[Eclipse][Oracle JDK] Eclipse Indigo crashes at startup in Ubuntu 12.04

Problem :

Eclipse crashes at startup in Ubuntu 12.04 displaying an error dialog with the message “An error has occurred. See the log file /home/user/.eclipse/org.eclipse.platform_3.7.0_155965261/configuration/[a_long_number].log.” The log file is attached to the report.

Solution :

Eclipse Indigo is not compatible with Oracle’s JDK, in my case, it is JDK 1.6.0_45.

But it works with Open jdk, so idea is to change Oracle JDK to Open JDK in ubuntu 12.04

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[Proxy Ubuntu] Configration of proxy in Ubuntu 12.04 for eclipse SVN

1. Configration proxy in Ubuntu :

System setting -> Network proxy as diagram below :

Apply your own configration of proxy.

2. Configration proxy for SVN :

Go to ~/.subversion folder, modify the file servers :

Uncomment these lines and add your own configration proxy :

# http-proxy-host=your_host_name
# http-proxy-port=8080
# http-proxy-username=bo
# http-proxy-password=password

Make sure there is no gap on either side of “=” symbol

It will works your proxy.

[UBUNTU] Black screen when installation of Ubuntu 12.04 + solution

The problem which I met yesterday :

1. trying to install ubuntu 12.04, and black screen (solution in the POST precedent)

2. after installation ubuntu 12.04 successfully, when reboot and black screen

There are some diagrams which could be more clear :

When you arrive at this step below, just press shift key on your keyboard.

Press e to edit your start command, change quiet splash to nomodeset  and press Ctrl+X on keyboard.

After you reboot successfully, open a terminal, and follow the tips below:

You should add this option to /etc/default/grub, firstly:
sudo nano /etc/default/grub

and then add nomodeset to GRUB_CMDLINE_LINUX_DEFAULT:
GRUB_DEFAULT=0
GRUB_HIDDEN_TIMEOUT=0
GRUB_HIDDEN_TIMEOUT_QUIET=true
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset"
GRUB_CMDLINE_LINUX=""

And then simply run:
sudo update-grub

You can also find the solution in the following URL, especially the answer of Coldfish in the second URL which provide a solution to update grub :

http://askubuntu.com/questions/162075/my-computer-boots-to-a-black-screen-what-options-do-i-have-to-fix-it

http://askubuntu.com/questions/38780/how-to-set-nomodeset-for-installation/38782#38782

[UBUNTU] “No root file system is defined” error during installation

First to install Ubuntu OS into a PC which have window installed. You can follow this toturial : http://askubuntu.com/questions/141108/how-to-install-ubuntu-os-having-already-installed-windows-os

But there is little trap that we should pay attentation, in the following image, the point if we choose the paths other than /, it will not work, so just let / choosen and install.