Caught a mouse

Note for Pidora

Target: run a BT and ed2k client on raspberry pi
Results: Failed due to the insufficient cpu performance for amule and transmission

Steps:

1.
   win32diskimager: burn iso to sd card
2.
   create an empty file 'headless' in the folder '/boot'
   PS. I use centos in vmplayer to do this
3.
   find the ip of Pidora on raspberry pi
   you can do this by some ip scan program.
   some reference said the light/horn may tell the IP,
   but I can't get IP through these two methods.
4.
   ssh root/raspberrypi

5. resize and swap
   >> parted /dev/mmcblk0
   >> (parted) unit chs
   >> (parted) rm 2
   >> i
   >> (parted) mkpart primary 6,127,57  1746,198,43
   >> (parted) quit

   fdisk for swap   
   >> reboot
   >> resize2fs /dev/mmcblk0p2
   PS. some reference said no swap needed on a SD card due to the speed issue

6. add users
   root>> useradd -c "pidora" pi
   root>> passwd pi
   root>> visudo
   Fixed:
   %wheel ...
   %wheel ...

7. remote screen
   install & setup MobaXterm
   login
   >> startxfce4 &
  
   or
   >> yum -y install tightvnc-server
   setup firewall by MobaXterm with your root account
      Applications Menu / Settings / Firewall--> current/persistent view: check vnc server
   change desktop environment to XFce (gnome may go wrong)
   >> yum install switchdesk switchdesk-gui
   >> switchdesk xfce
      PS. every user should do this once

8. install some lib for compling
   >> yum groupinstall "Development Tools""Development Libraries"

9.

[Ref]
[1]. http://ruten-proteus.blogspot.tw/2013/06/pidora-remote-editor.html
[2]. http://ruten-proteus.blogspot.tw/2013/06/pidora-remote-editor.html
[3]. http://www.raspberrypi.org/phpBB3/viewtopic.php?t=45265&p=358409

Matlab: display numbers with higher precision in a MATLAB data cursor

Steps:
1. open one figure -> click 'label' symbol -> right click on the plot -> 'Edit Text Update Function' --> save as to your favorite PATH

2. edit the file 'NewCallback.m'
mofidy 'num2str(pos(2),4)' to 'num2str(pos(2),8)' or whatever you liked


3. click the 'label' bottom again -> 'Select Text Update Function' according to the path of your modified file

4. done

[Ref] http://stackoverflow.com/questions/5961034/how-can-i-display-numbers-with-higher-precision-in-a-matlab-data-cursor

Useful notes for freeware

Firefox:
{Addons}


Thunderbird:
useful addons:
  lightning

Freefilesync:
automatically synchronizing two folders
In Task Scheduler, create a Basic Task with
“C:\Program Files\FreeFileSync\FreeFileSync.exe”
as the program and
“C:\Users\ValuedUser\Batch Files\SyncSettings.ffs_batch”
as the optional added argument. Is it critical that both of the above options be inside double quotes.
[Ref.1] http://www.trustyetc.com/trustyblog/2012/10/07/automatic-backup-with-freefilesync/
[Ref.2]http://vermeiliatips-trick.blogspot.tw/2011/03/how-to-set-freefilesync-realtimesyncexe.html

monitor CPU temperature in Centos6

Environment:
Centos 6

Steps:
1.  install software
> yum install dmidecode lm_sensors lm_sensors-devel gnome-applet-sensors

2.  setup the configuration
> /usr/sbin/sensors-detect

3. observe  the temperature
> /usr/bin/sensors


[Ref]

1. http://www.wretch.cc/blog/IBATAHIRO/12541732