Time for another update - yaydl 0.9.0a is now capable of reading URLs from STDIN, permitting shell commands like the following one:

yaydl.pl --stdin < file_containing_multiple_urls

Additionally, I fixed some minor bugs affecting the routines for vimeo/metacafe/google.

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In general, vim's auto backup function (:set backup) is a rather useful feature that saved me, or more precisely, some of my files several times. Nevertheless, all these files with an appended tilde, flooding your filesystem, are quite annoying. So, here's a way to get rid of all these files in one go:

#find all backup files in your home directory
find ~ -name "*~"
#find and delete all backup files in your home directory
find ~ -name "*~" -delete
#find all backup files and delete them only if the original files exist!
find ~ -name "*~" -exec bash -c '[ -e "${1%?}" ] && rm -f -- "$1";' _ {} \;

yaydl - yet another update... ;-) This version contains support for another video site - vimeo.com Have fun! UPDATE: version 0.8.9a provides support for video.google.com and includes some bugfixes.

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A new alpha-version of yaydl is available now. Downloading videos from youtube, myvideo and metacafe should work fine, whereas the support for clipfish is currently on hold. BTW: A final version will be released along with DNF ;-) UPDATE: I've just finished my work on version 0.8.7a - everything should be working fine again. :-)

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If you're using dhttpd you might have noticed, that it sends the wrong http-headers for svg(z)-files. ;) To fix this problem, all you need to do is apply the patch linked below.

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Here are 2 ways, to determine your public IP address using curl, sed and grep. I recommend using the second one.

curl -s www.wieistmeineip.de | grep class=\"ip\" | sed -r 's#(.*>)(.*)(<.*)#\2#'
curl -s checkip.dyndns.org | sed -r 's#(.*: )([0-9.]*)(<.*)#\2#'

Most perl scripts I write start like this:

#!/usr/bin/perl
use strict;
use warnings;
#maybe the GPL or some other stuff...

Additionally it's always required to set the "x flag" via chmod - all in all quite annoying. That's why I added the function shown below to my ~/.bashrc

np() {
    gplfile=~/Dokumente/gpl.txt
    if [ $# -eq 0 ]
    then
        echo "filename required..."
        return
    fi
    if [ -e "$1" ]
    then
        echo "file already exists!"
        return
    fi
    touch "$1" || { echo "can't touch $1" ; return ; }
    echo "#!/usr/bin/perl" >> "$1"
    if [ "$2" = "gpl" ] && [ -e "$gplfile" ]
    then
        cat "$gplfile" >> "$1"
    fi
    echo "" >> "$1"
    echo "use strict;" >> "$1"
    echo "use warnings;" >> "$1"
    echo "use 5.10.0;" >> "$1"
    echo "use feature 'say';" >> "$1"
    echo "" >> "$1"
    chmod 700 "$1"
    [ $EDITOR ] || EDITOR=vim
    $EDITOR "$1"
}

Usage: np filename [gpl]

Put the following in your ~/.bashrc

up() {
    if [ $# == 0 ]
    then
        cd ..
        return
    fi
    if [ "${1//[^0-9]/}" != "$1" ]
    then
        echo "Not a number"
        return
    fi
    STRING=""
    for (( i=0; i<$1 ; i++ ))
    do
        STRING="$STRING../"
    done
    cd $STRING
}

up is equivalent to cd .. and up N jumps up N directories in the directory tree.

Some weeks ago, my laptop suddenly turned off, because its battery was completely flat. To prevent this from happening again, I wrote a small script that notifies me, when a critical charge state is reached. Additionally it shuts the computer down before the battery does. ;-) Please note that this isn't meant to be a general purpose solution, so feel free to adapt it to your own needs.

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