Clustering, Featured, Glassfish, Headline, How-to, Java, Linux, Shell »

[4 May 2011 | 3 Comments | ]

Finlay is here. For me, Glassfish 3.1, was one of most awaited piece of software, for all it’s new features and clustering support. Glassfish 3.1 slightly changed the way to install cluster, in a much better and integrated way. This version come with a lot of new functionality, but also with improved parts related to Glassfish 2.1.

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Clustering, Featured, Glassfish, How-to, Java, Mysql »

[14 Apr 2011 | No Comment | ]

Is not a bug, but a pretty annoying configuration thing which appear when you try to configure Enhanced Broker Cluster in Glassfish. I configured my persistent store, for Enhanced Broker Cluster, as jdbc / MySQL:

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Clustering, Debian, Featured, Glassfish, How-to, Java »

[14 Mar 2011 | One Comment | ]

Why you choose SNMP when Glassfish have strong JMX support? I presume, the answer for all who use SNMP is (almost) the same: Because the architecture of current monitoring solution is not scalable enough, and I cannot load my monitoring servers with supplementary JAVA processes.

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Books, Featured, Headline »

[25 Feb 2011 | 2 Comments | ]

Howdy everyone! Because I travel a lot, I build a list of books which I should buy and read next in the airports, bus stations etc or everywhere I should wait some amount of time. This list contain everything what an System / Application Administrator should know. I’m usually dealing with Java/Tomcat/Glassfish/Jboss under Linux, but also I have a strong background of networking, security and cloud computing. This books are my choice and I think is a good choice for everyone who want to learn or improve your skills as …

Android, Google, Linux, Random »

[10 Feb 2011 | No Comment | ]

My new phone just arrived. Google Nexus S is a piece of “art”, full of features. For me is the perfect phone. I can read my email, rss feeds instantly and I can browse all my websites. Also the browser is a full featured browser (93 points from 100 in acid3 test, and in my firefox 3.6.13 under Ubuntu 10.10 I get 94 points 🙂 ) with Adobe Flash on a Super AMOLED 4 inch screen. Also the Android market is full of applications and games. Everything on this …

Bugs, Debian, Java, Kernel, Linux »

[8 Feb 2011 | 2 Comments | ]

This, probably, is a bug which was not spotted very often because is very obscure and the Debian guys moved very quick and fixed the problem. I know, I found a lot of bugs related to sun.jvm.hotspot.debugger.NoSuchSymbolException: Could not find symbol “gHotSpotVMTypeEntryTypeNameOffset”, but this is different. Usually was a problem of “striping symbols from libjvm.so”, but in my case wasn’t that. Also I found this error related to OpenJDK (I use Sun JDK) and the solution was to use -server flag to get the correct libjvm.so. Anyway it took me …

Debian, Linux »

[13 Jan 2011 | No Comment | ]

I’m curios how this Debian installer will look. The features are amazing:
Live Installer
Grub 2
Kernel 2.6.32
Xen support
UserMode Linux Support
Ext4

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Debian, Linux, Security »

[9 Jan 2011 | No Comment | ]

This is a little bit old, but is worth to mention it because on a lot of system is still working. The proof of concept code and a lot of details you will find here: http://bit.ly/fYpOtx . This exploit is based on 3 vulnerabilities found by Nelson Elhage (probably because of that exploit is named full-nelson). As I said the exploit is based on 3 vulnerabilities CVE-2010-4258, CVE-2010-3849 and CVE-2010-3850. The last 2 vulnerabilities are based on Econet protocol driver. If you don’t have this driver loaded exploit will not …

Apache, Debian, Featured, Headline, How-to, Linux, Security, Shell »

[30 Dec 2010 | No Comment | ]

Everyone, with a decent Linux security knowledge, should know about ModSecurity – Open Source Web Application Firewall. Personally, I know this mod from 2004 and it help me a lot in detecting and/or preventing malicious attacks before reaching my customers applications.

Desktop, Ubuntu »

[21 Oct 2010 | No Comment | ]

I experienced another nasty bug with vino server and Ubuntu 10.10 (some reports the same thing on other Distros, even on older versions of Ubuntu): After authenticating on VNC, the client windows is not updated.

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