Ubuntu 14.04 "System program problem detected"

Have you turned on your Ubuntu 14.04, and suddenly found this message: System program problem detected.

This is the crash report for Ubuntu, normally it should go away, but sometimes it come backs on every boot. So what I do, it's just as simple to remove all files from /var/crash directory.

To remove crash report files, you only need open a terminal window (Ctrk-Alt-T) and type the following command:

$ sudo rm /var/crash/*

I hope this helps you to stop displaying this messages.

USB devices not working on my Virtualbox

As I'm now moving to Ubuntu exclusively! but wait I need to do some things to do in Windows. So I had to install Virtualbox and then suddenly I have to connect some USB dongle into my Virtual Windows, but sadly it didn't work.

I did my research on internet, so the problem was easy to solve, just add the user that it's running Virtualbox to the vboxusers group, like this:

$ sudo usermod -G vboxusers -a YOUR_USER

But for some reason, it didn't work until I restarted. Maybe I just only needed to log out and log in back.

Also if you need it, you can list all your USB devices connected to your Ubuntu with this command:

$ lsusb

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 005: ID 2232:1029
Bus 001 Device 006: ID 0cf3:3004 Atheros Communications, Inc.
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 003: ID 046d:c52b Logitech, Inc. Unifying Receiver
Bus 003 Device 004: ID 04b9:0300 Rainbow Technologies, Inc. SafeNet USB SuperPro
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

References:

Ask Ubuntu Virtualbox docs

Color Picker for Ubuntu

I'm used have a color picker on my Windows dev machine called Color Cop. But now I found a replacement for my Ubuntu 14.04 called Gpick, so it's very easy to install just do:

 $ sudo apt-get install gpick

Happy coloring your html files.

How to Install Oracle Java on Ubuntu 14.04

Hi, this is my first post to this blog, I just installed Ubuntu 14.04 LTS. And it has been a great experience. But I will dig more about my install experiences at another time.

Ok let's see how to install Oracle JDK 1.6. Beware that this is Oracle JDK and not Open JDK.
First download jdk1.6 here.

You will get a file like this one: jdk-6u45-linux-x64.bin. Then open a terminal and go to you downloads directory.

1. Give execution privilege to the file:

 $ chmod a+x jdk-6u45-linux-x64.bin
 

2. Run file to extract contents.

 $ ./jdk-6u45-linux-x64.bin
 

3. Move jdk to /usr/lib/jvm

 $ sudo mv jdk1.6.0_45 /usr/lib/jvm
 

4. Create Symbolik Link

 $ sudo ln -s /usr/lib/jvm/jdk1.6.0_45/ /usr/lib/jvm/jdk1.6
 

5. Change group and owner.

 $ sudo chown root:root -R /usr/lib/jvm/jdk1.6.0_45/
 

6. Add variables to global profile, first edit your profile with your favorite editor

 $ sudo vi /etc/profile

Add this at the end:

 export JAVA_HOME=/usr/lib/jvm/jdk1.6
 export JRE_HOME=$JAVA_HOME/jre
 export PATH=$PATH:$JAVA_HOME/bin:$JRE_HOME/bin

7. (Optional) Create Symbolic Links

 $ sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.6/bin/java 100
 $ sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.6/bin/javac 100
 $ sudo update-alternatives --install /usr/bin/javaws javaws /usr/lib/jvm/jdk1.6/bin/javaws 100
 

And that's it. You can test your installation with the following commands.

 $ java -version
 $ javac -version
 $ javaws -viewer
 

Update 2015-07-04

Today I followed this guide using JDK 1.5 (jdk-1_5_0_22-linux-amd64.bin) and everything was fine.

Update 2015-07-31

Today I followed this guide using JDK 1.8 (jdk-8u45-linux-x64.tar.gz) and everything was fine. The only difference insetead of running a .bin file you need to run:

 $ tar -xvzf jdk-8u45-linux-x64.tar.gz