisms onboard because it was an experimental project running
> beta software.
>
> The Navy and the canadian company that wrote the software stated that the
> problem was not related to NT in any way. In fact, the canadian contractor
> laid the blame on the Navy for not installing their validated version before
> the incident, which would have prevented the problem from ever occuring.
>
> The navy, however, believed that they should shake out the vessel and see
> where the potential failures might be so that in real emergency situations,
> they would know how to respond.
Still, I think their point was that a single application brought the
entire show down... a situation that's critical when it really matters
(which admittedly it usually doesn't).
I've been an MS defender in here... still I would never use NT to do
something like that... that's just not what it's made for. UNIX is more
apptly suited in that role.
--
- Brent
http://rotten168.home.att.net
------------------------------
From: Dan Smith <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.hardware,comp.os.linux.networking
Subject: Alcatel SpeedTouch HOME: Program for another ISP?
Date: 17 Apr 2001 18:25:28 -0400
I have 2 Alcatel SpeedTouch Home DSL modems. One is configured for my
ISP, one is not. They tell me that a modem has to be config'd for
their service, and that I can't use just any modem. Does anyone know
how I can suck the configuration out of the good one and stuff it into
the other one?
This would really help me out. Thanks!
--Dan
------------------------------
From: Dan Smith <[EMAIL PROTECTED]>
Subject: Re: Diskless boot from floppy help
Date: 17 Apr 2001 16:20:43 -0400
Well, I was using a separate disk as the root. I got the libraries
for init, so shouldn't I get past that part that says "no init found"?
--Dan
------------------------------
From: ThanhVu N <[EMAIL PROTECTED]>
Subject: double boot win2k-ntfs & linux
Date: Wed, 18 Apr 2001 02:30:33 -0400
hi, can you point me to the website that has instruction for this - thanks
------------------------------
From: [EMAIL PROTECTED]
Crossposted-To: comp.os.linux.advocacy,comp.unix.bsd.freebsd.misc
Subject: NYC LOCAL: Wednesday 18 April 2001 The Internet Society New York: YouthCaN
Date: 18 Apr 2001 02:29:15 -0400
<blockquote
edit-level="light">
ISOC-NY, Computer Advocacy @ NYU, & I*EARN present
YouthCaN 2001 -- a panel presentation
Wednesday, April 18, 2001
7:30 pm
New York University
Student Events Center, Room 406
5 Washington Place (at Mercer)
Free and Open to the Public
Refreshments Served
YouthCaN 2001
[EMAIL PROTECTED]
http://www.nyu.edu/projects/youthcan
YouthCaN is a youth run organization that uses technology to inspire,
connect and educate people worldwide about environmental issues.
Through a network of conferences, activities and events we unite
environmentally active youth to exchange ideas about the environment
and empower others to make a difference in their own communities.
YouthCaN is facilitated by adult volunteers, graduate students, teachers,
I*EARN personnel, and museum staff.
PRESENTERS:
Millard Clements PhD
New York University, School of Education
Environmental Conservation Education
[EMAIL PROTECTED]
http://www.nyu.edu/projects/youthcan/
Along with Jim Van Tassell, Millard was an early user
of communications technologies with school-age students.
Together they initiated what became YouthCaN.
=======
James L. Van Tassell PhD
[EMAIL PROTECTED]
Ichthyology, Biology Department
Hofstra University
Home page: http://home.att.net/~jvantassell
Jim Van Tassell has been using communications technologies
for about 20 years. Before he completed his Phd in Ichthyology
he was a science teacher in the H. Frank Carey High School.
Years ago he taught his students to use Fido Nets. Over the years
his students have made vital contributions to YouthCaN.
He is a genuine pioneer in the use of communications technologies.
=======
Ed Gragert
iEARN-USA
[EMAIL PROTECTED]
http://www.iearn.org
Ed Gragert has worked for many generations of YouthCaN projects and
activities. Ed is an international leader in the uses of changing
communications technologies with school-age students. Ed has published an
article in the January/February 1999 issue of the ISOC publication
"OnTheInternet", titled: "The Internet Potential for an Education of
HOPE."
iEARN is a co-sponsor of YouthCaN. iEARN is a vital educational community
of teachers and students in approximately 70 nations around the globe,
connecting Youth and making a difference in the world. The vision and
purpose of iEARN, the International Education and Resource Network, is to
enable young people to undertake projects designed to make a meaningful
contribution to the health and welfare of the planet and its people.
=======
Jay Holmes
[EMAIL PROTECTED]
Department of Education
American Museum of Natural History
http://www.amnh.org
Jay Holmes has worked from the beginning of YouthCaN.
He is skillful with changing communications technologies. He has
extraordinary gifts for working creatively with school-age students and
a deep knowledge and awareness of environmental issues.
======
Jon Turbin
DeWitt Clinton High School
The Bronx, New York
[EMAIL PROTECTED]
http://www.nyu.edu/projects/youthcan
Jon Turbin has had students involved with YouthCaN in recent years. He has
an Ed. D from Columbia University Teachers College in the field of
Foundations of Education. He has spent his whole life as a passionate
political activist for social justice and human rights, envisioning the
possibilities for educating and organizing for a humane world for each and
all. Jon was an early educator user of the computer and telecommunications
and has won various awards from NYCENET (New York City Education Network),
Impact II (a national teacher advocacy agency of the Board of Education),
and was selected as computer teacher of the year by James Monroe High
School and the former Bronx Superintendent Joseph De Jesus. He feels that
having his students participate with IEARN and YouthCan in their important
environmental work is as one way to make a difference, especially in the
youth, the world, and for the future in these trying times.
======
Tiffany Eng
La Guardia High School
[EMAIL PROTECTED]
(718) 271-1151
Tiffany has just returned from Athens, Greece. She made a YouthCaN
presentation there to an International Youth conference.
==========
Wileyda Cardona
High School for Environmental Studies
[EMAIL PROTECTED]
Wileyda attended an iEARN conference in Beijing last July.
She, along with other YouthCaN students, made
presentations dealing with YouthCaN activities.
=====================
YouthCaN: Some History
YouthCaN, Youth Communicating and Networking, is a telecommunications
project, a community of students, adult mentors, and annual meetings that
attract more than one thousand students, teachers and parents each year to
project, a community of students, adult mentors, and annual meetings that
attract more than one thousand students, teachers and parents each year to
the American Museum of Natural History. YouthCaN is in its tenth year.
YouthCaN began some years ago when New York University students in the New
York University Environmental Conservation Education program initiated
small demonstrations of telecommunications projects at The United Nations.
An early project had a teacher and seven elementary school students
demonstrate telecommunications projects connecting a school in Queens and
a school in Florida. Students in Queens and Florida on a particular day in
the Fall and in the Spring took a walk in the school neighborhood. They
took notes on the weather, temperature, birds, plants, animals, trees and
other forms of `life` that they saw. The schools reported to one another
about this life in their own community. There were online questions
and discussion of what life was like in the two places.
For a number of years YouthCaN activities were organized in association
with The United Nations Environment Programme youth events. At one
such event the name YouthCaN was coined. That year we had 350 students
who were involved in telecommunications and about 700 students who
attended a parallel event coordinated with YouthCaN. There were several
workshops, demonstrations and plenary events including video
phone conversations with students in other nations of the world.
YouthCaN events are now planned, organized and administered by elementary
and high school students with support from university students, American
Museum of Natural History staff, I*EARN, the H. Frank Carey High School
Ecology Council and a number of New York City teachers.
It is a project in "kids teaching kids" about technology and the
environment. Workshops deal with a range of environmental issues such as
endangered species, recycling, pond ecology, air pollution, toxic waste
and restoration projects. Computer workshops include developing Home
Pages, e-mail, exploring WWW and developing cooperative projects with
schools and organizations in the New York area and to some degree around
the world. We have had video phone and computer video communications with
students in Argentina, Australia, Spain, China, Canada, India and Africa.
YouthCaN has lived through many changes in technology. We know
something of FIDO Nets, Luma Phones, News groups, gophers, the web,
video conferencing and we will deal with the changing communications
technologies of the world of today.
Many schools in the New York area have computers, some have modems but
many schools do not have teachers with skills in computer
telecommunications. Our YouthCaN workshops and year long activities are
intended to facilitate development of computer skills and environmental
awareness in school communities of the greater New York area.
Some schools are actively involved and provide leadership to YouthCaN
activities; many schools participate in our annual conference of workshops
and demonstrations of telecommunications and the environment.
Algunos de los temas ambientales
y sociales que se exploraran en la conferencia son:
Contaminacin del aire.
Estudiantes que estan participando en la
Contaminacin del aire.
Estudiantes que estan participando en la
toma de decisiones ambientales a nivel poltico.
De donde proviene el agua que
tomamos?
Calentamiento de la tierra Parques Nacionales
Aves en peligro de extincin.
Mano de obra juvenil como su vida diaria afecta el medio
ambient.
Although this is a Kids teaching Kids project, there are many
opportunities for adult mentors with skills in technology, knowledge of
environmental issues, and the ability work with young people in
cooperative activities.
=======================================================
A, E, C, B, D, F and Q Trains to West Fourth Street
N, R Trains to Eighth Street (uptown side only due to subway work)
6 Train to Astor Place
For more extensive travel information see:
Maps to NYU: http://www.nyu.edu/maps.nyu/
The space is wheelchair accessible.
http://www.isoc-ny.org
</blockquote>
Distributed poC TINC:
Jay Sulzberger <[EMAIL PROTECTED]>
Corresponding Secretary LXNY
LXNY is New York's Free Computing Organization.
http://www.lxny.org
------------------------------
From: Brent R <[EMAIL PROTECTED]>
Crossposted-To: comp.os.linux.advocacy,comp.os.linux.hardware
Subject: Re: Could Linux be used in this factory environment ?
Date: Wed, 18 Apr 2001 06:46:56 GMT
Franek wrote:
>
> Charles Lyttle wrote:
> > However there are a number of manufacturers who make PC equals for the
> > factory floor. They are much lower cost than traditional factory
> > hardware, especially HP or Sun systems. These systems cost lots more
> > than CompUSA trash, but still are cost effective, *IF* they have a good
> > OS loaded. Linux does have competitors in this market, QNX being one.
> > But the cost of a single BSOD is high enough to keep Windows out.
> er... I've done some work on the "factory floor" and I've used different operating
> systems. First (I'll probably be crucified now) linux crashes just as well as NT,
> especially with some of the crap that's out there (of course it doesn't show blue on
> screen <g>, maybe that makes it preferable.) Second, NT is used an *awful* lot in the
> factory environment, and again, it's not that bad, no Sir, not at all. Lastly,
>whatever
> application you're running that *must* not abend, you won't run either on NT or
>linux, or
> anything else of the kind. For critical real-time control none of these will do. QNX
>will
> do, as will some specialized systems like DCSs or PLCs. General-purpose boxes
>normally run
> user interfaces, data collection, recipe loading, this kind of things, not the RT
>control.
> This stuff can be rebooted relatively harmlessly.
>
> The problems with NT have rather something to do with:
> - cost of licensing and idiotic conditions with artificial limitations
> - goddamned size of it (linux can be chopped up and configured *exactly* for that
>task you
> need)
> - related to the previous: a potentially higher cost of hardware--sometimes it's
> important.
>
> > --
> > Russ Lyttle
> > "World Domination through Penguin Power"
> > The Universal Automotive Testset Project at
> > <http://home.earthlink.net/~lyttlec>
Hmmm... if you read my other posts and you'll see that I am in no way a
MS-basher... usually I'm bashing some of the Linux kooks in here... but
I have never had Linux even come close to crashing. I love pressing the
CAPS key and watch the light actually go on and off without failure
(something I could not do in in Windows98). The problems I've had with
Linux have all been related to X, the GUI locks up and I press
CTL-ALT-BCKSPCE and take down the GUI. So needless to say the really
important stuff in Linux I do on an alternate text-login.
I've had problems with NT, not nearly as bad as Windows 98 but with more
problems then Linux. I personally can't tell if it's due to bad
administration or what... it also has to do with a misbehaving app
locking up the system (and the three fingered salute doesn't bring up
the NT process screen right away). NT is also a huge resource hog...
Linux is more compact with comparable (probably better) stability and
endurance.
I would suggest that the only reason why NT is making inroads is that
company's are making apps for it... and phasing out UNIX. Look, NT is a
proprietary system just like the commercial UNICES that these companies
used beforehand (I'm assuming), but those products had competitors while
MS has none.
I've never heard of QNX (please divulge). I would wonder if some of
these companies use IBM mainframes? I would probably bypass PC's
altogether and go with a WS or mainframe. Let's face it... PC's are fast
but they're pieces of junk. No one makes a PC that's designed to put up
with the punishment that would be dealt to it on a factory floor. I've
used an IBM mainframe (ES/9000, VSE/ESA) for about 1.5 years now, and
I've seen how much more robust they are and how much PC's suck.
--
- Brent
http://rotten168.home.att.net
------------------------------
From: "Niels Sterrenburg" <[EMAIL PROTECTED]>
Crossposted-To:
alt.linux,alt.os.linux,alt.os.linux.mandrake,comp.os.linux.development.system
Subject: Re: Booting Linux on a robot
Date: Wed, 18 Apr 2001 09:04:00 +0200
Try to boot in single user mode, checkout the lilo options how or take a
look on www.oxide.nl/phpnuke there is a story how to boot in single user
mode if you "forgot" you're password
good luck
"Jasmin Letendre" <[EMAIL PROTECTED]> wrote in message
news:[EMAIL PROTECTED]...
> I'm currently developping a six legged robots. The robot has an on-board
> conmputer and we want it to boot from a flash disk. We use Linux
> Mandrake. After long hour of trial and error, we managed to boot from
> the flash disk and have the prompt for a logging name.
>
> The problem is that any user name we enter (even root!) gives a "login
> invalid" without even asking for a password. And if we press
> Ctrl+Alt+Delete, it says "You don't exist. Go away!"
>
> Does anybody has an idea about this problem?
>
> Thanks.
>
> Jasmin
>
>
------------------------------
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End of Linux-Misc Digest
******************************
