Cron Jobs with Mac OSX

Veröffentlicht am 28. Mai 2014 von Julian Tatsch

Although launchd is the preferred method of scheduling jobs with Mac OSX, the good old cron job is easier to configure and still works:

sudo touch /etc/crontab
crontab -e

1 2	sudo touch /etc/crontab crontab -e

Press i to go into vim’s insert mode.
Add a shebang if you want to run the jobs with you favorite shell:
#!/bin/zsh
enter your cron job e.g.
0 0 * * * brew update && brew upgrade
where 0 0 * * * stands for minute, hour, day, month, weekday
Press esc to exit vim’s insert mode
type ZZ ( in capital letters )
Verify by using

crontab -l

1	crontab -l

If a cron job fails, you will get a system mail.

Mac OSX System Mail

Veröffentlicht am 28. Mai 2014 von Julian Tatsch

Antworten

If your beloved terminal window greets you with „You have mail.“ you surely want to read it.

mail

mail

In mail just hit enter to read the message, type „delete 1“ to delete the first message or type „quit“ to quit.

UART on Pandaboard

Veröffentlicht am 27. Mai 2014 von Julian Tatsch

Antworten

List your users group with:

groups ${USER}

1	groups ${USER}

Add the user to the dialout group if necessary, to fix permission issues:

sudo adduser phoenix dialout

1	sudo adduser phoenix dialout

Now you can access all your uart devices:

ls /dev/tty*

1	ls /dev/tty*

for example UART4 on expansion connector A:

miniterm.py /dev/ttyO3

1	miniterm.py /dev/ttyO3

Connect to Timecapsule Share with Windows

Veröffentlicht am 27. Mai 2014 von Julian Tatsch

Antworten

Ever wanted to get some files from your timecapsule with a windows computer? You were asked for username and password and wondered what the username might be? Sure you can install Apples Airport Utility and all that stuff, or you can just try „admin“ as username and your device password.

I2C on Pandaboard

Veröffentlicht am 24. Mai 2014 von Julian Tatsch

Antworten

sudo apt-get install i2c-tools
sudo modprobe i2c-dev
sudo i2cdetect -y -r 1

sudo apt-get install i2c-tools

sudo modprobe i2c-dev

sudo i2cdetect -y -r 1

To load the kernel module automatically at boot:

sudo nano /etc/modules

1	sudo nano /etc/modules

add i2c-dev

Finally add your user to the i2c group to fix permission problems:

sudo adduser phoenix i2c

1	sudo adduser phoenix i2c

FritzBox zu Mitternacht neu starten

Bild

Antworten

Wer wie ich unter Verbindungsproblemen seiner FritzBox und UMTS leidet, kann versuchen sie jede Nacht neu zu starten. Folgenden Abschnitt einfach per nvi in die debug.cfg einfügen:

nvi /var/flash/debug.cfg

while true ; do
  if [ \\\$(date +%H) -eq 0 ] ; then
    reboot
  fi
  sleep 3550
done

while true ; do

if [ \\\$(date +%H) -eq 0 ] ; then

reboot

sleep 3550

done

Neuer Tag, neues Glück!

Dual Boot Ubuntu 14.04 LTS on Macbook Pro with Filevault 2

Veröffentlicht am 16. Mai 2014 von Julian Tatsch

Although, I prefer working on Mac OSX or using a virtual machine for all my Linux needs, sometimes that just won’t cut it. Especially when working with ROS, a native Ubuntu can help.

Shrink some partition to make space in Mac Disk Utility
Download refind 0.8.1 and unzip
Install refind into the Recovery Partition

cd refind-bin-0.8.1
install.sh --esp --alldrivers

1 2	cd refind-bin-0.8.1 install.sh --esp --alldrivers

Mount the EFI partition and edit refind.conf. Uncomment the line with dont_scan_volumes but leave the parameters empty, otherwise refind wont find your original OSX boot Partition:

diskutil mount EFI
sudo nano /Volumes/EFI/EFI/refind/refind.conf

1 2	diskutil mount EFI sudo nano /Volumes/EFI/EFI/refind/refind.conf

If something doesn’t work, don’t worry, you can still boot OSX by holding the option key at startup.

Now follow these instructions to create a bootable Ubuntu USB Stick. Load it with the refind bootloader and select „Try Ubuntu“. Open a terminal and start the installation without boot-loader:

ubiquity -b

1	ubiquity -b

In the installer choose installation type „Something else“, select the free space created at step one, format as ext4 and mount at /.

Now you should have a working dual boot configuration.

Write Linaro Image to SD Card with Mac

Veröffentlicht am 13. Mai 2014 von Julian Tatsch

Antworten

Download the Linaro image from: here and unpack it.
Then find the disk number of your sd card, unmount and flash it:

diskutil list
diskutil unmountDisk /dev/disk4
sudo dd if=panda-raring_developer_20130922-471.img of=/dev/rdisk4 bs=1m

diskutil list

diskutil unmountDisk /dev/disk4

sudo dd if=panda-raring_developer_20130922-471.img of=/dev/rdisk4 bs=1m

Fhem auf Radxa Rock installieren

Veröffentlicht am 5. Mai 2014 von Julian Tatsch

Antworten

sudo apt-get update && sudo apt-get upgrade
sudo apt-get install libwww-perl libxml-simple-perl libjson-perl libtext-csv-perl liblist-moreutils-perl libdevice-serialport-perl libdata-dump-perl libsoap-lite-perl libxml-parser-lite-perl linnet-telnet-perl ibio-socket-multicast-perl -y
sudo wget http://fhem.de/fhem-5.7.deb && sudo dpkg -i fhem-5.7.deb
sudo apt-get -f install

sudo apt-get update && sudo apt-get upgrade

sudo apt-get install libwww-perl libxml-simple-perl libjson-perl libtext-csv-perl liblist-moreutils-perl libdevice-serialport-perl libdata-dump-perl libsoap-lite-perl libxml-parser-lite-perl linnet-telnet-perl ibio-socket-multicast-perl -y

sudo wget http://fhem.de/fhem-5.7.deb && sudo dpkg -i fhem-5.7.deb

sudo apt-get -f install

Der Fhem Server ist nun zum Beispiel erreichbar unter:
http://radxa:8083/fhem

Gleich mal ein:

notice confirm update-20130127-001
update
shutdown restart

notice confirm update-20130127-001

update

shutdown restart

und schon ist man auf dem neuesten Stand und kann die Geschwindigkeit des Rock voll auskosten.

Jetzt noch ein altes Backup importieren:

invoke-rc.d fhem stop
sudo tar -xvzf ~/FHEM-20140609_060028.tar.gz -C /opt/fhem/
invoke-rc.d fhem start

invoke-rc.d fhem stop

sudo tar -xvzf ~/FHEM-20140609_060028.tar.gz -C /opt/fhem/

invoke-rc.d fhem start

Install ROS Indigo Igloo on Radxa Rock

Veröffentlicht am 3. Mai 2014 von Julian Tatsch

Antworten

Assuming you followed my tutorial for configuring your Radxa Rock, you can easily install ROS Indigo on it by:

sudo update-locale LANG=C LANGUAGE=C LC_ALL=C LC_MESSAGES=POSIX
sudo sh -c 'echo &quot;deb http://packages.namniart.com/repos/ros trusty main&quot; &gt; /etc/apt/sources.list.d/ros-latest.list'
wget http://packages.namniart.com/repos/namniart.key -O - | sudo apt-key add -
sudo apt-get update &amp;&amp; sudo apt-get install build-essential ros-indigo-ros-base ros-indigo-common-msgs ros-indigo-tf ros-indigo-tf2 ros-indigo-tf2-ros
sudo rosdep init &amp;&amp; rosdep update

sudo update-locale LANG=C LANGUAGE=C LC_ALL=C LC_MESSAGES=POSIX

sudo sh -c 'echo "deb http://packages.namniart.com/repos/ros trusty main" > /etc/apt/sources.list.d/ros-latest.list'

wget http://packages.namniart.com/repos/namniart.key -O - | sudo apt-key add -

sudo apt-get update && sudo apt-get install build-essential ros-indigo-ros-base ros-indigo-common-msgs ros-indigo-tf ros-indigo-tf2 ros-indigo-tf2-ros

sudo rosdep init && rosdep update

Setup your environment:

echo &quot;source /opt/ros/indigo/setup.zsh&quot; &gt;&gt; ~/.zshrc
echo &quot;source ~/ros_catkin_ws/devel/setup.zsh&quot; &gt;&gt; ~/.zshrc
echo &quot;export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/ros_catkin_ws&quot; &gt;&gt; ~/.zshrc         
echo &quot;export ROS_WORKSPACE=~/ros_catkin_ws&quot; &gt;&gt; ~/.zshrc
source ~/.zshrc

echo "source /opt/ros/indigo/setup.zsh" >> ~/.zshrc

echo "source ~/ros_catkin_ws/devel/setup.zsh" >> ~/.zshrc

echo "export ROS_PACKAGE_PATH=$ROS_PACKAGE_PATH:~/ros_catkin_ws" >> ~/.zshrc

echo "export ROS_WORKSPACE=~/ros_catkin_ws" >> ~/.zshrc

source ~/.zshrc

As ROS does not recognize Linaro as an OS:

sudo nano /etc/lsb-release

1	sudo nano /etc/lsb-release

and replace „Linaro“ with „Ubuntu“

Init a catkin workspace:

mkdir -p ~/ros_catkin_ws/src
cd ~/ros_catkin_ws/src
catkin_init_workspace

mkdir -p ~/ros_catkin_ws/src

cd ~/ros_catkin_ws/src

catkin_init_workspace

and test it:

cd ~/ros_catkin_ws/
catkin_make
source ~/ros_catkin_ws/devel/setup.zsh

cd ~/ros_catkin_ws/

catkin_make

source ~/ros_catkin_ws/devel/setup.zsh

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Archiv für den Monat: Mai 2014

Cron Jobs with Mac OSX

Mac OSX System Mail

UART on Pandaboard

Connect to Timecapsule Share with Windows

I2C on Pandaboard

FritzBox zu Mitternacht neu starten

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Dual Boot Ubuntu 14.04 LTS on Macbook Pro with Filevault 2

Write Linaro Image to SD Card with Mac

Fhem auf Radxa Rock installieren

Install ROS Indigo Igloo on Radxa Rock