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2011-03-12 - Confoo 2011 presentation
Slides are available from the commandlinefu presentation at Confoo 2011: http://presentations.codeinthehole.com/confoo2011/
2011-01-04 - Moderation now required for new commands
To try and put and end to the spamming, new commands require moderation before they will appear on the site.
2010-12-27 - Apologies for not banning the trolls sooner
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Apologies for the delay in getting Twitter's OAuth supported. Annoying pagination gremlin also fixed.
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Commands by John_W from sorted by
Terminal - Commands by John_W - 10 results
while :; do acpi -t | osd_cat -p bottom ; sleep 1; done &
2011-01-14 13:57:45
User: John_W
Functions: acpi sleep
3

There is no need for variables. I also added sleep to reduce cpu usage, however I didn't test it.

find . -empty -type f -delete
yes '' | head -n100
ls /dev/disk/by-uuid/ -alh
xkcd() { wget -qO- http://xkcd.com/ | sed -n 's#^<img src="\(http://imgs.[^"]\+\)"\s\+title="\(.\+\?\)"\salt.\+$#eog "\1"\necho '"'\2'#p" | bash ; }
2010-08-25 15:44:31
User: John_W
Functions: bash sed wget
0

This function displays the latest comic from xkcd.com. One of the best things about xkcd is the title text when you hover over the comic, so this function also displays that after you close the comic.

To get a random xkcd comic use the following:

xkcdrandom() { wget -qO- http://dynamic.xkcd.com/comic/random | sed -n 's#^<img src="\(http://imgs.[^"]\+\)"\s\+title="\(.\+\?\)"\salt.\+$#eog "\1"\necho '"'\2'#p" | bash; }

These are just a bit shorter than the ones eigthmillion wrote, however his version didn't work as expected on my laptop for some reason (I got the title-tag first), so these build a command which is executed by bash.

sed -i 's/^\s\+//' <file>
rename 's/\b((?!(a|of|that|to)\b)[a-z]+)/\u$1/g' *
2010-08-22 15:00:33
User: John_W
Functions: rename
2

All words of the filenames except "a", "of", "that" and "to" are capitalized.

To also match words which begin with a specific string, you can use this:

rename 's/\b((?!hello\b|t)[a-z]+)/\u$1/g' *

This will capitalize all words except "hello" and words beginning with "t".

rename 's/\b([a-z])/\u$1/g' *
find ./ -name Thumbs.db -delete
dig +short @resolver1.opendns.com myip.opendns.com
2010-07-30 15:32:21
User: John_W
Functions: dig
9

Faster than the curl/wget-approaches.