trk7's blog

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Illustration of a bird flying.
  • My First Android App

    More info here: Graph Muni I wrote an Android client to view Munin Graphs. Please check it out.

    April 20, 2013
  • missing scheme in email body url

    Some mail service providers (Yahoo Mail exhibits this at the moment), do not like links that do not have a scheme(http/https for instance) and will make the link non-clickable by removing the href. The fix is simple: Google Google

    February 18, 2013
  • how to not run a cron job between certain datetimes

    Say, I have a cron job entry and do not want the job to run between 2013-02-01 9PM (Feb 1st 2013) and 2013-02-02 11AM (Feb 2nd 2013), this is one possible solution (in crontab).

    February 2, 2013
  • rsync only certain files

    Create a file on on the origin server and use the –files-from option cd / rsync -anvi –files-from=/tmp/only_these_files . to-server:/ cat /tmp/only_these_files /srv/www/mysite/uploaded_files/9a3d3d9046aaad4bbe3074d794a6adaf.jpg /srv/www/mysite/uploaded_files/5ca1c97efd730427f846e457bd0a0667.png /srv/www/mysite/uploaded_files/5b0923025b4a1fde3a34119bfcd56567.jpg /srv/www/mysite/uploaded_files/870ed45d9ad704deace8fb541242425a.jpg

    September 13, 2012
  • Starting KVM guest after memory change

    After a memory module was taken out the system, the KVM guest was failing to start complaining about insufficient memory. Editing the domain XML file (in /etc/libvirt/qemu on Debian) to use less RAM and then trying to start the guest did not work. I had to do this: libvirt-bin restart for the the updated XML…

    August 19, 2012
  • WordPress + Nginx + Permalinks Rewrite rules

    The following works for me: I have my blog here: http://www.trk7.com/blog/and my permalink structure is: /%postname%/

    May 13, 2012
  • Bella donna

    Bella donna won’t be tamed Belluci, however, is unconcerned about what her children might think of her movies. ”If you are scared about what people think or what you represent or what your image can be, then you are not free any more in your choices. That can be dangerous for your art. I think…

    September 26, 2011
  • Backgrounded PHP jobs in ‘STOPPED’ state

    This could be specific to the PHP package from Ubuntu. Please consider the following a disclaimer. $ php -v PHP 5.3.5-1ubuntu7.2 with Suhosin-Patch (cli) (built: May 2 2011 23:00:17) Copyright (c) 1997-2009 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2010 Zend Technologies with Xdebug v2.1.0, Copyright (c) 2002-2010, by Derick Rethans $ cat /etc/lsb-release…

    September 21, 2011
  • Parrallel processing from the bash commandline

    for i in `seq 1 40`; do echo $i; /tmp/script.sh >> /tmp/script.out 2>&1 & done Note the lack of ‘;’ before ‘done’. The ‘&’ indicates the end of the statement.

    September 20, 2011
  • Checking for the existence of domains from commandline in Bash

    while read line; do wget –quiet –spider –timeout=10 $line; if [ $? -ne 0 ]; then echo $line; fi; done < "/tmp/domains.txt" /tmp/domains.txt would hold the list of domain names separated by newline. Note this is just a quick hack and not entirely reliable.

    June 16, 2011
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