These are my links for 17 feb 2010 through 18 feb 2010:
Puppet is system administration – Automated. – Puppet is a declarative language for expressing system configuration, a client and server for distributing it, and a library for realizing the configuration. By saving you countless hours of frustration, monotony, and/or reinventing the wheel, Puppet can change your life. Here are some key points about Puppet: Puppet lets you perform normal administrative tasks (such as adding users, installing packages, and updating server configurations) on any number of systems, even if those systems are running completely different operating systems. Through the use of providers, Puppet takes a generic instruction from you (such as ensuring MySQL is installed) and performs the task the "right way" for each system. Whether you have a small, heterogeneous network of user workstations or a cluster of rack-mounted number-crunchers, Puppet can help reduce your overhead and get the everyday management of your network under control so you can concentrate on the real problems.
These are my links for 11 feb 2010 through 12 feb 2010:
pwnat – NAT to NAT client-server communication – pwnat, pronounced "poe-nat", is a tool that allows any number of clients behind NATs to communicate with a server behind a separate NAT with *no* port forwarding and *no* DMZ setup on any routers in order to directly communicate with each other. The server does not need to know anything about the clients trying to connect.
Unix File and Directory Permissions and Modes – Unix and Linux systems (including Mac OS X and other POSIX compliant systems) have a (relatively) simple system for controlling access to files and directories. This system is defined in POSIX.1:2008 standard external link, also known as the Single Unix Specification (SUS version 4). And since devices such as disks, ports, etc. have file names (under /dev) you control access to them the same way. (Note Windows systems up through Windows ME don't support permissions, just a "read only" attribute.)
Il pane, qui : A totanus in the net – Il pane qui si fa – ma non si cuoce – con la macchina del pane. La macchina, infatti, fa molto bene la parte faticosa di impastare, ma fa molto male la parte rilassante del dare forma e cuocere[...]
These are my links for 8 feb 2010 from 14:31 to 17:26:
Performance Tuning with "nmon" – Use this WebWizard to start Performance Tuning your IBM pSeries running AIX. This WebWizard assues you are using a freely available and very useful tool called nmon – full detail on getting this are below. nmon – is strongly recommended as it provides all the AIX statistics constantly updated on a "dumb" screen.
IBM Performance Management for Power Systems : overview – Your IBM Power™ Systems model (including the IBM System i®, the IBM System p® and the new POWER6™ models) can be one of your company's most valued assets. But it is an absolute requirement you understand the utilization and growth of your system to help with making better plans for reducing cost, improving service and managing risk. Building a dynamic infrastructure that accommodates the changing demands of your business in a planet becoming smarter is critical.
UNIX Performance Management – The purpose of this paper is to introduce the performance analyst to some of the free tools available to monitor and manage performance on UNIX systems, and to provide a guideline on how to diagnose and fix performance problems in that environment. The paper is based on the author’s experiences with AIX and will cover many of the tools available on that and other UNIX platforms. It will also provide some Rules of Thumb for analyzing the performance of UNIX systems. The paper has been updated to include some of the things that can be done in order to make sure that the web server will perform well.
UNIX BASH scripting: Replace values in XML using sed and awk – [...]Even though sed or awk is not suggested to work with XMLs (generally a programing language like Perl or Python is more preferred), there can be simple cases where we can make use of sed or awk to perform certain search and replace in simple XML s. Here is an simple example[...]