Using ansible to deploy hosts

I've discovered ansible several weeks ago, but only decided to give it a real try the last two.

Test vehicle was the setup of icinga & check_mk on several hosts I wanted to monitor, along with the setup of the master monitoring server.

Some time ago I had already taken a …

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One more deception from Ubuntu

For my desktop, therre's some time I've left Ubuntu behind. I still use it on my servers, but I'm getting more and more deceived by those guys...

Last example : John the ripper not working.

The bug was filed 2012-10-26 and as of today is still not fixed - though I must …

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Generating huge quantities of random data

Before encrypting a disk it is recommended to fill it with random data to make prediction of encrypted blocks more difficult.

In practice this has become an issue with disks' capacity increasing - be it a SSD, with 120GB or a harddisk with 3TB : where to get such an amount of …

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Proftpd shutting down

Since the update of the rootserver to Ubuntu Saucy I've been experiencing strange shutdowns of proftpd. Logfiles only showed :

2013-12-29 06:25:27,355 zulu203 proftpd[18394] zulu203.server4you.de: ProFTPD killed (signal 15)
2013-12-29 06:25:27,457 zulu203 proftpd[18394] zulu203.server4you.de: ProFTPD 1.3.5rc3 standalone …
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Evaluating cherrytree

Well, Zim recently dropped data from notes. I think I traced it down that it didn't save the currently open note I was editing, so that upon shutdown the edits were lost.

Time for a new tool then. I had been evaluating basKet, which turns out to be a nice …

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Basket

I recently had a closer look at Microsoft OneNote 2010. Already took a look at it some time (years) ago, didn't convince me. 2010 release seems to be much more the way I expect it to be. Storage of data is still proprietary format of course, but at least it's …

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Ikiwiki and gitolite

Ikiwiki is meant to work with git, and is therefore basically compatible to gitolite.

One issue that pops up however is that files created by the gitolite user are not accessible by the apache webserver. And that's good so ! A bad solution would be to open up file access permissions …

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Mkinitcpio and missing firmware modules

While updating my arch Linux system today, I got following warnings :

        ==> WARNING: Possibly missing firmware for module: aic94xx
        ==> WARNING: Possibly missing firmware for module: bfa

Didn't know that I would need those modules (no Adaptec SAS nor Brocade Fibre Channel hardware). Google quickly revealed that the messages are …

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Incompetent usage of chmod

Once more I came across a script where people were setting access rights using 'chmod -R 777 .' (just saw it as "make sure we have all permissions on this file")

While this is a very pragmatic approach (in fact it fixes every access right issues), it's not the way it …

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Shutting down Qemu guest the correct way

Shutting down a Qemu guest from the command line can be quite easy if qemu was started with the -monitor option (eg : -monitor tcp:127.0.0.1:2023,server,nowait). One simply needs to connect to the port using telnet and issue a 'system_powerdown' command. Internally this will trigger …

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