The complete guide for this can be checked here

1. Boot up your Pi
2. Connect ethernet cable to your Pi
3. SSH into it (You can check the IP from your wireless router DHCP client list)
4. Open up /etc/network/interfaces:

$ sudo vim.tiny /etc/network/interfaces

You'll see few lines of basic configuration:

auto lo
iface lo inet loopbackiface eth0 inet dhcp

allow-hotplug wlan0iface wlan0 inet dhcpwpa-conf /etc/wpa_supplicant/wpa_supplicant.confiface default inet dhcp

$ sudo vim.tiny /etc/wpa_supplicant/wpa_supplicant.conf

Just copy and paste below script inside that file:

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdevupdate_config=1network={ssid="YOURSSID"psk="YOURPASSWORD" 

# Protocol type can be: RSN (for WP2) and WPA (for WPA1)proto=WPA 

# Key management type can be: WPA-PSK or WPA-EAP (Pre-Shared or Enterprise)key_mgmt=WPA-PSK 

# Pairwise can be CCMP or TKIP (for WPA2 or WPA1)pairwise=TKIP 

#Authorization option should be OPEN for both WPA1/WPA2 (in less commonly used are SHARED and LEAP)auth_alg=OPEN 

}

Change ssid, psk, proto, key_mgmt, pairwise and auth_alg according to your wireless router setup.

6. And after you finished, reboot the pi:

$ sudo reboot

7. Upon booting, unplug ethernet cable and try to access your Pi via wireless connection (check the IP from your wireless router DHCP client list)

Just repeat the steps if you still haven't seen your Pi in the DHCP client list.

 

I'm sure you can find many other posts about installing and running rplay in raspberry pi. If you haven't heard about rplay, this amazing software is developed by company called Vmlite, that gives us possibility to experiencing airplay mirroring without having Apple TV (but, of course, you still have to own an iOS device :D) by install it on small computer Raspberry Pi. You can check here if you want to know more about this amazing little device.

On many other posts, rplay have to be installed on raspbian, a debian-based linux distro customized for Raspberry Pi. In my situation, since I only have small-size SDcard (4 GB), I can't installed raspbian because it needs you to have at least 8 GB SDcard size. And, I also would like to use raspbmc (XBMC based) to be a media centre and powering up my old CRT TV. So, this post is pure notes of my experience. Let's start :)

I assume most of you who read this post already have Raspberry Pi, and already installing raspbmc on it and using it for many purposes.

1. From Raspbmc dashboard, go to Power Icon on bottom left, then choose EXIT:

$ sudo apt-get update

5.  Installing rpi-update:

$ sudo curl -L --output /usr/bin/rpi-update https://raw.github.com/Hexxeh/rpi-update/master/rpi-update && sudo chmod +x /usr/bin/rpi-update

6. Updating the firmware:

$ sudo rpi-update

7. Allocate more memory to GPU:

$ sudo raspi-config

8. Installing other dependencies:

$ sudo apt-get install libao-dev avahi-utils libavahi-compat-libdnssd-dev libva-dev youtube-dl

9. Updating youtube-dl:

$ sudo youtube-dl --update

10. Download rplay binary and install:

$ wget -O rplay-1.0.1-armhf.deb http://www.vmlite.com/rplay/rplay-1.0.1-armhf.deb

$ sudo dpkg -i rplay-1.0.1-armhf.deb

$ sudo /etc/init.d/rplay start

$ sudo /etc/init.d/rplay stop

$ sudo /user/bin/rplay

http://<ip-address-of-pi>:7100/admin

http://localhost:7100/admin (If you use the browser on the same Pi machine)

admin_password=adminpassword=onscreen_code=0 [or 1]fullscreen=0 [0r 1]license_key=1223dd-your-from-email

$ sudo apt-get install youtube-dl$ sudo youtube-dl –update

$ sudo /etc/init.d/rplay stop$ sudo dpkg -r rplay

You will get the license key and details about rplay installation by register, login and post in Vmlite forum page.

Some posts on the internet say that we should disable the xbmc in order the rplay to running well. You could refer to Raspbmc FAQ here. But in my situation, I don't need to do that and airplay mirroring feature working just fine.

If you have audio problems, please refer to this article. And if your iOS devices don't see rPlay in the AirPlay device list, make sure avahi daemon is running on the Pi device, refer to this article.

So, that's it. Enjoy the features in airplay and airplay mirroring with rplay in Raspberry Pi :)

In my works, sometimes I need to configure router/wireless router with my PC. But since my PC only has one ethernet port that configured with static IP address, I have to find a way to be able to configure the router/wireless router without unplug it. One way is by adding secondary (virtual) IP address on existing ethernet port.

You can do this by using temporary or permanent way.

Temporary way:
Pretend that your ethernet is eth0, and you know that DHCP block IP from the router/wireless router is 192.168.1.0/24, you can set static IP address in that range:

$ sudo ip addr add 192.168.1.11/24 dev eth0

And when you finished, you can just delete that temporary additional IP:

$ sudo ip addr del 192.168.1.11/24 dev eth0

Permanent way:
You can add permanently by adding config in /etc/network/interfaces file:

auto eth0:1
iface eth0:1 inet DHCP

Then you set eth0:1 to be up:

$ sudo ifup eth0:1

Check to make sure you've got the correct IP address assignment:

$ sudo ifconfig -a | grep eth0 

 

The scenario is I want to use an old PC (1GB RAM, HDD 20GB, Pentium-class) as a Samba share (file server). So I installed CentOS 6.5 on it, put a 3TB external HDD on it and then doing this configuration:
1. Migrating /home partition to 3TB external HDD
2. Configuring samba
3. Adding user and share

1. Migrating /home partition to 3TB external HDD:
I'm using this URL as a guidance, but I re-write this as simple as I have done:
a. Check the UUID of external HDD

$ sudo blkid

b. Backup /etc/fstab

$ sudo cp /etc/fstab /etc/fstab.$(date +%Y-%m-%d) 

c. Compare the two fstab files

$ cmp /etc/fstab /etc/fstab.$(date +%Y-%m-%d)

d. Edit original /etc/fstab

# (identifier) (location) (format) (some settings)
UUID=???   /mnt/home   ext3   defaults   0   2

replace the ??? in UUID with the one you've got from blkid command for your HDD

e. Create the mount folder

$ sudo mkdir /mnt/home

f. Reload the updated /etc/fstab

$  sudo mount -a

g. Copy existing /home to new partition

$ sudo rscync -aXS --exclude='/*/.gvfs' /home/. /mnt/home/

h. Confirm that all files and folders are copied successfully

$ sudo diff -r /home /mnt/home

i. Edit /etc/fstab, preparing for switch

# (identifier) (location) (format) (some settings)
UUID=???   /home      ext3       defaults   0   2

j. Moving /home to /old_home

$ cd / && sudo mv /home /old_home && sudo mkdir /home

k. Reload the updated /etc/fstab

$ sudo mount -a 

2. Configuring Samba:
a. Edit /etc/samba/smb.conf

security = user
[share]
     path = /home
     browseable = yes
     writable = yes
     public = yes
     guest ok = yes

b. Restart Samba service

$ service smb restart
$ service nmb restart 

3. Adding User and share:
a. Add samba user without UNIX login:

$ useradd -s /sbin/nologin [username]

b. Set samba password for new user:

$ smbpasswd -a [username]

c. Put the new user in the user group:

$ usermod -a -G [username] [usergroup] (e.g. usermod -a -G andy andy)

d. Set priviledge to certain folder only available to certain user/group:

$ chmod 775 /home/[username] 

You can check that there will be new folder created under /home with username you create. Using this command:

$ ls -lart /home

You can see that each of that folder own by username, this way when another username access the samba share, they can see another user folder, but don't have the priviledge to access them. This config already tested in my office with many users using different OS (Windows, Mac, Linux).

 

 

 

 

 

 

 

Ubuntu Server 12.04 comes with Python version 2.7 by default. Unfortunately, there are some apps development out there that still using Python 2.6. Here are some simple workaround to change the default Python2.7 to Python2.6:

1. Preliminary requirement:

$ sudo apt-get install python-software-properties

2. Adding PPA (because Python2.6 is not available anymore on Ubuntu Server 12.04, by default):

$ sudo add-apt-repository ppa:fkrull/deadsnakes

3. Update repository:

$ sudo apt-get update

4. Installing Python2.6:

$ sudo apt-get install python2.6 python2.6-dev

5. Change the symlink to Python2.6:

$ sudo ln -sfn /usr/bin/python2.6 /usr/bin/python

6. Check the version:

$ python --version

That's it, and you're done :)

 

 

 

 

Topology:
Linux-based PC: 192.168.1.1
Linux-based Laptop: 192.168.1.7

In PC, you edit /etc/ssh/sshd_config using any editor you like:

$ sudo vi /etc/ssh/sshd

Looking for this line, or you can add if it's not already there:

X11Forwarding     yes

Save that file and restart SSH service:

$ sudo /etc/init.d/ssh restart

Allow Laptop to run X applications:

$ xhost 192.168.1.7

Define default display:

$ export DISPLAY=192.168.1.1:0

Then from Laptop terminal, run the command to execute any X applications you like:

$ ssh -X [username]@192.168.1.1 firefox

$ ssh -X [username]@192.168.1.1 oowriter

That's it! :)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

On this past few weeks, I've been back using mutt. And this time, with much advanced configuration. One of its configuration is opening URL inside emails on your favorite browser. The requirement is simply using urlview that you can download from here (I'm using version 0.9), extract and compile it. Then add this config to your .muttrc file:

macro index \cu |urlview\n      # simulate the old browse-url function                                                                                                           

macro pager \cu |urlview\n

Also, you need to add ~/.urlview and put this line:

REGEXP (((http|https|ftp|gopher)|mailto)[.:][^ >"\t]*|www\.[-a-z0-9.]+)[^ .,;\t>">\):]

COMMAND <your-browser> %s

After all done, try to open one email in your mutt. Then in view mode, press ctrl-u and urlview will listing all available URL inside that email. You just have to choose one and press Enter, and your browser will automatically open and load that URL.

 

Here's how to open .uif file in Ubuntu Linux:
1. Install uif2iso package

$ sudo apt-get install uif2iso

2. Run command to convert .uif to .iso file

$ uif2iso file.uif file.iso

3. Mount .iso file

$ mkdir ~/iso_file
$ sudo mount file.iso ~/iso_file -t iso9660 -o loop

That's it! :)

If you happen to experience the same flaw to installing Java on Ubuntu 12.04, then you could do these steps:

sudo rm /var/lib/dpkg/info/oracle-java7-installer*
sudo apt-get purge oracle-java7-installer*
sudo rm /etc/apt/sources.list.d/*java*
sudo apt-get update
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer

Proven to be worked well :) Credit goes to the Ubuntu Forum thread here

If you're the person who always logging anything like I do, probably you should try Simplenote , "easy way to keep notes, lists, ideas, and more" -- that's what they say in their website :)

For me, the ubiquity to using their service in many platform is their advantage. As a vim user, fortunately there are already many plugins to support my need in using Simplenote service, and one of them is Vimplenote

One reason for choosing Vimplenote than another plugins is because it's the easiest one to configure. I also using Vundle, Vim package manager to install and manage my vim plugins.

Enough said, just follow my steps to do it:
1. I prefer clean install, so move your ~/.vim and archive it

$ mv ~/.vim ~/.vim-bk

2. Create new ~/.vim and ~/.vim/bundle (to contain your plugins)

$ mkdir -p ~/.vim/bundle

3. Setup Vundle

$ git clone https://github.com/gmarik/vundle.git ~/.vim/bundle/vundle

4. Configuring .vimrc

 set nocompatible               " be iMproved
 filetype off                   " required!

 set rtp+=~/.vim/bundle/vundle/
 call vundle#rc()

 " let Vundle manage Vundle
 " required! 
 Bundle 'gmarik/vundle'

 " My Bundles here:
 "
 " original repos on github
Bundle 'mattn/vimplenote'

Bundle 'mattn/webapi'

 " ...

 filetype plugin indent on     " required! 
 "
 " Brief help
 " :BundleList          - list configured bundles
 " :BundleInstall(!)    - install(update) bundles
 " :BundleSearch(!) foo - search(or refresh cache first) for foo
 " :BundleClean(!)      - confirm(or auto-approve) removal of unused bundles
 "
 " see :h vundle for more details or wiki for FAQ
 " NOTE: comments after Bundle command are not allowed.. 

5.  Get webapi-vim and vimplenote-vim

$ git clone git://github.com/mattn/webapi-vim.git ~/.vim/bundle/webapi
$ git clone git://github.com/mattn/vimplenote-vim.git ~/.vim/bundle/vimplenote

6. Running and installing bundle

$ vim
:BundleInstall

7. Using Vimplenote (do it inside vim)

:Vimplenote -l     " list of your Simplenote notes (you'll be prompted to fill in login credentials)
:Vimplenote -d    " delete your current note
:Vimplenote -n    " create new note
:Vimplenote -u    " update current note
:Vimplenote -t     " add a tag to a note
:Vimplenote -s    " search a note

And you're good to go :)

You can also see the README file in every plugin page to see additional info.

You can see the source of this blogpost here. I just re-write on my blogpost according to my own experience, trials and errors :)

I assume that you already have all requirement to connect to your TouchPad (Palm SDK, Linux Access, etc.)

Here's what you have to do:
1. Check the actual space used by /media/internal, write down or take screenshot

# df -h | grep internal

 2. Disconnect cryptofs

# pkill -SIGUSR1 cryptofs

3. Unmount /media/internal

# umount /media/internal

4. Verifying you have clean filesystem, before resizing (in my case, there are differences between boot sector and its backup, but I just choose 'no action' )

# /usr/sbin/fsck.vfat /dev/mapper/store-media

5. Verify how much space used by /media/internal

# lvscan | grep media

6. Decide and take space allocated for ext3fs partition (I took 2GB ext3fs partition for DebianChroot, so I resize /dev/mapper/store-media became 10.64G, from 12.64G)

# resizefat /dev/mapper/store-media 10.64G

8. Use free 2G partition to make ext3fs partition

# lvcreate -l 100%FREE -n ext3fs store

9. Format the partition with ext3 filesystem

# mkfs.ext3 /dev/mapper/store-ext3fs

10. Make the filesystem writable

# mount -o remount,rw /

11. Make mount directory

# mkdir /media/ext3fs

12. Add a line in /etc/fstab to automount ext3fs partition on boot up

# echo "/dev/mapper/store-ext3fs /media/ext3fs auto noatime 0 0" >> /etc/fstab

13. Make the filesystem back to read-only

# mount -o remount,ro /

14. Reboot

# reboot

That's it! And I'm pretty sure that you can apply this to any webOS devices :)

Recently I've got a problem with SSL certificate for outgoing mail server on my Palm Pre. Here's what the error look like:


I looked around in the internet to find a solutions, then I found this page (forgot about the link, but I'm certain that was Palm Support page) that says mail server's certificate should be in X.509 (CER) file format:


Already asked System Administrator to send me the file, but it takes too long. So initiatively I look another way to provide the certificate file myself, and I can do it using openssl command in Ubuntu Linux (You can use openssl in Windows as well). First, I create a script that generate the certificate I need from mail server, name the file any name you want (you can see in the script I used retrieve-cert.sh):

#!/bin/sh
#
# usage: retrieve-cert.sh remote.host.name [port]
#
REMHOST=$1
REMPORT=${2:-443}

echo |\
openssl s_client -connect ${REMHOST}:${REMPORT} 2>&1 |\
sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p'

Add execute (+x) on file properties, then run the files:

$ chmod + retrieve-cert.sh
$ ./retrieve-cert.sh mail.server.hostname 465 >> coid.cer

As you can see, I'm adding '>> mycert.cer' to save the results directly to mycert.cer file, at the command above. Sure I can add this to the script, but this way I can generate any file name I want :)

Then, you must convert that .cer file into X.509 format:

$ openssl x509 -in coid.cer -out coidx509.cer

And you're finish. You can send coidx509.cer file via email that already setup on your Pre, or you can transfer it via USB mode and open it using Internalz.

When you tap on that file, Certificates Manager window will open and ask what do you want to do with it:


Just tap on 'Trust Certificate'. If you want to see it later, open 'Device Info' on your launcher, then tap drop-down menu on top left, tap on 'Certificate Manager...'


That's it. I setup my mail account once again, and sure it can sent email without any error :)

Default repository on Ubuntu 10.04 prevent us to have version of Firefox above 3.6.x, but with this simple workaround, you can get newest version (7.0.1) for Firefox and Thunderbird, also.

What you have to do is adding this line into /etc/apt/sources.list:

#Firefox-Stable
deb http://ppa.launchpad.net/mozillateam/firefox-stable/ubuntu hardy main
deb-src http://ppa.launchpad.net/mozillateam/firefox-stable/ubuntu hardy main

Do the regular:

$ sudo apt-get update
$ sudo apt-get install firefox

And it's done! :)

Here's what you need to have a decent Fluxbox windowmanager on Ubuntu Server. After all, you don't need a heavy windowmanager on your server :)

$ sudo apt-get install fluxbox fbpager fbdesk xserver-xorg xfs xfonts-terminus-oblique xfonts-100dpi xfonts-75dpi xfonts-scalable xinit

 And that's it! :)

After doing Ubuntu double upgrade (from 10.04 to 10.10, then continue with 10.10 to 11.04), I've got this error while logging in into the system:

exec: 3: /usr/lib/update-notifier/update-motd-cpu-checker: not found
run-parts: /etc/update-motd.d/20-cpu-checker exited with return code 2
run-parts: failed to stat component /etc/update-motd.d/50-landscape-sysinfo: No such file or directory
exec: 3: /usr/lib/update-notifier/update-motd-updates-available: not found
run-parts: /etc/update-motd.d/90-updates-available exited with return code 2
exec: 3: /usr/lib/update-notifier/update-motd-reboot-required: not found
run-parts: /etc/update-motd.d/98-reboot-required exited with return code 2

Apparently, some package were removed during the upgrade process. All I need to do was installed one packaged:

$ sudo apt-get install update-notifier-common

And everything's back to normal afterwards :)

If you ever got the GPG errors while updating your Ubuntu sources, here's what you have to do to overcome it:

Example of the error might be like this:

W: GPG error: http://ppa.launchpad.net lucid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EF4186FE247510BE

And you just need to execute these two commands:

# gpg --keyserver hkp://subkeys.pgp.net --recv-keys KEY
# gpg --export --armor KEY | sudo apt-key add -

Just replace ke KEY with the one that exist on the error. According to the example, the command should be like this:

# gpg --keyserver hkp://subkeys.pgp.net --recv-keys EF4186FE247510BE
gpg: requesting key 247510BE from hkp server subkeys.pgp.net
gpg: key 247510BE: public key "Launchpad PPA for Ubuntu Mozilla Daily Build Team" imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1  (RSA: 1)

# gpg --export --armor EF4186FE247510BE | sudo apt-key add -
OK

Then you can continue with:

# apt-get update

That's it. Why don't you try it yourself now :)

I need this package to be able run Go Aruna Desktop client on my Ubuntu 10.04. Here are what I did:
1. Add new sources

# sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"

2. Then do the usual update

# sudo apt-get update
# sudo apt-get dist-upgrade

3. Installing the package

# sudo apt-get install sun-java6-jre

4. Done

Probably you already read my another blogpost about ttytter. This one is additional information on how to enabling popup notifications (like Growl in Mac OS) . According to my previous blogpost, you can run ttytter by executing this command:

# ./ttytter

And, if in any case, you missed it, then you just need to go to FloodGap website, scroll down a little bit, then under the "Download and change-log" section: right click and save file as 'ttytter' (without extension).



Open terminal, go to the directory where you keep the 'ttytter' file and I'm going to improve that a little bit by moving ttytter file to /usr/local/bin:

# sudo mv ttytter /usr/local/bin

Installing notification system
In order to be able to receive a popup notification, you must installing several package from Ubuntu repositories:
1. Installing git-core and libgtk2-perl-notify package

$ sudo apt-get install git-core libgtk2-notify-perl

2. Make sure you in your home directory by typing:

$ cd

3. Then do these steps:

$ git clone http://github.com/colindean/ttytter-libnotifyperl.git
$ sudo apt-get source libnotify-bin
$ sudo apt-get install gtk-doc-tools
$ sudo apt-get build-dep libnotify

4. Download this patch
5. And do these steps:

$ cd libnotify-0.4.5/ (or whatever version/ directory name you have there, according to version downloaded)
$ patch -p0 < ../notify-send-support_body_from_file.patch
$ ./autogen.sh
$ make
$ sudo make install

After all done, you need to go here to create your own .ttytterrc file and put it in your home directory. That's it. Credit goes to stormsdragon. Enjoy! :)

Recently I just managed partitioning my Pre to make it possible running UbuntuChroot in it. Yes, you've got it right, UbuntuChroot running on my Pre. You can see here for the Wiki. The hard thing is the first part, because you have to Meta-Doctor-ing your Pre, so it will have separate ext3fs partition. I'm Doctor-ing using webOS 2.1.0, and skip the "git" part, you have to search for it in the internet.

1. Here's the command I used:

$ make DEVICE=preplus CARRIER=wr VERSION=2.1.0 ENABLE_DEVELOPER_MODE=1 DISABLE_UPLOAD_DAEMON=1 DISABLE_UPDATE_DAEMON=1 CUSTOM_MODEL_LIST=P100UEU CUSTOM_BOOTLOGO=scripts/WebOS-Internals.tga EXT3FS_PARTITION_SIZE=2GB clobber all

2. After it done, run the installation process. And continue with configuration to automounting ext3fs partition at device boot.
3. Using Preware, activate the testing feed, then installing Xcecutah, Xserver and UbuntuChroot 11.04
4. Launch Excecutah to run Xserver and UbuntuChroot 11.04, here's what I've got:



5. You can use usual Ubuntu apt-get command to update repository and installing packages. And you can also use apt-cache search to look for certain packages that works on ARM processor.
6. This is the screenshot of htop running on my Pre:

Just installed on my PC running Ubuntu Server 10.04, a little hard to find source to add to repository. But here it is, all you need to do is just follow these steps:

1. Make sure you have installed Nautilus

$ sudo apt-get install nautilus

2. Install public key to authenticate Dropbox's Ubuntu repository

$ sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 5044912E

3. Add source to repository

$ sudo vim /etc/apt/sources.list
#Dropbox
deb http://linux.dropbox.com/ubuntu lucid main

4. Update repositories

$ sudo apt-get update

5. Install Dropbox integration for Nautilus

$ sudo apt-get install nautilus-dropbox

6. Starting Dropbox daemon

$ dropbox start -i

You have to restart all intances of Nautilus, then start Dropbox and fill in your account information. That's it! :)