geekism and nerdism

Bookmarks for 24 lug 2012 from 12:40 to 14:51

These are my links for 24 lug 2012 from 12:40 to 14:51:

  • Centrale di Mobilità – Muoviti responsabilmente senza pesare sull'ambiente
  • www.vanheusden.com – AIX tips & tricks – AIX tips & tricks

    (like: "Finding physical location of a disk" or why "AIX NFS server refuses client to mount share" and many other)

  • Account Administration – disciplinux – Change AIX password non-interactively

        Use the chpasswd utility to change the password.

  • Tightening Default AIX Sendmail – disciplinux – I started looking at the default AIX configuration of sendmail for the SMTP Open Relay issues. Previously I had sent a configuration change to
    allow only specific relay-domains. However, it appears that the default sendmail configuration sets "PROMISCUOUS_RELAY" which overrides the
    RELAY-DOMAINS directive.
  • Configure sendmail to start logging Subject in maillog | www.linux4beginners.info – In this article we will learn how to configure sendmail so that you can log "Subject" in /var/log/maillog as by default sendmail does not log Subject to maillog file.

    This is really interesting. Business people many times are interested in getting mail log files analyzed. To analyse mail logs they need various field to appera in mail logs. e.g. "From", "To", "Subject" etc from the sent email. By default sendmail logs From and To fields but it does not log Subject field. In this article you will learn how to enable sendmail to log "Subject".

Bookmarks for 23 lug 2012 from 15:38 to 17:02

These are my links for 23 lug 2012 from 15:38 to 17:02:

  • Graphvis visualisation of Nagios Config – Nagios Exchange – Graphvis visualisation of complex Nagios configs.
    I have written a couple of utilities one to walk a nagios config tree and turn it into a perl hash (called nagparse)and another to use that hash converting the tree into a graphvis directed graph (called graphit). These are then brought together with a CGI program called explorenagios that lets you select what parts of the config to graph. If you have a non trivial config then showing it ALL in one graph is not fun!

    You can use the two component programs on the command line too – and feed the output into dot (it has been optomised to make nice dot graphs) or one of the other engines like neato if you want to do some hacking of the output options.

    It is now useful enough to be worth sharing. Not prefect yet but useful. Surprisingly fast.

  • Findafont – Find a Font
    Information about how to find a font you're looking for
  • Switching from Red Hat Network to Unbreakable Linux Network (ULN) – This document describes how to connect to the Oracle Unbreakable Linux Network (ULN) to obtain software updates. It outlines the steps needed to switch a server installed with Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 5, Red Hat Enterprise Linux version 4 or Red Hat Enterprise Linux Server version 3, Update 8 or Update 9 from Red Hat Network(RHN) to Unbreakable Linux Network(ULN).

Bookmarks for 23 lug 2012 from 14:20 to 14:37

These are my links for 23 lug 2012 from 14:20 to 14:37:

  • Nagrestconf README – What is Nagrestconf?
    Nagrestconf is a REST interface and configuration GUI for Nagios.
    Nagrestconf is written in Bash and PHP.
    Specifically, Nagrestconf:
    allows Nagios configuration files to be written using a REST api.
    allows the server to be restarted using the REST api.
    provides a configuration Web GUI built on the REST api.
    It can be useful for:
    Bulk loading
    Bulk editing
    Automation
    Catching common configuration mistakes
    Configuration Delegation (using additional tools)
    Distributed monitoring (using additional tools)
    Not all of the Nagios directives are implemented, refer to the Status section.
  • Oracle Linux: A better alternative to CentOS – We firmly believe that Oracle Linux is the best Linux distribution on the market today. It's reliable, it's affordable, it's 100% compatible with your existing applications, and it gives you access to some of the most cutting-edge innovations in Linux like Ksplice and dtrace.

    But if you're here, you're a CentOS user. Which means that you don't pay for a distribution at all, for at least some of your systems. So even if we made the best paid distribution in the world (and we think we do), we can't actually get it to you… or can we?

    We're putting Oracle Linux in your hands by doing two things:

    We've made the Oracle Linux software available free of charge
    We've created a simple script to switch your CentOS systems to Oracle Linux
    We think you'll like what you find, and we'd love for you to give it a try.

  • configure time service on AIX host – Waldemar Mark Duszyk – First, you have to decide/select the appropriate devices to be your time providers. It could be one or more “official/public” time servers or maybe your routers. When you decide what these servers are you should validate that they deliver what you need and that you are (your host) is capable to receive and use what is delivered.

Bookmarks for 19 lug 2012 through 20 lug 2012

These are my links for 19 lug 2012 through 20 lug 2012:

  • Mail server statistics – The statistics are based on completely anonymous information and were performed using randomly chosen IP addresses. When connecting to a mail server defined as an MX in the domain configuration, it can reply in a different number of ways. It may not be online, or may be refusing connections. Also, it is possible that the server does not respond back with a "220" line within the period of time we wait, nor provide a banner that identifies the type of the software running on it, at all times.
  • Setting up backup mail exchange server with sendmail « Building systems that WORK – Setting up backup mail exchange server with sendmail

    Most systems admin is used to setting up the primary mail server, but many of them (like me) are not used to setup a backup mail server in a regular basis. This is my attempt to create a complete document on setting up a backup mail server and testing it for the dooms day. […]

  • Migrate website content using ssh + tar (quick and easy) « my two cents – There are times when you cannot create an intermediate tarball when moving your website due to lack of disk space. There are other times when you wanna be smart

Bookmarks for 18 lug 2012 through 19 lug 2012

These are my links for 18 lug 2012 through 19 lug 2012:

  • Generate large amount of test data « my two cents – I’m using the dictionary on linux systems to generate test data. The shell script below generates test data for MySQL, but similar concepts can be used for other database systems as well.
  • JQueryin | Switching Apache from Prefork to Worker MPM in RHEL / CentOS 5.x / Fedora 13 – I’m going to outline the process of switching from Apache’s default installation of MPM Prefork to that of MPM Worker. I will also be covering the proper installation of FastCGI (mod_fcgid) to further improve your server performance. This guide is ideally intended for individuals running on low-memory VPS servers as memory consumption will likely be far lower with the Worker MPM because it spawns threads as opposed to forking child processes. If you’re intentionally reading this article, you’re probably aware of the performance benefits gained.
  • Free PDF Reader – Sumatra PDF – Sumatra PDF is a free PDF, eBook (ePub, Mobi), XPS, DjVu, CHM, Comic Book (CBZ and CBR) reader for Windows.

    Sumatra PDF is small, portable and starts up very fast.

    Simplicity of the user interface has a high priority.

Bookmarks for 12 lug 2012 through 17 lug 2012

These are my links for 12 lug 2012 through 17 lug 2012:

  • MobaXterm-Plugins – bananahut.net – This page contains a few third-party MobaXterm plugins that I packaged myself. MobaXterm is an enhanced terminal for Windows build on top of cygwin. It is self-contained and doesn't require installing or managing a ton of dependencies and things like Cygwin.
  • Mirrorvg without locking the volume group – AIX Health Check – When you run the mirrorvg command, you will (by default) lock the volume group it is run against. This way, you have no way of knowing what the status is of the sync process that occurs after mirrorvg has run the mklvcopy commands for all the logical volumes in the volume group. Especially with very large volume groups, this can be a problem.

    The solution however is easy: Make sure to run the mirrorvg command with the -s option, to prevent it to run the sync. Then, when mirrorvg has completed, run the syncvg yourself with the -P option.

  • Tassonomie che funzionano in 10 passi | Intranet Management – […] un bellissimo poster, pubblicato su Green chamaleon, che descrive graficamente, dall’inizio alla fine, lo sviluppo di una tassonomia […]

Bookmarks for 9 lug 2012 through 10 lug 2012

These are my links for 9 lug 2012 through 10 lug 2012:

Bookmarks for 5 lug 2012 through 6 lug 2012

These are my links for 5 lug 2012 through 6 lug 2012:

  • NetHogs: What program is using that bandwidth? – NetHogs is a small 'net top' tool. Instead of breaking the traffic down per protocol or per subnet, like most tools do, it groups bandwidth by process. NetHogs does not rely on a special kernel module to be loaded. If there's suddenly a lot of network traffic, you can fire up NetHogs and immediately see which PID is causing this. This makes it easy to indentify programs that have gone wild and are suddenly taking up your bandwidth.

    [ via http://www.zarrelli.org/ ]

  • LiveUSB image with OpenBSD – carry your OS on a memory stick – It is trivial to a create a bootable USB stick with OpenBSD. I wanted to create one and realized that this will be of general use for anyone who likes a UNIX USB memory stick that they can carry with them on a keychain.

    If you wish to have LiveCD/LiveDVD instead, please refer to our other LiveCD-OpenBSD project on sourceforge!

    This USB image shall not touch your hard disk in any way. All the operations are done in the USB stick and main memory. Nothing will be written to your MBR or boot loaders!

  • Jon Hart’s Blog: OpenBSD on Soekris — A Cheater’s Guide – Below are the steps I recently used to get my NET4801 running OpenBSD 4.2 -current. The difference here is that I use qemu to make use of the considerably faster CPU on my desktop to breeze through the install and initial configuration.

Bookmarks for 2 lug 2012 through 5 lug 2012

These are my links for 2 lug 2012 through 5 lug 2012:

  • [Soekris] Cloning a bootable CF – I've done this a few times on FreeBSD when CF sizes don't match and have found the following sequence to work swimmingly:
  • Clean-MailboxDatabase: Exchange 2007 Help – Use the Clean-MailboxDatabase cmdlet to scan the Active Directory directory service for disconnected mailboxes that are not yet marked as disconnected in the Microsoft Exchange store and update the status of those mailboxes in the Exchange store. This cmdlet is not able to update the Exchange store unless the Microsoft Exchange Information Store service is running and the database is mounted.

    [ Microsoft Sucks !!! ]

  • Gainframe – A computer company that gets the open source community

Bookmarks for 1 lug 2012 through 2 lug 2012

These are my links for 1 lug 2012 through 2 lug 2012:

  • exljbris Font Foundry – Well crafted (free) fonts by Jos Buivenga
    Welcome to Jos Buivenga's exljbris Font Foundry. Here you can find my [free] fonts.
    Delicious, Fontin, Fontin Sans, Tallys, Fertigo Pro, Diavlo, Anivers, Museo, Museo Sans, Museo Sans Rounded, Museo Slab, Calluna, Calluna Sans & Geotica.

    What's in this difficult to read and pronounce name? An ex libris is a label bearing the owner's name that is pasted usually on the inside cover of a book. My initials are ljb, so I that's how I came to my label: exljbris.

    [ via fullo ]

  • Tomato Firmware | polarcloud.com – Tomato is a small, lean and simple replacement firmware for Linksys' WRT54G/GL/GS, Buffalo WHR-G54S/WHR-HP-G54 and other Broadcom-based routers. It features a new easy to use GUI, a new bandwidth usage monitor, more advanced QOS and access restrictions, enables new wireless features such as WDS and wireless client modes, raises the limits on maximum connections for P2P, allows you to run your custom scripts or telnet/ssh in and do all sorts of things like re-program the SES/AOSS button, adds wireless site survey to see your wifi neighbors, and more.

    [ via: https://twitter.com/mrfabbri/statuses/218321670593716225 ]

  • Converting Windows Guests From VMWare ESX to KVM With Virtio Drivers | Backdrift – The below steps were tested while pulling my hair out trying to migrate a Windows 2k3 guest from VMWare ESX to KVM managed by libvirt, hopefully this will save you from much windows related pain and suffering.