geekism and nerdism

Bookmarks for 29 gen 2013 through 4 feb 2013

These are my links for 29 gen 2013 through 4 feb 2013:

  • » Linuxaria – Everything about GNU/Linux and Open source Glances a new system-monitor tool – Glances is a free software (licensed under LGPL) to monitor your GNU/Linux or BSD operating system from a text interface. Glances uses the library libstatgrab to retrieve information from your system and it is developed in Python.

    So another top/htop clone ?

    Yes and no, an unique thing about glances that I’ve immediately seen is that you can configure thresholds in its configuration file and see the status of your system resources with colors that indicates if everything is fine or not, at a glance.

  • Glances by nicolargo – Glances is a CLI curses based monitoring tool for GNU/Linux and BSD OS.

    Glances uses the PsUtil library to get information from your system.

    It is developed in Python.

  • tholman/zenpen · GitHub – A minimal web based text editor for the modern man
  • RealOpInsight – Advanced Monitoring Dashboard Toolkit for Nagios, Zabbix, Icinga and other common open source monitoring systems – RealOpInsight is an advanced monitoring dashboard toolkit for Nagios, Zabbix, Icinga and other common open source monitoring systems such as GroundWork, Centreon, Shinken and op5 Monitor. Being business process-oriented, RealOpInsight is especially useful in challenging operations environments such as Network Operations Centers (NOC) and large data centers

Bookmarks for 25 gen 2013 from 12:23 to 20:34

These are my links for 25 gen 2013 from 12:23 to 20:34:

  • Raspberry PI con XBMC | Andrea Beggi – […] Benché le prestazioni di rete lo rendano poco più di un giocattolo divertente, uno degli aspetti dove Raspberry PI da il megio di sé è la riproduzione di video: la GPU è sufficientemente potente per riprodurre senza alcun problema il video in HD: è stupefacente vedere una scatoletta così piccola riprodurre filmati in alta definizione su un televisore molto grande. Esistono due distribuzioni dedicate all’uso media center: Raspbmc e OpenELEC, entrambe basate sullo stupefacente XBMC, per il quale ultimamente ho preso una cotta […]
  • Kandan: n free open-source chat app – The slickest chat app out there. Open-source and well-supported to boot.
  • Heimdall – Glass Echidna – What is Heimdall?
    Heimdall is a cross-platform open-source tool suite used to flash firmware (aka ROMs) onto Samsung Galaxy S devices.

    How does it work?
    Heimdall uses the same protocol as Odin to interact with a device in download mode. USB communication in Heimdall is handled by the popular open-source USB library, libusb-1.0.

Bookmarks for 21 gen 2013 through 22 gen 2013

These are my links for 21 gen 2013 through 22 gen 2013:

  • PasswdFinder | Magical Jelly Bean – PasswdFinder is a neat freeware utility that helps you find your lost passwords. Once installed, it will show you passwords saved by web-browsers, email clients, instant messengers, FTP clients and other programs.

    [ via http://www.addictivetips.com/windows-tips/easily-view-saved-passwords-from-many-windows-apps-with-passwdfinder/ ]

  • Guacamole – HTML5 Clientless Remote Desktop – Guacamole provides access to desktop environments using remote desktop protocols like VNC and RDP. A centralized server acts as a tunnel and proxy, allowing access to multiple desktops through a web browser.

    No browser plugins are needed, and no client software needs to be installed. The client requires nothing more than a web browser supporting HTML5 and AJAX.

  • Nginx Load Balancing Basics – jsDelivr Official Blog – Nginx is a powerful high performance web server with a lot of features that can help high load projects to overcome their problems.
    Here you can see a particular feature of Nginx that allows you to load balance the traffic across multiple external and internal(on same hardware) servers.

Bookmarks for 17 gen 2013 through 18 gen 2013

These are my links for 17 gen 2013 through 18 gen 2013:

  • winsetupfromusb – Install Windows from USB – Google Project Hosting – Install Windows from USB

    [ via http://gioxx.org/2013/01/18/samsung-nc10-windowsxp/ ]

  • Nuova “vecchia” vita per il Samsung NC10 | Gioxx’s Wall – Il mio vecchio Samsung NC 10 mi ha servito egregiamente negli anni passati e dopo un upgrade di RAM ed una prossima sostituzione disco può ancora rivelarsi un fidato compagno di lavoro per chi non necessita di prestazioni particolarmente elevate. Ad Ilaria basta ad esempio navigare in internet (Firefox), gestire la posta elettronica (Thunderbird) e utilizzare la suite Office di Microsoft, che funziona ancora perfettamente in coppia con l’anziano sempreverde Windows XP, si, proprio lui!

    Ecco quindi cosa fare con una chiave USB da 512 MB o più (ne avete ancora una in giro, ne sono quasi certo, nascosta da qualche parte) che verrà utilizzata una prima volta per installare il sistema ed una seconda per effettuare un backup completo del disco pronto.

  • Changing Windows RDP port | MWalker | Technology Cadre – Sometimes it's nice to change the default listening port of the Remote Desktop Protocol (RDP) service. Running standard services on non-standard is a simple way to avoid scripted attacks against your systems. Turns out changing the RDP port is as simple as a registry setting and a reboot.
  • Portable-VirtualBox | Download of Portable-VirtualBox – Portable-VirtualBox is a free and open source software tool that lets you run any operating system from a usb stick without separate installation.

Bookmarks for 17 gen 2013 from 12:08 to 14:17

These are my links for 17 gen 2013 from 12:08 to 14:17:

  • grml.org – Debian Live system / CD for sysadmins and texttool-users – What is Grml?
    Grml is a bootable live system (Live-CD) based on Debian. Grml includes a collection of GNU/Linux software especially for system administrators. Users don't have to install anything on fixed storage. Grml is especially well suited for administrative tasks like installation, deployment and system rescue.
  • The Ultimate USB Stick Setup [splitbrain.org] – 32GB is a lot of space, so why not fill some of it with useful stuff you might need from time to time:

    Windows 7 Installer, because a Windows reinstalls tend to happen suddenly
    Some portable Windows tools, to make that System more bearable
    Some Linux Live system(s) for data recovery and general PC maintenance
    The Arch Linux install image, just in case someone needs assimilation
    Here's how I set it up.

  • ViewDNS.info – Your one source for DNS related tools!

    [ via https://delicious.com/farmando ]

Bookmarks for 16 gen 2013 through 17 gen 2013

These are my links for 16 gen 2013 through 17 gen 2013:

  • Graylog2 – Free open source self-hosted log management and exception tracking – Simple log management
    Graylog2 enables you to unleash the power that lays inside your logs. Use it to run analytics, alerting, monitoring and powerful searches over your whole log base. Need to debug a failing request? Just run a quick filter search to find it and see what errors it produced. Want to see all messages a certain API consumer is consuming in real time? Create streams for every consumer and have them always only one click away.

    Free and open source
    Graylog2 is free and open source. It is licensed under the GNU General Public License v3 (GPLv3) and all source code can be browsed on GitHub. The web interface is using Ruby On Rails, the server is written in Java.

    Used by professionals
    The first version of Graylog2 was released in July 2010. Since then there has been rapid and continuous development and a number of major releases.

  • Centralizzare i log mediante Elasticsearch, Logstash e Kibana – Mia mamma usa Linux! – Uno dei principali problemi che si rilevano in fase di debug delle anomalie relative ad applicazioni è la frammentazione delle informazioni. Tanti log, buona parte dei quali inutili, sono sparsi ovunque nelle macchine interessate all’erogazione di questo o quel servizio.
    Tipicamente quando si tratta di servizi ripartiti su più macchine è sempre necessario aprire diverse console all’interno delle quali, per ciascuna macchina, il (o i) file di log vengono aperti, filtrati stampati e via così, sino ad ottenere una situazione degna di Sherlock Holmes, in cui solo consumati ed abili detective riescono a trovare l’indizio che sfugge ai più.

    Esiste però una via migliore per gestire enormi quantità di log in una forma centralizzata, facilmente ricercabile e che usi un’interfaccia gradevole. Si tratta della combinazione di tre software: Elasticsearch, Logstash e Kibana.

  • Seminario “Evoluzione della virtualizzazione su Linux”: video uno e due – “Introduzione” e “Virtualizzazione” – Mia mamma usa Linux! – Nella giornata del 29 giugno 2012, presso l’hotel Holiday Inn di Rho si è svolto il secondo seminario di miamammausalinux.org, intitolato quest’anno “Evoluzione della virtualizzazione su Linux“.

    Viste le numerose richieste ricevute e rispettando sempre la filosofia alla base del progetto miamammausalinux.org, il video del seminario viene proposto integralmente nelle sue parti, insieme alla documentazione fornita ai partecipanti.

    Ecco le prime due parti.

Bookmarks for 15 gen 2013 through 16 gen 2013

These are my links for 15 gen 2013 through 16 gen 2013:

  • Simplify Advanced Shell Scripting With Ruby | AIX | IBM Systems Magazine | System p, System p5, Power System | Ruby, SSH, shell scripting, Bull Freeware, sysadmin, – IBM Systems Magazine – Ruby is just for experienced programmers. right? False! Originating in the mid-1990s, Ruby is a fantastic language, made popular recently by the Web application framework—Ruby on Rails. It’s a massively flexible and easy language to learn. You can find Ruby for AIX in the AIX Toolbox at the Bull Freeware. The script we’ll be creating will do the following:

     

    * Go through a large list of servers.
    * SSH them and determine whether the server is AIX.
    * If so, it will go through all disks, returning their type.
    * It will do all of this completely in parallel in batch at 25 sub-processes at a time.

  • Recovering a lost partition table with a VMFS volume | vInfrastructure Blog – Vi possono essere diversi motivi che portano alla perdita della tabella delle partizioni o alla sua corruzione. Nel caso di datastore VMFS le possibili cause sono: resignature da un altro sistema (ad esempio il backup server, nel caso funzioni in SAN mode), un errore umano (basta eseguire, su dischi condivisi, da vSphere Client un Datastore / Delete da un ESXi non ancora collegato al vCenter Server), o anche a causa di qualche problema lato storage (mi è capitato proprio questo caso di recente su uno storage entry level)[…]

    (Mi è capitato, ho seguito la kb di vmware e ne sono uscito. Comunque sto sudando ancora adesso…)

  • DataFart – DataFart lets you easily graph data from the command line.

Bookmarks for 28 dic 2012 through 9 gen 2013

These are my links for 28 dic 2012 through 9 gen 2013:

  • PeteNetLive – KB0000741 – HP and Cisco – VLANs and Trunks Confusion! – When I first started in IT, I went and did my Cisco CCNA. So I learned that to connect Cisco switches and pass VLAN traffic between them, I needed to create a 'Trunk' to pass the VLAN traffic. Fast forward a few years, and I now work for an HP reseller. Very early on I came to realise that what HP called a 'trunk' was very different from what I had been taught. Below is an article I did a while ago about setting up HP Trunks.
  • OpenNOP – Open Network Optimization Platform – OpenNOP is an open source Linux based network accelerator. It's designed to optimise network traffic over point-to-point, partially-meshed and full-meshed IP networks.
    The goal of OpenNOP is to increase network performance over low speed network connections such as ISDN, DSL, DS1, frame-relay, VPN and other network circuits. To accomplish this we can use a variety of techniques such as compression, deduplication, caching and protocol spoofing.
    The objectives for OpenNOP are:
    Produce a low cost solution to increase network performance, improve the end user experience and deliver this in a easy to use appliance image.
    Provide a single solution for networks on terrestrial, cellular and satellite systems.
    Facilitate an open framework that can be extended by 3rd party modules to improve specific network traffic.
  • Deon’s World – Understanding and using htop to monitor system resources – Every so often there will be something that slows a system down. There are a few tools that can help to identify which process is the cause of this slow down. One such tool is htop. Htop is an interactive and real time process monitoring application for Linux which will show you your usage per cpu/core, as well as a meaningful text graph of your memory and swap usage.

Bookmarks for 27 dic 2012 through 28 dic 2012

These are my links for 27 dic 2012 through 28 dic 2012:

  • SyBooks Online: Back Up Data to a New Table (on sybase 12.x) – Copy the data from the corrupted table into a new table by creating a dummy table, and copying the old data into the dummy table.
  • Netl33ts: Cisco VPN Troubleshooting Guide – It is important to understand how IPSEC works in order to understand how to troubleshoot a VPN connection. This is a quick overview of IPSEC and is by no means a complete detailed guide.
  • TunnelsUP: Home – Welcome to tunnelsup.com! This site aims to document how to set up, troubleshoot and understand everything to do with Cisco VPN concepts. Here you will find scripts for putting together a tunnel, troubleshooting tips and videos that will teach concepts and demonstrate various VPN technologies.

Bookmarks for 20 dic 2012 through 21 dic 2012

These are my links for 20 dic 2012 through 21 dic 2012:

  • ROOTVG.NET AIX Hints and Tips – Frequently Asked Questions (FAQ) from the AIX User and System Administrator Courses.
  • http://archive.rootvg.net/adminquickref.htm – Quick Reference Administering AIX V5.2 version 1.0
  • MaxClients, MaxKeepAliveRequests e KeepAliveTimeout: ottimizzazione di Apache HTTP Server | Panix websiting – Oggi sappiamo quanto sia importante la velocità di caricamento della pagina sia in termini di usabilità ed user experience, sia in termini SEO, in quanto i motori di ricerca hanno inserito la velocità di caricamento delle pagine nei loro algoritmi di ranking.

    Di recente ho avuto modo di lavorare sull'ottimizzazione di un server web, ed è interessante notare come sia possibile ottenere ottimi risultati intervenendo su tre semplici parametri di configurazione del web server Apache:

    MaxClients
    MaxKeepAliveRequests
    KeepAliveTimeout
    parametri la cui importanza è spesso sottovalutata e che non sempre garantiscono le migliori prestazioni alle loro impostazioni di default.