|
|
|
|
|
|
|
|
My system worked fine for a few months, but now
I'm facing some
problems with it. When using X, the system suddenly freezes. Neither
the keyboard nor the mouse responds. I can't telnet to my
computer--nothing works.
Log files tell nothing--just as if nothing happened--but
I have to boot my computer and hope fsck can fix everything.
This happens about once a week and I don't have the slightest idea
why. The system is Red Hat 6 out-of-the-box with no updates.
Tried another video adapter, but that didn't change anything. Hardware:
AMD-233, 64MB, ATI 3d Rage Pro, 3c509, Seagate 32.
--
Tony Söderudd, tsoderud@cc.hut.fi
It's hard to tell what the problem is. One possible reason is a bug in X;
try upgrading to the latest stable XFree86 (3.3.5 at the time I write this).
Another possibility is some kind of hardware/resource conflict, although
since you say the problem happens only once a week on average, it's not too
likely.
The last option is simply bad hardware, like an overheating CPU (bad fan?) or flaky
memory. I believe that is the most likely alternative and the freeze
is actually completely unrelated to X. See http://www.bitwizard.nl/sig11/.
--
Marc Merlin, merlin@varesearch.com
For the last couple of years, my computer has been
a small server on the Internet. Its connection is via modem.
I had no problems the first year or so. On April 16, 1999, my
/var/adm/messages file filled up with garbage. After a couple of weeks, I
determined the phone company came to the wrong residence and ``played''
with my phone lines while my modem was connected. Ever since that time, my modem
will randomly hang up without dropping carrier. Linux still thinks
it is connected to the Internet, i.e., the route, ifconfig... still
show a connection even though there isn't one. This doesn't happen every time
the modem disconnects. Sometimes this will happen a couple of times a
day; sometimes only once a month. Once it does
happen, there is no way to fix it, other than physically turning the modem
off and back on. I've tried replacing all hardware: modem, modem cable,
serial port(s), phone wiring, phone jack. I've also tried compiling
a new kernel and pppd. Nothing has helped.
What in the world is happening and how do I fix it?
--
Eric Trimmer, eric@et.trimmer.org
There is a relatively simple solution, but you may need to upgrade your
kernel and PPP package to support it, depending on the age of your actual
installation. Use the lcp-echo-interval and lcp-echo-failure options to
tell pppd to terminate when it doesn't receive a certain number of ping
request responses. pppd will then terminate and cycle the connection when
your physical layer goes down, whether or not your modem is correctly
telling Linux it has lost its link.
--
Chad Robinson, Chad.Robinson@brt.com
The instructions Software Forge Inc. provided for
installing LinuxCAD are not really applicable to OpenLinux 2.2. What is
the best way to install software in a .tar or .tar.gz file on an operating
system that uses RPM?
--
Wayde C. Gutman, wcgutman@mwpower.net
You can actually install a tar file just fine on an RPM-based system. It is,
however, better to have an RPM, since it keeps track of the files installed.
I believe you should be able to use alien to convert your tar file into an
RPM: http://kitenet.net/programs/alien/.
--
Marc Merlin, merlin@varesearch.com
The tar.gz format is somewhat similar to .ZIP under other operating systems. Usually, you'll just unpack the tar file, following instructions found in the included README or equivalent file.
Use tar tvzf filename to list the contents of a tar.gz file, and
tar xvzf filename to extract it. tar is one of the most
important UNIX commands; check the introductory UNIX guides or check info tar and man tar to get detailed information.
--
Alessandro Rubini, rubini@prosa.it
I have tried to use function request_module in my code
to load dynamic kernel modules. The request_module function itself
is not a problem, but the function kerneld_send, which is called by
request_module. Every time I try to insert (insmod) my module, which
is supposed to request the other module, I get the following error:
``helloworld.o: unresolved symbol kerneld_send''.
Why can't request_module find the
kerneld_send function? I use Red Hat 5.0, kernel 2.0.36RTL1.1.
--
Kristiina Valtanen, Kristiina.Valtanen@vtt.fi
At insmod time, the module is linked to the running kernel, using
the public symbol table exported by the kernel (shown in
/proc/ksyms).
The function request_module (defined in linux/module.h) is
actually an in-line function, and it gets expanded in-line at compile
time. However, kerneld_send is not in-line and must be located at
link time. Since kerneld_send is not exported, your module can't be
loaded. The function is not exported, because no module normally asks
for kenreld functionality. Unneeded internals are not exported.
You can export the function by hacking the file kernel/ksyms.c and
rebooting a new kernel.
--
Alessandro Rubini, rubini@prosa.it
I am trying to install Linux 6.0 on my 486. I have run into
serious problems. Red Hat Linux 6.0 does not seem to recognize my
Sony CD-ROM. Several e-mails and phone calls to Technical Support at
Red Hat have not solved my problem. The error message I keep getting is
``I could not mount your CD on device hdk''. I was asked to download
the new boot image and try installing it again, but was not successful.
I was asked to give some parameters at the boot prompt, again in vain.
The last suggestion I got from tech support is to buy a new CD-ROM.
The CD I have is Sony
Atapi CD76E. It is an IDE controller. Is there anyone who could let me
know how I can work around this problem so that I don't have to buy
another CD-ROM?
--
Srilakshmi, RSSri@aol.com
You say the installation is trying to mount the CD drive as /dev/hdk--that's the 11th drive on your system! I suspect this is not correct, and the kernel merely needs to be nudged toward the correct device. Consider first the naming conventions for IDE drives (including CD drives):
hdc=cdromThere will be something before this on the boot: line that needs to be typed in; probably linux or install. Red Hat support should be able to tell you what needs to precede the line above.
I'm using Linux and I'm wondering how I can control a TELNET session from
a shell script. In DOS, I would use a keyboard buffer, but it seems
this is not available in Linux. I would like to send characters, wait
for a special response, then send something again. How can I do that?
--
Thomas Lienhard, tl@tlienhard.com
You can open a pipe to telnet and send data to its STDIN and read
responses from STDOUT. Using the keyboard buffer makes no sense in UNIX,
as no process accesses the keyboard; they just read from standard input.
If using the telnet command doesn't work, you can try netcat
(available within Debian). Also, note that most languages support TCP
connections; expect, for example, is a Tcl extension designed to
perform exactly the task you need to accomplish: sending input and
expecting responses.
--
Alessandro Rubini, rubini@prosa.it
What you are looking for is expect. This is exactly what it was
designed for. man expect on any Linux box with it installed will give
you the information you need, or you can download it from
http://expect.nist.gov/ if you don't already have it.
Also, O'Reilly & Associates publishes a very good book by Don Libes called
--
Mark Bishop, mark@bish.net
I'm using the KDE window manager, KDM and tcsh. My distribution is
Mandrake 6.0. In my home
directory, I'm keeping .cshrc and .login for my own initializations,
but the problem is that after logging to an X session and invoking any
terminal (xterm or kvt), the .login is not executed at all (.cshrc executes
fine). Both files (.cshrc and .login) have execute permission and properly
execute in a normal (batch) session. Where and how do I need to tell X
(and/or KDM) to execute my .login after start-up?
--
Valentine Kouznetsov, vkuznet@fnal.gov
When you log in to the computer using a display manager, no login shell
is started, so no .login or .bashlogin is sourced. The display manager
handles the authentication and runs your display configuration without
passing through a shell. You need to perform all of your
initialization from within .cshrc. That's one of the reasons I don't
run a display manager at all.
--
Alessandro Rubini, rubini@prosa.it
Is it possible to run a Linux firewall using IP mask connecting
a small network to the Net using a cable modem?
--
Tom, tlross@home.com
Yes, it is the easiest firewall configuration. Just run
ipfwadm -a accept -mor an equivalent ipchains command.