Web server cluster with SUSE Linux Enterprise Server 10

Spreading a workload across multiple processors, coupled with various software recovery techniques, provides a highly available environment and enhances overall RAS (Reliability, Availability, and Serviceability) of the environment. Benefits include faster recovery from unplanned outages, as well as minimal effects of planned outages on the end user.To get the most out of this article, you should be familiar with Linux and basic networking, and you should have Apache servers already configured. Our examples are based on standard SUSE Linux Enterprise Server 10 (SLES10) installations, but savvy users of other distributions should be able to adapt the methods shown here.

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Make a copy of virtual machine with Vmware Server

It’s proven to be that during software development process, research activities and etc., using of virtulization is invaluable. In my practice I use Vmware Server, so the next article would be useful.

First of all, we need to find where all our virtual machines are in our system. After small search I’ve found vmware files in /var/lib/vmware/Virtual Machines. There are some set of directories each corresponds to some of your already created virtual machines. In my case I was interested in cloning virtual machine with name db1 to new machine db2 and then to db3.

Continue reading about virtual machines cloning with Vmware Server…

Ancient domins list (the oldest ones ever registered)

Do you know when the first domain was registered and what was it? Do you think it was microsoft.com? Or maybe att.com? ibm.com? Not exactly. The first one was symbolics.com registered at 15-Mar-1985. Below is the list of oldest domains ever:

15-mar-1985 symbolics.com
24-apr-1985 bbn.com
24-may-1985 think.com
11-jul-1985 mcc.com
30-sep-1985 dec.com
07-nov-1985 northrop.com
09-jan-1986 xerox.com
17-jan-1986 sri.com
03-mar-1986 hp.com
05-mar-1986 bellcore.com
19-mar-1986 ibm.com
19-mar-1986 sun.com
25-mar-1986 intel.com
25-mar-1986 ti.com
25-apr-1986 att.com
08-may-1986 gmr.com
08-may-1986 tek.com
10-jul-1986 fmc.com
10-jul-1986 ub.com
05-aug-1986 bell-atl.com

As you can see some notable nowadays ones are missing. So, here are their registration dates:

10-may-1994 linux.org
19-sep-1994 freebsd.org
13-jan-2001 wikipedia.org
15-sep-1997 google.com
18-jan-1995 yahoo.com
10-nov-1994 msn.com
15-jul-1999 paypal.com
02-may-1991 microsoft.com
07-mar-1997 w3c.org
22-nov-1988 dell.com
17-nov-1986 amd.com
22-sep-1993 cnn.com
20-oct-1998 ask.com
15-jul-1989 bbc.com

I was amazed. What about you? 🙂

Vim text editor manual for newbies

Vim is a highly configurable text editor built to enable efficient text editing. It is an improved version of the vi editor distributed with most UNIX systems.Vim is often called a “programmer’s editor,” and so useful for programming that many consider it an entire IDE. It’s not just for programmers, though. Vim is perfect for all kinds of text editing, from composing email to editing configuration files.

Here is a link list of online manuals for newbies:

vimdoc: html + pdf
eandem: pdf
Hawaii College of Engineering: html +pdf

Find out where Unix/Linux executable binary is located

There are two commands that may help you to find where executable binary is located regardless it’s Unix or Linux system. They are whereis and type. First locates source/binary and manuals sections for specified files and second tells what exactly shell executes when you type a certain command.

The next picture shows examples of these commands work.

Find out where Unix/Linux executable binary is located

Producing Open Source Software book

Freely available in pdf and html book about how to Run a Successful Free Software Project can be found here.

Producing Open Source Software is a book about the human side of open source development. It describes how successful projects operate, the expectations of users and developers, and the culture of free software…

Producing Open Source Software book

Desktop Linux distributions popularity 2007

Which Linux distros do we use on our home or office desktop system(s)?

2007-distributions-sm.jpg

More information is here.


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