September 20, 2014
Recently, Talend Open Studio For Big Data was recommended for me, so I thought I’d try it out.
But as I’ve so often encountered with Java on Linux, the install was a long process, full of java error stacks, google searches, research, trial and error, debugging, forum posts, and so on. Sigh, not again!
Here’s what I did to get Talend Big Data to install and work. Big errors I encountered are detailed at the bottom.
Talend Open Studio 5.5.1
Download Talend Big Data Software:
Read the rest of this entry »
September 10, 2014
Firefox saves a lot of log information in RDBMS files that can be queried in sqlite, using standard SQL commands.
To query the files, you have to have the right version of sqlite. Turns out that an old version was installed with my Redhat Linux 6.4 installation and I had to upgrade it in order to see the data. Here is how you can install the software and query the logs.
When I ran sample sqlite queries I found on the web, I got lots of errors:
sqlite3 ./cookies.sqlite 'select count() from moz_cookies'
Error: file is encrypted or is not a database
Read the rest of this entry »
September 9, 2014
New to Linux? Here’s some information that might be useful.
Linux is different from Windows in how software is installed. In Windows, starting with a CD, DVD, or an executable file, you run an executable file and install the software, usually via a GUI with prompts.
However, in Linux, there are at least 3 or 4 different ways to install software:
yum (related to rpm)
Unzip a file into a directory
Run an executable file or script Read the rest of this entry »
July 8, 2013
The instructions for installing Gephi can be found at:
They seem simple enough. But I found out that on a 64 bit server, it’s really important that you have a full 64/64/64 bit combination. That represents the operating system, Java, and Gephi. Here are some hints to get it right.
Be sure to download the right java file. Read the rest of this entry »
July 7, 2013
Recently I’ve been working with the graph database, NEO4J. Much of the usefulness of graph software is in visualizing it. So, I decided to install Gephi on Redhat 6.4. Gephi installed on Redhat easily enough. But it did not display the most important thing, the graph window! :(
Gephi With No Graph Section
The Gephi website says: “Gephi uses an OpenGL 3D engine to speed up graph visualization. However a compatible graphic card is required.”
Here’s how you can add some debugging to Gephi. Read the rest of this entry »
July 6, 2013
You might have read of how long and complex it is to install OBIEE directly onto Redhat.
OBIEE SampleApp v207 Desktop
This year I heard that there was a new Virtual Box image of OBIEE. The idea being: you install and start Virtual Box, then use the OBIEE virtual machine. Great idea. You should be able to get on with actually using OBIEE, not struggling with its installation, startup, and administration.
However, that would assume that all the components work. Like any technology stack.
Unfortunately for me, they did not.
Installing Virtual Box 4.2.12 r84980: Read the rest of this entry »
June 25, 2013
After writing the long post, Secrets of BIOS, Grub, and Triple Boot Servers, I still had some notes left over.
Here’s some more detailed info on the many different ways that hard drives are identified in my server using: Phoenix BIOS, ASUS BIOS 1006, Sept 1, 2008. There are at least 9 different properties or ways to identify them.
|Disk Drive Model Name
|BIOS Boot Order
Make sense? Quick, how many can you recall?
Note: Redhat 6.4 is the main boot disk. After booting Redhat 6.4, the /dev/sd? is what is indicated by running fdisk -l. Please read the previous post for the details.