My web wanderings

Two articles I need to read and put into practice.
CLI Magic: rsync for backups
CLI Magic: rsnapshot

The Ten Commandments of system administration, part I

Part 1. Backups!!

An in-depth exploration of the art of shell scripting
By: Mendel Cooper

How to Set Up a Jabber Server LG #112 by Suramya Tomar
This is a great article to help us complete our internal Jabber Server.

By Erik Inge Bolso on Tue, 2005-03-01 00:00.

Keeping directories in sync on multiple machines can be difficult. Running Unison is one way to make the task easier.

Unison is a file-synchronization tool that runs on Linux, UNIX and Microsoft Windows. Those of you who’ve used IBM Lotus Notes or Intellisync Mobile Suite probably have an idea of what synchronization is good for, as compared to one-way mirroring options such as rsync. You might have mirrored a company document directory to your laptop, for example, and then modified a document or two. Other people might have modified other documents in the same directory by the time you get back. With rsync, you’d need to reconcile the differences between the two directories manually or risk overwriting someone’s changes. Unison can sort out what has changed where, propagate the changed files and even merge different changes to the same file if you tell it how.

Full article

Here is an article on Filesystem integrety checkers. There are several filesystem integrity checker applications, both commercial and open source. I chose to deploy afick, because it is written in Perl, which makes it lightweight and easily portable between different operating systems. Though by nature designed for the command line, afick also has an optional Webmin module and a graphical interface written in perl-Tk.

Here is an article on Filesystem integrety checkers. There are several filesystem integrity checker applications, both commercial and open source. I chose to deploy afick, because it is written in Perl, which makes it lightweight and easily portable between different operating systems. Though by nature designed for the command line, afick also has an optional Webmin module and a graphical interface written in perl-Tk.

Here is an ONLamp article that is interesting. “By recording performance metrics, web server administrators can have a historical record of how the server handled incoming HTTP requests. This article expands on that concept by adding a couple of logging directives and recording the logging data directly in a MySQL database.”

RTG: Real Traffic Grabber
RTG is a flexible, scalable, high-performance SNMP statistics monitoring system. It is designed for enterprises and service providers who need to collect time-series SNMP data from a large number of targets quickly. All collected data is inserted into a relational database that provides a common interface for applications to generate complex queries and reports. RTG includes utilities that generate configuration and target files, traffic reports, 95th percentile reports and graphical data plots. These utilities may be used to produce a web-based interface to the data.

Build an Open Source Network Sniffer
This article reviews common issues of wireless security, and shows how to use open source software to suss out wireless networks, get information about them, and start recognizing common security problems. You will learn how build a lightweight wireless sniffer that runs on open source software and see how simple it is to interact with wireless networks

Home Page
NagMIN is a WebMIN module that provides centralized, integrated, web-based management of popular Open Source monitoring tools to help create a holistic network monitoring environment.

Linux Web Filtering with DansGuardian and ClamAV


12 Aug 2004: A web filter is software that can filter the type of content a Web browser
displays. The filter checks the content of a Web page against a set of rules
and replaces any unwanted content with an alternative Web page, usually an “Access
Denied” page. The type of content to be filtered is usually controlled
by a systems administrator. Web filters are used in schools, libraries, homes,
and companies to safeguard personnel from obscene content on the Internet.