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Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.
Old

Append something to the top of a file, in bash, without a temporary file

Posted 09-21-2013 at 04:04 PM by the dsc (linux-related notes)
Updated 09-21-2013 at 04:06 PM by the dsc

Using echo "something" >> extantfile.wtv may be handy way to add something to a file, but it will only add to the end.

The closest thing one would more likely imagine to add something at the top would be something like combining echo/whatever and a cat into a temporary file, and then moving it into the old file. Or maybe something crazy with tac and rev.

But it's possible to skip the temporary file:

echo -e "$(grep -A 1 patternX source-of-bit-to-append)\n$(cat...
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Old

News: Konqueror file manager is as awesome as it was before

Posted 09-05-2013 at 05:44 PM by the dsc (linux-related notes)

KFM is the best filemanager known to man. It may not be obvious to many because the defaults don't fully exploit its potential. But once you tweak it, and get used to it, you realize that everything else comparatively sucks.

In recent updates it had some feature reversals, losing italics for symlinks on the "normal" file listing, the instant dir filter, and in-line renaming, but all these features are back again, in recent Debian testing updates.

The only...
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Old

Tip: creating symlinks to another folder

Posted 09-01-2013 at 08:46 PM by the dsc (linux-related notes)
Tags symlink

The syntax of "ln" requires full path information of the "source" file. Therefore, if you issue something like "for file in *.foo ; do ln -s ./$file /other-folder/somewhere/$(echo $file | sed s/foo/bar/) ; done", the produced symlinks will be empty.

To avoid that, the command must be:

for file in *.foo ; do ln -s $PWD/$file /other-folder/somewhere/$(echo $file | sed 's/foo/bar/') ; done

$PWD, the environment variable of the...
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