Radek Dostál 4 you

List local bluetooth devices

# hcitool dev

Scan for bluetooth devices around

# hcitool scan

Bluetooth ping

# l2ping AA:BB:CC:DD:EE:FF

Browse services provided by this computer

# sdptool browse local

Browse services provided by another device

# sdptool browse --raw AA:BB:CC:DD:EE:FF

Connect /dev/rfcomm0 to another device channel 3

# rfcomm connet 0 AA:BB:CC:DD:EE:FF 3

If you ever experience following error "Parse error: syntax error, unexpected T_STRING, expecting ')' in /proto/SxM_webui/ctcs/ctcs.db on line 7", just login to mybook world via ssh, open /proto/SxM_webui/ctcs/ctcs.db and make it valid PHP script. You will probably need to escape " with \" in some file names. You may need to reboot MyBook afterwards.

Udev rule for changing selected USB configuration descriptor:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="abcd", ATTRS{idProduct}=="12*", ATTRS{bConfigurationValue}!="2", \
  ATTR{bConfigurationValue}="2"

Udev rule for creating link and setting permissions for easier access from own application:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="abcd", ATTRS{idProduct}=="12*", KERNEL=="hidraw*", \
  MODE="0666", SYMLINK+="myDeviceLink"

remember to execute

$ sudo service udev restart

Ubuntu 10.04 still ships with wmii-3.6. New extensions, which are implemented in the latest wmii, are required to run gnome-panel.

Getting Ubuntu package

I have prepared the following packages for you:

• wmii-hg_hg2602_lucid_i386.deb (367 KB)
• wmii-hg_hg2602_lucid_amd64.deb (408 KB)

If it does not fit you, please use the following script to build latest wmii from source code.

#!/bin/bash

WORKDIR="/tmp/wmii"
URL="http://dl.suckless.org/wmii/wmii+ixp-3.9b1.tbz"
FILE=wmii+ixp-3.9b1.tbz
DIR=wmii+ixp-3.9b1

# prepare working directory
rm -rf $WORKDIR
mkdir -p $WORKDIR
cd $WORKDIR

# install necessary dependencies - sudo make deb-dep miss some dependencies
sudo aptitude install build-essential debhelper libxext-dev x11proto-xext-dev \
  libx11-dev libxrandr-dev libxinerama-dev fakeroot quilt gcc make dpkg-dev \
  libixp libxft-dev mercurial txt2tags

hg clone http://hg.suckless.org/wmii

cd wmii

dpkg-buildpackage -rfakeroot -uc -us -b

You can found working package in /tmp/wmii and install it using following command

$ sudo dpkg -i wmii-hg_hg2550_i386.deb

Configure Gnome

Tweaking Gnomes Registry

Gnome's registry also needs a little bit of tweaking in order for it to play nicely with wmii. Next fire up the gconf-editor:

$ gconf-editor

And unmark the checkbox at apps>nautilus>preferences and untick show_desktop
Next go to desktop>gnome>background and untick draw_background + empty picture_filename.

Telling Gnome to use WMII as the window manager

This step is the step that was the most difficult to find. Simply run this command:

$ echo export WINDOW_MANAGER=`which wmii` >> ~/.gnomerc

This'll create a .gnomerc which will then run wmii.

Configuring WMII

cp -r /etc/X11/wmii-hg/ ~/.wmii-hg/

In order for "MOD-a" -> quit to work properly, you need to modify ~/.wmii-hg/wmiirc in the following way

1. Search for Action quit
2. Replace "wmiir xwrite /ctl quit" with "gnome-session-save --kill --silent"

Making Gnome panel look nicer

$ gnome-control-center

Click on "Appearance" and select your theme of choice - the first one (custom) works fine.

Acknowledgement

Above steps has been based on info from Ryan Kraay's page. He provides even more tips, which I did not found necessary myself.

Recently I have bought Western Digital MyBook world. I planned to use it for backups over network. SSH access can be easily enabled using MyBook web interface. Rsync version 3.0.2 was already pre-installed on it, so it was an ideal choice. Hard links are used for keeping multiple snapshots without wasting disk capacity.

I am using the following two scripts on my PC:

backupToMyBook.sh - for regular backup.

#!/bin/bash

rsync -axve 'ssh -c arcfour -m hmac-md5-96' --delete --link-dest=../root.1/ \
  / root@MyBookWorldIP:'`/DataVolume/RadekBackup/PrepareBackupRoot.sh`'

backupToMyBookResume.sh - for case backup was interrupted during copying files and it needs to be resumed.

#!/bin/bash

rsync -axve 'ssh -c arcfour -m hmac-md5-96' --delete --link-dest=../root.1/ \
  / root@MyBookWorldIP:/DataVolume/RadekBackup/root.0/

The third script is located on the MyBook in /DataVolume/RadekBackup/PrepareBackupRoot.sh

#!/bin/sh

rm -rf /DataVolume/RadekBackup/root.3
mv /DataVolume/RadekBackup/root.2 /DataVolume/RadekBackup/root.3
mv /DataVolume/RadekBackup/root.1 /DataVolume/RadekBackup/root.2
mv /DataVolume/RadekBackup/root.0 /DataVolume/RadekBackup/root.1

echo /DataVolume/RadekBackup/root.0/

Rotate all pictures based on EXIF orientation info:

jhead -autorot *

Add 1h30m to all jpegs EXIFs time info:

jhead -ta+1:30 *

Rename all pictures according to EXIF time info:

jhead -n%Y%m%d-%H%M%S *

Re-size all the jpg files in the current directory - keep aspect ratio and set maximal width/height to 1024 pixel:

mogrify -resize 1024x1024 *.jpg

Scale all jpgs in the current directory by 50%:

mogrify -resize 50% *.jpg

#!/bin/bash

git init
for dir in `find . | grep 'CVS/Entries$' | sed -e 's/CVS\/Entries//g'`
do
    for file in `cat "$dir/CVS/Entries" | grep '^/' | cut --delimiter=/ -f2`
    do
        git add $dir$file
    done
done