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print first n characters of any file in human readble form using hexdump
Usefull to determine unknown file type

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Send a local file via email
if "mail -a" fail, try "mutt -a" or "nail -a"

List only the directories
-d: list directory entries instead of contents, and do not dereference symbolic links

Terminal - Show directories in the PATH, one per line with sed and bash3.X `here string'
another method : awk '{gsub(/:/, "\n");print}'

Convert multiple flac files to mp3
make sure that flac and lame are installed sudo apt-get install lame flac

convert a web page into a pdf
This uses the "command-line print" plugin for Firefox (http://torisugari.googlepages.com/commandlineprint2). This same plugin can also produce PNGs. On *nix, the file must exist; therefore the touch bit in front. Also, firefox seems to ignore saved user preferences when "printing" this way (margins, header, footer, etc.), so I had to tweak my ~/.mozilla/firefox/xxxxxxxx.default/prefs.js file by hand. Yup, that's *prefs.js* not user.js - apparently, firefox ignores my user.js file too...

Convert entire audio library in parallel
Uses parallel processing Reiteration of my earlier command https://www.commandlinefu.com/commands/view/15246/convert-entire-music-library Usage lc Old_Directory New_DIrectory Old_Format New_Format lc ~/Music ~/Music_ogg mp3 ogg

Get sunrise and sunset times
This will get the sunrise and sunset times of a specific location. To be able to determine $l you need to first go to http://weather.yahoo.com/ and look up your location. The last numbers in the URL will be the $l Instead of forecastrss?w=$l you can also use forecastrss?p=$l and use the RSS link of the city you found. Also see http://developer.yahoo.com/weather/ for more information

Find commets in jpg files.
Finds comments in jpg files, but I can't figure out how to exclude (in output) files without comments.


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