Install InstantClient on Ubuntu

There are many tutorials, but I want to complete with some tricks I just found :

  1. in your .bashrc, just add at the end :
    # Oracle instant client
    export LD_LIBRARY_PATH=/home/sinclair/Products/instantclient_10_2
  2. in your untargzed directory of ruby-oci8 installation, create a script file with :
    #!/bin/bash
    export LD_LIBRARY_PATH=/home/sinclair/Products/instantclient_10_2
    ruby setup.rb configure
    make
    make install
  3. launch this script with sudo command

Smbfs / Cifs share on Synology NAS and Ubuntu

If you get some issue with mounting shares with your NAS from your Ubuntu OS, consider this :

With SMBFS : this solution is unsupported, you have to use CIFS. For example, in your fstab :

//192.168.1.250/public /media/NAS cifs iocharset=utf8,user=diskstation_username,password=diskstation_password,rw,uid=ubuntu_username,gid=ubuntu_username 0 0

With CIFS : if you can mount your share directory, but listing returns always an empty list, there is the solution.

I found another workaround in a ds101 mailing list : you can disable “unix extensions” in the ds106’s samba server. To achieve this, you need to add the folowing line in the [global] section of /usr/syno/etc/smb.conf :

Code:
unix extensions=no

Then, restart samba :
DiskStation> /usr/syno/etc/rc.d/S80samba.sh restart

source : http://www.synology.com/enu/forum/viewtopic.php?=&p=6244

Ubuntu post installation

Must have package that should be installed by default (if you use Nautilus) :

  • nautilus-image-converter

And another file manager (IMHO better than Nautilus) :

  • thunar : for example, you can with a simple right click send files or even directory to thunderbird (strictly impossible with Nautilus), you can launch a term in the current directory, you can paste into the folder trackbar, etc.

How to replace definitely Nautilus by Thunar ? 2 solutions :

Ruby vs Java

Un article avec évidemment un parti pris, mais qui met tout de même en avant quelques avantages certains à programmer en Ruby…

http://www.rubyrailways.com/sometimes-less-is-more/

Quelques perles :

Java:

Class Circle
private Coordinate center, float radius;

public void setCenter(Coordinate center)
{
this.center = center;
}

public Coordinate getCenter()
{
return center;
}

public void setRadius(float radius)
{
this.radius = radius;
}

public Coordinate getRadius()
{
return radius;
}
end;

Ruby:

class Circle
attr_accessor :center, :radius
end

ou encore :

Java:

new Date(new Date().getTime() - 20 * 60 * 1000)

Ruby:

20.minutes.ago

UML tools under Linux

After some researchs, I have tested Umbrello which is directly installable from Synaptic and Bouml that you can find here in deb format package.

I found that Umbrello is very intuitive, you can import Java classes, make some code reverse engineering and of course generate code. But you don’t have all UML schemas (for example, I didn’t find sequence diagram).

Bouml includes every UML diagrams that I known and is a good alternative.

MVNO’s prices in EU (Cellphone call rates)

In order to compare, I will give you the prices of few europeans contry, thoses prices are based on Prepaid card only, and are the cheapest of the country.

I will not write the suscription/sim card fees since they are not consumption based.

The prices are per minute, and (per second) is written when a minute can be divised.

France

Call: 0,42 €/mn (second after the first second)

SMS: 0,10€

MMS: 0,30€

DATA(Gprs): 0,15€/10kb (yes 15€/Bb)

Minimum price per month : 3,33€

MVNO: Virgin Mobile

UK

Call: 0,22 €/mn (First 5 minutes of call) and 0,07€/min after

SMS: 0,17€

MMS: 0,35€

DATA(Gprs): 1€/Mb (limitted at 1,2 per day)

International: 0,30€/min

Minimum price per month : NA

MVNO: Virgin Mobile

ITALY

Call: 0,19 €/mn

SMS: 0,15€

MMS: 0,60€

DATA: NA

International: 0,50€/min

Minimum price per month : 15€

MVNO: Tim

SPAIN

Call: 0,14 €/mn (per sec) + 0,14€/call (establishment)

SMS: 0,12€

MMS: 0,35€

DATA(Gprs or 3G): 0,007€/Kb

International: 0,60€/min

Minimum price per month : 7€

MVNO: Yoigo

Belgium

Call: 0,20 €/mn (second after the first minute)

SMS: 0,10€

MMS: 0,39€

DATA(Gprs): NA

International: 0,65€/min

Minimum price per month : NA

MVNO: Simyo

Germany

Call: 0,15 €/mn (second after the first minute)

SMS: 0,10€

MMS: 0,39€

DATA(Gprs): 0,24€/Mb

International: 0,30€/min

Minimum price per month : NA

MVNO: Simyo

Austria

Call: 0,069 €/mn

SMS: 0,15€

MMS: 0,30€

DATA: NA

International: NA

Minimum price per month : NA

MVNO: Yesss

Finland

Call: 0,07 €/mn (second after the first second)

SMS: 0,07€

MMS: 0,35€

DATA(Gprs or 3G): 0,70€/Mb

International: 0,57€/min

Minimum price per month : 0,50€

MVNO: Kolumbus

Resume SCP

A very good article, very useful, thanx to its author !

I often use the UNIX command line tool scp (secure copy) to copy a file to a remote server. However, scp has one major drawback: It doesn’t support resuming a transfer. So whenever I’m transferring a file and something comes up which interrupts my transfer–which is bound to happen–I’m cursing away at scp. The solution? Use rsync. It is overkill for most things I do, but when a transfer is interrupted, it is handy. Now, on to the doing.

I want to transfer the file “myFile” to the server “remoteMachine”, which I do with scp:
scp myFile remoteMachine:dirToPutIn/
(You should know this already if you’re reading this in the first place.)

(Muzak while the transfer is in progress; a loud wail and the sound of hair being torn out by its roots as the transfer comes to a grinding halt.)

Time to resume the file with rsync, which I do thusly:
rsync --partial --progress myFile remoteMachine:dirToPutIn/
The “–partial” argument is what does the trick. I added “–progress” because I like to see how the transfer is going; rsync understandably doesn’t show this by default as it is mostly used for purposes which don’t require live progress reporting (e.g. scheduled backups).

Because I know I’ll have this problem again at some point, I have created an alias in my shell’s (zsh) configuration file (~/.zshrc):
alias scpresume="rsync --partial --progress"
I know that rsync and scp are not necessarily related, but the name “scpresume” reflects the purpose of the task I wish to do. And getting it done is what matters the most after all.

Update:
Jan pointed out in a comment that rsync communication is not secure by default, and that you should use tunneling to achieve secure communication. Andi provides the solution which is quite simple: Use --rsh=ssh (use ssh as the remote shell). Thus, our alias from before would look like this: alias scpresume="rsync --partial --progress --rsh=ssh"

source

IGraal

Cela faisait longtemps que je voulais poster à propos de ce système de rémunération. L’interview sur le blog de Tristan Nitot résume bien le principe :

iGraal c’est une carte de fidélité géante que l’utilisateur installe gratuitement sur son navigateur internet. Igraal permet de gagner des euros sur tous les achats chez nos 350 partenaires (tous les plus connus du web sont là, liste complète). Toutes les catégories sont couvertes : enchères , hightech, maison, déco, fringues, voyages, jeux, télécom, petites annonces, finances… Autrement dit pour les initiés, iGraal intègre le cashback au navigateur.

Une fois installé, iGraal crédite votre compte : vous recevez un chèque à partir de 30 euros cumulés (un PC vous rapporte en moyenne 50 euros). C’est donc très simple et utile, d’où le succès d’iGraal dans le grand public.

Simple et rémunérateur !