redhat

Bookmarks for 23 lug 2015 from 17:27 to 17:47

These are my links for 23 lug 2015 from 17:27 to 17:47:

  • How to fix yum errors on CentOS, RHEL or Fedora – Xmodulo – Yum is a package management tool for installing, updating and removing rpm packages on RedHat-based systems. When you try to install a package with yum command, you may encounter errors for various reasons. In this post, I will describe under what situations yum errors can occur, and explain how to fix yum errors.
  • Docs/RpmRecovery – rpm – Trac – This document provides an overview of how to deal with RPM database corruption.
  • RepoCreate – yum – Trac – Sometimes you'll find you need to be able to collect a bunch of rpm packages you have together in one place and you want to make them available to your systems running yum. It is pretty easy to do.
  • Local YUM fun | Adamish | Blog – If you’re installing redhat on a machine without Internet access you may wish to setup a local YUM repository for extra bits and pieces after the main install. Add the following to /etc/yum.repos.d/local.repo. If there are any other .repo files in /etc/yum.repos.d then comment out their contents. Make sure you don’t have spaces in your baseurl.
  • How to fix yum [Errno -1] Metadata file does not match checksum › Backdrift Backdrift – I recently upgraded my local yum repository server to RHEL6. After upgrading I noticed the below error when my el5 clients would attempting to install packages from the local repo with yum.

Bookmarks for 12 mag 2015 through 15 mag 2015

These are my links for 12 mag 2015 through 15 mag 2015:

  • slack for ubuntu – ScudCloud is a non official open-source Linux (Debian, Ubuntu, Kubuntu, Mint, Arch) desktop client for Slack©. Slack© is a platform for team communication. ScudCloud uses the QT library + Webkit to render the web version of Slack, but using the QWebkit-Native bridge to improve desktop integration with: multiple teams support, native system notifications, count of unread direct mentions at launcher/sytray icon, alert/wobbling on new messages, channels quicklist (Unity only), optional "Close to Tray".
  • How to create an RPM package – FedoraProject – This page describes in detail how to create an RPM package, and in particular, how to create a SPEC file. Unlike other RPM guides, this page explains the specifics for Fedora with links to Fedora-specific guidelines. Since it is maintained through the Fedora Wiki, it is likely to be more up-to-date than other guides. Despite the focus on Fedora, most of this document does apply to other RPM-based distributions.
  • How To Install Elasticsearch, Logstash, and Kibana 4 on CentOS 7 | DigitalOcean – In this tutorial, we will go over the installation of the Elasticsearch ELK Stack on CentOS 7—that is, Elasticsearch 1.4.4, Logstash 1.5.0, and Kibana 4. We will also show you how to configure it to gather and visualize the syslogs of your systems in a centralized location. Logstash is an open source tool for collecting, parsing, and storing logs for future use. Kibana 4 is a web interface that can be used to search and view the logs that Logstash has indexed. Both of these tools are based on Elasticsearch.

Bookmarks for 24 ott 2014 through 27 ott 2014

These are my links for 24 ott 2014 through 27 ott 2014:

  • VimSwitch: Use Your Vim Settings Everwhere – So you've customized vim just the way you want it. But as soon as you jump on a remote machine or a friend's PC, you lose all your settings. Well fear no longer! VimSwitch is here to save the day. VimSwitch makes it easy to switch to your vim profile on any machine. As long as you have your vim settings up on GitHub (For example: priomsrb/vimrc), switching to it is as easy as: # ./vimswitch priomsrb/vimrc When you're done, you can restore your previous vim settings with: # ./vimswitch default [ via http://onethingwell.org/post/100747819722/vimswitch ]
  • The Deploy vs Deployers directory, JBoss v5.x – JBoss ships with a few configurations that are meant to provide examples of how JBoss can be configured for your environment. It’s recommend you take the “default” configuration (or “all” if you require clustering), and then slim it down by removing the various mbean components found in the “jboss/server//deployers” and “jboss/server//deploy” folders until only your minimum requirements are met.
  • Kylin OLAP Engine for Big Data | Home – Kylin is an open source Distributed Analytics Engine from eBay Inc. that provides SQL interface and multi-dimensional analysis (OLAP) on Hadoop supporting extremely large datasets

Bookmarks for 28 mar 2014 through 29 mar 2014

These are my links for 28 mar 2014 through 29 mar 2014:

  • LDAP org chart | bitcube.co.uk – For centralised authentication and authorisation, LDAP is the de-facto standard. Whether in its pure form on Unix or in Active Directory guise on Windows, everyone uses it. What many people don't realise is that you can store all sorts of useful (and not so useful) information in LDAP. One field which can be useful is the "manager" attribute. One of our customers use that and so we've written a small script to graph it using the excellent Graphviz tool. It will probably need customising for specific cases, however we hope that people find it useful nonetheless. If you want to alter the output, do have a look at the record format documentation.
  • Puppet errors explained | bitcube.co.uk – Puppet is a wonderful system automation tool, however the learning curve can be a little steep. We've collected some of the errors messages and "strange" behaviour you may come across together with explanations to help overcome these hurdles and boost adoption of this fabulous tool. If you have any useful errors and explanations, please do send them in and we'll update this article.
  • SCAP: Guide To The Secure Configuration of Red Hat Enterprise Linux 5 – This guide has been created to assist IT professionals, in effectively securing systems with Red Hat Enterprise Linux 5.
  • DNS Load Balancing and Using Multiple Load Balancers in the Cloud – […] Load balancing in general is a complicated process, but there's some secret sauce in managing DNS along with multiple load balancers in the cloud. It requires that you draw from a few different sets of networking and “cloudy” concepts. In this second article in my best practices series (my first post covered how to use credentials within RightScale for storing sensitive or frequently used values), I'll explain how to set up load balancers to build a fault-tolerant, highly available web application in the cloud. Here's what you’ll need: Multiple A records for a host name in the DNS service of your choice Multiple load balancers to protect against failure […]
  • gdnsd – gdnsd is an Authoritative-only DNS server which does geographic (or other sorts of) balancing, redirection, weighting, and service-state-conscious failover at the DNS layer. gdnsd is written in C using libev and pthreads with a focus on high performance, low latency service. It does not offer any form of caching or recursive service, and notably does not support DNSSEC. There's a strong focus on making the code efficient, lean, and resilient. The code has a decent regression testsuite with full branch coverage on the core packet parsing and generation code, and some scripted QA tools for e.g. valgrind validation, clang-analyzer, etc. The geographically-aware features also support the emerging EDNS Client Subnet draft for receiving more-precise network location information from intermediate shared caches.

Bookmarks for 3 mar 2014 through 4 mar 2014

These are my links for 3 mar 2014 through 4 mar 2014:

  • Centos yum 404 repository errors | Natural Order Development – […] Basically yum ran through every single mirror and got nothing but 404 errors. I thought something might have gotten broken with yum or maybe the entire Internet changed overnight to a new repository layout (not likely but it has happened before). Well a simple Google for yum 404 led to some message threads that basically said yum's caches were out of data […]
  • Avoiding reboot: Resetting USB on a Linux machine – Every now and then, some USB device misbehaves badly enough to knock out the entire interface, to the extent that the system doesn’t detect any new USB devices. Or work so well with the existing ones, for that matter. The solution for me until now was to reboot the computer. But hey, I don’t like rebooting Linux!
  • AfterLogic WebMail Lite — free ajax webmail – Fast and easy-to-use webmail front-end for your existing IMAP mail server, Plesk or cPanel

Bookmarks for 6 ago 2013 through 8 ago 2013

These are my links for 6 ago 2013 through 8 ago 2013:

  • harelba/q · GitHub – Have you ever stared at a text file on the screen, hoping it would have been a database so you could ask anything you want about it? I had that feeling many times, and I've finally understood that it's not the database that I want. It's the language – SQL. SQL is a declarative language for data, and as such it allows me to define what I want without caring about how exactly it's done. This is the reason SQL is so powerful, because it treats data as data and not as bits and bytes (and chars). The goal of this tool is to provide a bridge between the world of text files and of SQL. q allows performing SQL-like statements on tabular text data.
  • rome2rio: discover how to get anywhere – Discover how to get anywhere by searching plane, train, bus, car and ferry routes [ via http://braindead.tumblr.com/post/57525353007 ]
  • WildFly – JBoss Application Server has a new name… WildFly. – JBoss Application Server has a new name… and it's even @#$%ing faster.

Bookmarks for 16 apr 2013 through 19 apr 2013

These are my links for 16 apr 2013 through 19 apr 2013:

  • Sequel Pro – Sequel Pro is a fast, easy-to-use Mac database management application for working with MySQL databases.
  • Squidblacklist.org’s Blacklists For Squid Proxy. – Squidblacklist.org is the worlds leading publisher of blacklists tailored for squid proxy. The data that we use to generate the blacklists that we offer is compiled from various sources including some of the top security researchers and threat mitigation organizations. We incorporate all of the best publicly available data, as well as aggregate from our own research. Then, the data is combined, parsed for dupes & errors, formatted for squid, ultimately the lists are tested and reviewed in a production environment before being published.
  • RDO – RDO is a community of people using and deploying OpenStack on Red Hat and Red Hat-based platforms. We have documentation to help get started, forums where you can connect with other users, and community-supported packages of the most up-to-date OpenStack releases available for download.

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 28 ago 2012 through 3 set 2012

These are my links for 28 ago 2012 through 3 set 2012:

  • Join di una macchina RHEL a un dominio Active Directory Windows e uso dei dischi condivisi dal dominio – Mia mamma usa Linux! – Questo documento descrive, in salsa cookbook, come realizzare il join di una macchina Red Hat Linux Server versione 6 ad un dominio Active Directory realizzato con Windows server 2003 o 2008.

    Segue una seconda parte che descrive come poter montare i dischi esposti da Windows ed usarli in scrittura e lettura.

  • Modern Perl – download ePub, HTML, Mobipocket – Perl.it – Modern Perl, scritto da chromatic è un libro sul linguaggio Perl adatto ai programmatori di tutti i livelli.

    Per chi si avvicina al linguaggio, il libro costituisce una introduzione a Perl aggiornata e moderna, che permette di prendere confidenza con il linguaggio utilizzandone gli strumenti e le metodologie sviluppate negli ultimi anni.

    Per il programmatore più esperto, Modern Perl costituisce un ideale aggiornamento su tutto quanto è stato introdotto con perl 5.12 e 5.14.

    Consulta oppure scarica il libro

  • TCP Port Scanner in Bash – good coders code, great reuse – I just had this quick idea to write a tcp port scanner in bash. Bash supports the special /dev/tcp/host/port file that you can read/write. Writing to this special file makes bash open a tcp connection to host:port. If writing to the port succeeds, the port is open, else the port is closed.

    [ Geeeeeeeeeeeeeeeeeeeeeeek 😀 ]

Bookmarks for 31 lug 2012 from 11:08 to 14:23

These are my links for 31 lug 2012 from 11:08 to 14:23:

  • VMweird | Tales from the Virtualization Crypt! – Tired of day-by-day activities, silly requests by customers, boring meetings?

    This website is right for you! It’s a meeting place for guys working in the Virtualization fields, to meet other like you and share the fun by telling your stories and have a laugh reading from others.

    [ via http://www.vuemuer.it/?p=3641 ]

  • Introduzione a GlusterFS: uno storage scalabile e distribuito – Mia mamma usa Linux! – GlusterFS è un file system open source distribuito e scalabile orizzontalmente, la cui capacità può essere dinamicamente espansa mediante l’aggiunta di nuovi nodi. GlusterFS è in grado di arrivare a gestire fino a diversi peta byte, migliaia di client e diverse aree dati (storage) organizzandole in blocchi che rende accessibili su Infiniband RDMA (remote direct memory access, fibra ottica) o connessioni TCP/IP.
    Le risorse “memoria e disco” vengono rese disponibili sotto un unico punto di condivisione e tali risorse possono essere montate dai client mediante tre diversi protocolli: CIFS, NFS od il client nativo Gluster.
    Questo articolo effettua una prova su strada di GlusterFS, introducendone i concetti e sperimentandone le funzionalità.
  • 800 Open Source Packages for AIX Ready for Downloading NOW (AIXpert Blog) – […] Instead of getting annoyed and complaining (like me), Michael decided to go and fix this short fall himself and a personal project and "give back" to AIX users world wide. So he compiles the open source packages on AIX and makes them freely available for download from:   http://perzl.org
       This website covers the AIX pre-compiled binaries for 800+ open source packages as RPM's and the other his hot project Ganglia for POWER, AIX and Power Linux […]
  • Variable Expansion | Variables and Parameters in the Korn Shell | InformIT – Variable expansion is the term used for the ability to access and manipulate values of variables and parameters. Basic expansion is done by preceding the variable or parameter name with the $ character. This provides access to the value.