Subject: Re: Locating FAQ/help
From: Mike Melanson (melanson@pcisys.net)
Date: Mon May 28 2001 - 12:24:39 MDT
On Mon, 28 May 2001, Michael Tucker wrote:
> Although it may be a waste of time (because I am planning on getting YDL
> 2 this week), I was wondering if someone has the URL of a good FAQ for
> YDL/Mac-Specific Linuxes. I tried accessing the one maintained by Reid,
> but my browser (IE) didn't seem to like it (that or there is no data in
> the pages :). Specifically, I am trying to address two problems:
I don't know of any good PPC-specific FAQs off the top of my head,
but I was thinking of posting a little web diary about my adventures with
Linux for PPC. I've been learning a stunning amount. For the time being,
though, hanging out on the YDL and LinuxPPC mailing lists are doing me
well.
However, your first two questions don't really pertain to Linux on
PPC specifically, but Linux in general. Here's a good place for general
Linux topics:
http://www.linuxdoc.org
> 1) PPP doesn't work properly. I can use the PPP scripts (or ifup ppp0) to
> dial out, but once connected I am unable to ping anything
> successfully. I see the SD light (send) on my USR modem blink when I ping,
> but I nothing happens with the RD light (receive). I've played with
> different utilities to no avail.
Check your /var/log/messages file and check if there's any useful
debug text in there. Specifically, are you actually getting an IP address
from your ISP? Use the tail command to see the last few lines of a
file. Also, use -number to modify how many lines it spews out, for
example:
tail -30 /var/log/messages
will show you the last 30 lines of the messages file. And you might need
to be root to do that. There should be a bunch of lines that say what pppd
is doing and a few of them should establish a remote and local IP
address. If you don't see any lines with pppd, make sure that your pppd
script is appending the parameter 'debug' on the pppd command line. Also,
it should have the 'defaultroute' parameter as well, which tells the Linux
TCP/IP stack to send all TCP/IP packets out through the modem by default.
Also, here's the PPP HOWTO:
http://www.linuxdoc.org/HOWTO/PPP-HOWTO/index.html
> 2) I am not clear on what to do to set up basic services. Specifically,
> when I was setting up the eth0 on my 8600, I initially went through
> linuxconf. At that point I didn't know which driver to select (still
> don't), but extensive web searching revealed that I should use netconfig
> instead. I never would have guessed that on my own, and I'm not sure if
> that implies that I am also using the wrong utilities to set up my
> services (for example.... PPP?), so if there is a FAQ that addresses stuff
> like that, it would be ENORMOUSLY useful if someone could direct me to it.
Are you hooked up to another computer via ethernet so that you can
test it once you think ethernet should be working? If so, first try
bringing up the ethernet interface with a basic command line (do this as
root):
/sbin/ifconfig eth0 up 192.168.1.1
If the command doesn't talk back to you, it likely worked. Type
'/sbin/ifconfig' (doesn't have to be as root this time) and you should see
a list of your TCP/IP interfaces including lo (loopback), eth0
(ethernet) and ppp0 (if you managed to get that running and you're dialed
in). If you connected to another computer, try pinging
it. NOTE: 192.168.1.1 is just a dummy address in this example. If you're
on an actual network administered by someone else, you should find out
what address to use instead. BTW, this all assumes that eth0 got brought
up. Check your dmesg log to find out if that happened:
dmesg | grep eth0
Also, here's the Linux Networking HOWTO:
http://www.linuxdoc.org/HOWTO/Net-HOWTO/index.html
> Otherwise, I am quite pleased with the setup, although there are a few
> other things. For example, I have yet to successfully mount an HFS drive
> in Linux, so I've been unable to compile and use my own kernels. I've
> noticed some odd behavior when mounting an HFS floppy disk - namely,
> copying files to it reported success, but didn;t copy any data (and then
> caused my system to behave strangely). This was with the kernel that ships
> with CS1.2.1
Heh, another catch-22...:) I recently figured out how to mount HFS
partitions, but until I did, I would transfer a new kernel to another
computer via my ethernet LAN, reboot into MacOS, and then transfer the
kernel back using a web browser. Tedious. I don't know if the stock YDL
kernel has HFS support compiled in, but it doesn't come as a module. I
don't think I remembered to test it before I managed to upgrade. Try this:
mount -t hfs /dev/sda3 /mount_point
/mount_point, of course is wherever you want it mounted, and /dev/sda3 may
or may not be the right partition. If it doesn't recognize the hfs
filesystem, then try to compile hfs as a module (you should have the YDL
kernel source in /usr/src/linux-2.2.15/.
Let us know how it all works out.
-- -Mike Melanson
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