These are my links for 24 lug 2013 through 2 ago 2013:
wg/wrk · GitHub – wrk is a modern HTTP benchmarking tool capable of generating significant load when run on a single multi-core CPU. It combines a multithreaded design with scalable event notification systems such as epoll and kqueue. [ via http://onethingwell.org/post/56882294128/wrk ]
Automate and manage systems installation with Cobbler – Cobbler simplifies system provisioning by centralizing the tasks that are involved in setting up and administering an installation server. This article discusses some of Cobbler's features, how to install it, and how to create a configuration suitable for automatically installing multiple client machines.
Cobbler – Linux install and update server – Cobbler is a Linux installation server that allows for rapid setup of network installation environments. It glues together and automates many associated Linux tasks so you do not have to hop between many various commands and applications when deploying new systems, and, in some cases, changing existing ones. Cobbler can help with provisioning, managing DNS and DHCP, package updates, power management, configuration management orchestration, and much more. (And you can integrate with chef or puppet)
Redhat I/O Scheduler Configuration in a Virtual Machine. – FATMIN – [...] However, because of the fact that ESX is its own built in elevator, the Linux kernel's elevator is not needed, and in fact can hurt disk performance. So its best to disable the elevator inside your linux VMs [...] Da controllare comunque dovrebbe andare anche su altre distro
RDP with NLA from Linux – Is there a way to connect to a Windows 2008 Remote Desktop Services with NLA from Linux? Yes! FreeRDP is a fork of Rdesktop. Rdesktop seems to have stopped developement, so a fork is very welcome. NLA is still not in the main release, but it isn't hard to check out a copy from GIT and compile the latest source yourself.
These are my links for 21 giu 2013 through 24 giu 2013:
Base64 Decode and Encode – Online – Have to deal with Base64 format? Then this site is made for You! Use the super simple online form below to decode or encode Your data. If You're interested about the inner workings of the Base64 format, just read the detailed description at the bottom of the page. Welcome!
Two default routes – Linux has very advanced routing, filtering and traffic shaping options. Here is how to configure a system with two default routes.
Getting Started with Puppet – Hello World! | ScriptRock – As there’s a lot of interest out there in the various automation tools on offer I thought I’d do a series of blogs covering getting started on each. In particular I wanted to put them to the test regarding how simple it is to go from zero to “Hello World” *. This way I get to play the truly dumb user (not much of a stretch, I know), which is kinda fun too.
These are my links for 18 giu 2013 through 19 giu 2013:
CommuniGate Pro: Cluster Load Balancers – The DSR/DR is the preferred Load-Balancing method for larger installations. When this method is used, each Server is configured to have the VIP (Virtual IP) shared addresses as its local IP addresses. This allows each Server to receive all packets directed to the VIP addresses, and to send responses directly to the clients using the VIP as the "source" address. The servers should not respond to the arp requests for these VIP addresses. Instead the load balancer responds to these requests, and thus all incoming packets directed to the VIP addresses are delivered to the load balancer, which redirects them to Servers. When redirecting these incoming packets, the load balancer sends them directly to the Server MAC address, without changing the packet destination address, that remains the VIP address.
Configuring DSR on the Alteon load balancers | Remsys – As per Wikipedia, load balancing is a technique to spread work between two or more computers, network links, CPUs, hard drives, or other resources, in order to get optimal resource utilization, maximize throughput, and minimize response time. Usage of multiple components with load balancing, instead of a single component, may increase reliability through redundancy. DSR is a way for outbound traffic to bypass the load balancer, sending traffic directly to the default router of that network.
FreeIPA – FreeIPA is a Red Hat sponsored open source project which aims to provide an easily managed Identity, Policy and Audit (IPA) suite primarily targeted towards networks of Linux and Unix computers. FreeIPA can be compared to Novell's Identity Manager or Microsoft's Active Directory in that the goals and mechanisms used are similar.
Using static passwords for authentication, as it is commonly done, has quite a few security drawbacks: passwords can be guessed, forgotten, written down and stolen, eavesdropped or deliberately being told to other people. A better, more secure way of authentication is the so called "two-factor" or "strong authentication" based on one time passwords. Instead of authenticating with a simple password, each user carries a device ("token") to generate passwords that are valid only one time.
client for: Standard phone and BlackBerry (J2ME) iPhone Google Android Windows Phone 7 PalmOS webOS Maemo Openmoko Universal Web App Windows Linux MacOS
Server-Side: Mobile-OTP Authentication Server (MOTP-AS) Full blown RADIUS server specifically for Mobile-OTP. include: - authenticating users by RADIUS (and optionally PAM or Apache) - SQL database for user/device configuration - Administration Web Interface
Open Monitoring Distribution – Wiki – OMD – Welcome to OMD – the Open Monitoring Distribution. OMD implements a completely new concept of how to install, maintain and update a monitoring system built on Nagios.
OMD avoids the tedious work of manually compiling and integrating Nagios addons while at the same time avoiding the problems of pre-packaged installations coming with your Linux distribution, which are most times outdated and provide no regular updates.
OMD bundles Nagios together with many important addons and can easily be installed on every major Linux distribution. We provide prebuilt packages for all enterprise Linux distributions and also for some other, such as Ubuntu 11.04.