Saeid Zebardast's Blog » Tips

Installing Sun JDK 5 on Ubuntu 9.10 and 10.04

Saeid Zebardast — Mon, 03 May 2010 02:21:19 +0000

Hello

As you known, Sun JDK version 1.5 or 5 is deleted from Ubuntu 10.4 and 9.10 repositories and the version 6 has been replaced.

The easiest way to install Sun JDK 5 version is add its repository from Ubuntu 9.04 to the list of repositories in 9.10 and 10.04. For this purpose, follow the steps.

1- Open /etc/apt/sources.list with a text editor like gedit:

sudo gedit /etc/apt/sources.list

2- Add the following lines to the end of the file then save it and close:

  ## For sun-java5-jdk
 deb http://ir.archive.ubuntu.com/ubuntu jaunty-updates main multiverse

3- Update the packages lists and install sun-java5-jdk:

 sudo aptitude update
 sudo aptitude install sun-java5-jdk

* Above method can be used for other applications.

Another way to install jdk 5 is download software package and its dependencies from packages.ubuntu.com.

Good luck

About Saeid Zebardast

I'm Senior software engineer with 5+ years of professional experience includes cross-platform proficiency with considerable knowledge of programming languages especially Java and programming paradigms such as OO and development methodologies. Also I'm MySQL DBA since 2006.

How to extract embedded images from .xls, .ods or .odt

Saeid Zebardast — Thu, 14 May 2009 12:50:29 +0000

It’s simple. Just 4 steps:

Save a copy of the file as ODS (OpenOffice.org Spreadsheet).
Change the filetype of the copy to ZIP (for example rename File.xls to File.zip).
Open the ZIP.
In the directory called Pictures will be the images, just as in the original.

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How to posting to Identi.ca from the CLI

Saeid Zebardast — Mon, 16 Feb 2009 13:30:13 +0000

Identi.ca is an open source social networking and micro-blogging service.
I like Ideni.ca. It’s good service.

I use CLI (command line) everyday. I like to dented from it. It’s simple.
Just install cURL:

$ sudo apt-get install curl

And type:

$ curl -u username:password -d status="message" http://identi.ca/api/statuses/update.xml

You will receive a response containing the XML coding for your post which acts as a confirmation that your post was submitted.

Also you can create a shell file for this
Open a new text document and add the following, save it as identica.sh (or anything ending in sh):

#!/bin/bash
curl -u username:password -d status=″$1" http://identi.ca/api/statuses/update.xml

Make sure you change the chmod to 777 using the following command.

$ chmod 777 /path/to/file/

When you located the file (or add a bash prompt) it makes it simplier to identi.ca the rules. For example you can type the following to command to link to the file.

$ ./path/to/idetica.sh "Message"

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Nested X11 environment session

Saeid Zebardast — Mon, 07 Apr 2008 19:15:28 +0000

Instead of using a full-blown new virtual X for developing software you can use Xephyr to embed your KDE 4 session into your working KDE 3 or other X11 environment.

If you want to get a minimal KDE session up and running, just launch Xephyr (available in Kubuntu as xserver-xephyr; Gentoo users compile x11-base/xorg-server with USE=”kdrive”):

Xephyr :1 -extension GLX &

You can now launch KDE:

export DISPLAY=:1
/path/to/kde4/bin/startkde &

For other X11 environment just change /path/to/kde4 like:

/usr/bin/startx &

/usr/bin/startkde &

/usr/bin/startxfce&

You can use “locate” command to find paths like:

locate startkde

Appendix
• Happy Nowruz 1387 (Iranian new year holiday)

Good Luck

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What's dpkg-reconfigure

Saeid Zebardast — Thu, 31 Jan 2008 16:05:01 +0000

Reconfigure an already installed package like gdm.

dpkg-reconfigure package_name

For example you can reconfigure X Server:

sudo dpkg-reconfigure xserver-xorg

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Root Terminal in Ubuntu

Saeid Zebardast — Tue, 18 Dec 2007 08:38:07 +0000

Hi
Ubuntu has the root account disabled.
You use sudo to run commands as root. if you need root access for some work:

To start a root shell, but keep the current shell’s environment, use:
```
sudo -s
```
To start a root shell (i.e. a command window where you can run root commands), starting root’s environment and login scripts, use:
```
sudo -i
```

There is also a root terminal that is in the Applications menu. You have to right-click to edit the menu’s and add a check to the root terminal in System Tools items.

Don’t forget to type ‘exit’ (or press Ctrl+D) to switch back to your normal user when you are done.

• More information about sudo in Ubuntu wiki

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