Shutdown -h

I am shutting down the blog section. Eventually will move the content to the main site.

Close all post for commenting to avoid spam. Will keep the post for references

Upgrading to FC5

Time to upgrade to FC5…

First we upgrade our system to the latest FC4 updates:
yum upgrade

Upgrade the fedora release:
rpm -Uvh

Upgrade the yum:
yum upgrade yum

And now time for the full system upgrade:
yum upgrade

Wait……….do a reboot and you are up and running.

appending the bash history

One common problem with the default settings of bash or the defaults settings of your bash_profile ~/.bashrc is the bash_history.

When you logout from your shell all the commands you entered there are writteen to the bash_history. Hmmm what happens when you logout from 2 or more shells ? Yes the last history list is written = you loose what you typed in the others shells you closed.

Instead of overwriting the history list to the history file you can append it.

shopt -s histappend
export HISTSIZE=4096

We also change the default HISTSIZE from 500 lines to 4096

Add the commands you your ~/.bashrc ~/.bash_profile and you are up and running

Intermediate pressure test

What do you do when you want to check your first stage ?

Option 1: Send it to GKAM

Option 2:

Step 1: Get the IP test guage from GKAM 🙂
Step 2: Attach it to the low-pressure BC hose

The IP pressure from the first stage of Ray is 10.5 bar. And has a fast response when you breath from the octupus. Looks ok to me….

Draeger Ray Tests…

I spend my whole day at work reading the manual. Normally i don’t read the manuals. This time i did it and i really enjoy it.

The Draeger Ray manual is more than complete. They explain everything from the complete assembly and dissasembly of the unit to pre and post dive maintainance and all the risks (and believe me there are a lot).

With the help of the manual i did an initial assembly. Just the tank the first stage regulator and the dosage unit.

First test shows me a flow of 5lt/min. According with the manual i should get 8.25 lt/min +/- 20% this value is out of the range.

Since the tank has about 50bar i thought that this is our problem. Wrong, the dosage unit has dirt and needs to be cleaned 🙁

Draeger Ray

Yesterday i got a very interesting phone call from my friend GKAM, a known rebreather diver in the greek underwater community.

Here is the conversation:

GKAM: Bill i found a Draeger ray are you still interested ?
Me: Sure, when can i buy it ?
GKAM: Tomorrow i think
Me: Ok sounds nice

Honest i couldn’t sleep that night. When this guy propose you something you allready know 2 thinks:

a) That it is a bargain
b) That is works

I was searching for a rebreather for more than a year. My search on ebay didn’t went as i expected. A lot of Dreager Dolphins but most of the time they ended with a buyer and they appear again a couple of days later with the same decription and photos. I bid twice on them just to get a nice email message from the buyer to finish the auction outside the ebay. Since the price was on average 1700 Euros i didn’t risk it.

Date 26 February Time late in the noon
I went to see the rebreather with the money in my pocket 🙂

The reb is ready to dive, condition as new.

It came with 2 dosage heads one 32% and one 50%, the first one still sealed, an oxygauge with a sensor, and 5 lt of DiveSorb.
Yes i bought it.

Finally i am a happy owner of a Draeger Ray Rebreather.

This is how our story starts….. and believe me we have a lot of work to do in order to dive it plus now we have one more reason to finish our ppo2 display…

Photos coming soon

WordPress 2.0 and a Happy New Year

First of all Happy new Year 🙂

This year started with the release of WordPress 2.0. WordPress is going better and better. The 2.0 version is slick and you get a WYSIWYG editor among the changes.

To be honest for some reason i got the latest.tar.gz containing WordPress 2.0 on Dec 27. The timestamp for my wp-config.php and .htaccess just after the upgrade is Dec 27 11:02. The upgrade from 1.5 took no more than 10 minutes without  any problems.

So in short happy bloging with WordPress 2.0

Playing with LVM

My main problem all the time is that i have small capacities on hard disks (8GB,10GB) and so on.

I don’t want to throw them away but i don’t want also to leave them lying around.

This time i did an exception: i bought a big one, a Western Digital WDC WD2000JB (200GB) plus this time i didn’t the same mistake => That is create partitions with knowning how big it should be and how you will resize them on the feature.

So i desided to give a try to LVM. LVM isn’t as difficult as it sounds. Follow the howto and you will be up and running in seconds.
Initialize the disk

[root@bofh ~]# pvcreate /dev/hdc
Physical volume “/dev/hdc” successfully created

Create a volume group
[root@bofh ~]# vgcreate volume_group /dev/hdc
Volume group “volume_group” successfully created

[root@bofh ~]# pvdisplay /dev/hdc
— Physical volume —
PV Name /dev/hdc
VG Name volume_group
PV Size 186.31 GB / not usable 0
Allocatable yes
PE Size (KByte) 4096
Total PE 47695
Free PE 47695
Allocated PE 0
PV UUID xWttvY-ruQD-AaiC-ibkp-SPk1-v5nZ-GMLXVY

Creating a logical volume
[root@bofh /]# lvcreate –size 10GB volume_group -n backups
Logical volume “backups” created

Create a filesystem on the /dev/mapper/volume_group-backups mount it and you have finished

When i will need more space for my backups i will do a lvextend extend the filesystem and that’s it.

Plus i can attach other harddisks on the lvm anytime i want 🙂

Converting ext3 to reiserfs

I am a fun of reiserfs. Period.

The only filesystem i had without reiserfs was on my laptop. 20GB of data on ext3.

I wanted to converted to reiserfs without doing a tar create a new filesystem on the disk and untar the data. Since i had a working backup set, i give a try on convertfs (

Boot from a CD with builtin kernel support for the filesystems you want to convert from and to.

Build the convertfs utilities on another machine and start the conversion.

Warning: It takes a lot of time. On my laptop (Pentium M 1.3 GHz) took about 2 hours to do the conversion.

Change your fstab and boot in a your new filesystem.

Everythink worked as expected.

Case closed.

Asterisk 1.2 Released

The release of asterisk 1.2 came sooner than i expected ( At the time i write this an 1.2 asterisk is being built on my machine.

From the asterisk web site “This release of Asterisk contains over 3,000 improvements on version 1.0, including hundreds of new features and applications.”

When we will find time to test them ?

Debian Installer etch beta 1 released

Debian team released the new installer for the etch.

It appers that the next time (in about 1-2 years 🙂 that you will install Debian you will have a graphical version of the installer.

For the rest of us, an apt-get dist-upgrade will be sufficient 🙂

Also they dropped support for installations using 2.6 kernel for the sparc32 architecture…..

Time to buy a sparc64 ?

Asterisk Releases… I cannot follow anymore

I don’t know what is going on on Digium but i must admit i cannot follow their releases anymore

Have a look on the announcements

Asterisk 1.2.0-beta1 29 Aug 2005
Asterisk 1.2.0-beta2 1 Nov 2005
Asterisk 1.2.0-rc1 9 Nov 2005
Asterisk 1.2.0-rc2 12 Nov 2005

It appears that we will have a stable 1.2.0 till the end of the month.

I will do some tests in my production voip with the 1.2.0-rc2. The machine still runs on 1.2.0-beta1 and i want to upgrade it but i have no spare time…

New FreeBSD logo

The competition is over.

Finally after about 8 months from the announcement we have a new Logo.

And believe me it is really nice (
Even if it isn’t the daemon, we will get used to it