Linux System Admins Blog

System admins of Promet – an e-commerce, high availability Open Source web shop – share their findings

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My First Amazon EC2 Setup (CentOS AMI)

June 29th, 2009 · No Comments

Here’s my first try working with Amazon Web Services. Covered tasks are the following:
- getting familiar with AWS, specially EC2 and S3.
- working with EC2 instance using CentOS image – search, start/stop, and do some customization of an instance
- create AMIs (private) and start instance from it.
- S3 buckets – upload files.
I based my [...]

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Tags: Centos · HowTo · Storage · cloud computing

Running ASDM client from your Linux desktop

March 10th, 2009 · 2 Comments

For those of us who use Linux as a desktop replacement for Windows would find it nice to be able to run the ASDM client natively. If you haven’t upgraded your ASA/PIX to the latest ASDM you should do so. The steps are described here.

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Tags: cisco · desktop

Upgrade to Java SE 6 update 12 on Fedora 10

February 9th, 2009 · No Comments

After our ASA units were updated to the latest version of ASDM my Java client would no longer connect to ASDM. An upgrade to the latest version of Java was in order. Since fedora yum repository does not yet offer the latest version of Java I downloaded the latest rpm variant of JDK from http://java.sun.com/javase/downloads/index.jsp
The [...]

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Tags: Installation · desktop

Monitoring a Java application from Nagios

January 5th, 2009 · 2 Comments

This is a slight departure from our regular programming. Instead of just concentrating on the sys admin side of things I want to show how to add a Nagios check to an existing application. In this case we have a Java application for which we want to monitor whether it is running or not. Later [...]

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Tags: Nagios · monitoring

Implementing AES encryption in the front-end

June 20th, 2008 · 1 Comment

This post describes a way to implement data encryption in the front-end of an application and how to make it compatible between a PHP front-end and a Java front-end.
First off we need to decide what type of encryption to use. AES is an encryption standard that has been endorsed by the NSA and is generally [...]

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Tags: Installation