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Snapping Again

Posted 06-02-2010 at 10:41 AM by brianL

Back in the early '80s, photography was my main hobby,including developing and printing. Black and white mostly, because monochrome prints were said to last longer than colour. After two or three years I lost interest in it. But now I've moved into the 21st century, and got round to buying a digital camera, a Sony DSC H55. A compact with quite a lot of features (must RTFM soon!).
I gave it a bit of a test run, using one of the easy "point & shoot" modes in the local cemetery....
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File Type: jpeg ACW_grave.jpeg (79.4 KB, 10 views)
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Shortest command to calculate the sum of a column of output

Posted 06-02-2010 at 06:27 AM by bittner (Notes on Linux)

I had to calculate the Installed-Size for a .deb control file recently. Here is the solution I came up with:

dpkg-deb -c mypackage.deb | sed -e 's/.*root\s*//' -e 's/\s*2010-.*$//' | xargs | tr ' ' + | bc
What it does? The code tries to construct a calculation string and feeds it to the command line calculator bc as follows:
  1. use dpkg-deb to get the file size information out of the Debian package
  2. sed away all characters before and after the
LQ Newbie
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This is a good restore function too.

Posted 06-02-2010 at 03:43 AM by GlennsPref

I've noticed that this can be used to reinstall a list from


echo "run rpm -qa | sort | less > /home/glenn/build/note-rpm-installed-list-`date +%Y-%m-%d-%H`.txt, maybe upto 15kb text."/n
sudo rpm -qa | sort | less > /home/glenn/build/note-rpm-installed-list-`date +%Y-%m-%d-%H`.txt
this produces a list, but top-down, no spaces or dashes.

It still works with the code here, just has no...
Senior Member
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Another good example of you know what

Posted 06-01-2010 at 11:14 PM by AGer (Void cries or bashing time)

I am a subscriber to the Linux Today newsletter. Apparently Linux Today outsourced mailing the newsletter since the links to Web pages in it look like

Sometimes this works, sometimes I get the following in the browser
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Howto build your own Debian repository

Posted 06-01-2010 at 05:04 AM by bittner (Notes on Linux)
Updated 06-07-2010 at 07:08 AM by bittner (added reference (background reading))

If you write software for Linux and you write them for Debian systems (Debian, Ubuntu, and others) you may want to provide your software as .deb installation packages. And one day eventually you will want to set up a repository so others can download and install your software without fuzz.

If you look at a Debian mirror (e.g. you will find out one day that packages and meta information is split up into two main directories on the root level:
  • dists
LQ Newbie
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