Cyconet Blog » selfnote

[selfnote] Find the DUN Channel of your bluetooth device

cyco — Fri, 23 Apr 2010 07:59:06 +0000

In the last days, I replaced my Nokia E90 with a Nokia N97 mini. As I’m using my mobile from time to time to hook up to the internet when traveling, I thought I just need to replace the MAC in my /etc/bluetooth/rfcomm.conf and that’s it. As always … Murphy striked back. After debugging for hours I realized the DUN channel seems depending on the model.

You can discover your DUN channel something like:

# hcitool scan
Scanning …
3C:F7:2A:1A:4D:2A Cycophone
# sdptool browse 3C:F7:2A:1A:4D:2A | \
grep -9 “Service Name: Dial-Up Networking” | \
tail -10 | grep Channel
Channel: 22

So your /etc/bluetooth/rfcomm.conf should now look like:

…
rfcomm0 {
bind yes;
device 3C:F7:2A:1A:4D:2A;
channel 22;
comment “Cycophone”;
}
…

[selfnote] Change CD-image while (HVM) domU is running

cyco — Sun, 29 Nov 2009 15:23:15 +0000

xm list | grep <VMName>
xm block-list <VMName_Number>
xm block-detach <VMName_Number> <VMName_Vdev> -f
xm block-attach <VMName_Number> file:///iso/disk.iso \
hdc:cdrom r

dkms rocks … or … how to get the Intel 82576 GBit NIC running on Lenny

cyco — Wed, 18 Nov 2009 20:07:18 +0000

We ordered a couple of the new HP DL160 G6, cause they can be equipped with a lot of RAM. Unfortunately it’s always the same with HP and the bandnew ProLiant 100 series … the driver for the NICs is missing/too old in the latest stable debian release. The DL160 G6 is shipped with a Intel 82576 GBit NIC, which isn’t recognized by Lenny, see also #522922.
I installed the system with another NIC installed (not really, but this is a way it works :) and wanted to get free the PCI-X slot again. So I did backport dkms and downloaded the latest igb driver. A short look into /usr/share/doc/dkms/HOWTO.Debian did advice me the way to create the DKMS driver package. Just after a couple of minutes I did roll out the igb-dkms_2.0.6_all.deb to the target maschine(s).
On the target systems I just installed dkms, the DKMS package and appropriate linux-headers and … sim, salabim … there was the interfaces. :)

[selfnote] Cloning/Backing up NTFS systems

cyco — Fri, 18 Sep 2009 21:27:34 +0000

For some reasons, you may need to clone/backup NTFS based systems. Lets say your NTFS system is located at /dev/sda1 and /dev/sdb1 is a spare partition where you can store your image.

At first you need to boot a live system to take an image:

mount /dev/sdb1 /mnt/sdb1
dd bs=512 count=1 if=/dev/sda of=/mnt/sdb1/xp_vbox.mbr
ntfsclone -s -o – /dev/sda1 | bzip2 -9 -c > \
/mnt/sdb1/xp_vbox.img.bz2

To restore the image you just need:

mount /dev/sdb1 /mnt/sdb1
dd count=1 bs=446 if=/mnt/sdb1/xp_vbox.mbr of=/dev/sda
cat /mnt/sdb1/xp_vbox.img.bz2 | bunzip2 -c | \
ntfsclone -r -O /dev/sda1 -

P.S. If you are elective in germany, have a look at this!

[security] wordpress 2.5.1 which fixes CVE-2008-1930

cyco — Fri, 25 Apr 2008 18:15:26 +0000

Cause the subject, I did build a new package which can be installed on etch, lenny and of course sid. You can fetch it from http://ftp.cyconet.org/debian/archive/bpo/wordpress/2.5.1-1~bpo40+1/ or get via

deb http://ftp.cyconet.org/debian etch-backports main non-free contrib

Selfnote: Dump the wordpress user into separate domU

[selfnote] How to handle multiple domains with one apache vhost in a smart way

cyco — Thu, 20 Mar 2008 14:02:57 +0000

Today a customer asked for hosting several domains with different content on one apache virtual host. The little tricky part was, that the sites should not be accessed by subdirs like http://domain20.org/subdir20/ and http://domain21.org/subdir21/ which can be done with a little script which parses the $_SERVER['HTTP_HOST']. So mod_rewrite is an option.
To make it user accessable, we use .htaccess. This requires “AllowOverride +FileInfo” to be set for the DocumentRoot in the vhost config. The .htaccess in DocumentRoot could look something like:

RewriteEngine On
RewriteBase /
RewriteCond %{HTTP_HOST} domain10.org$ [OR]
RewriteCond %{HTTP_HOST} domain11.org$
RewriteCond %{REQUEST_FILENAME} !dir1/
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule (.*) dir1/$1 [L]
RewriteCond %{HTTP_HOST} domain20.org$ [OR]
RewriteCond %{HTTP_HOST} domain21.org$
RewriteCond %{REQUEST_FILENAME} !dir2/
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule (.*) dir2/$1 [L]