Commands by sairon (7)

  • Generate a random password 30 characters long

    The pwgen program generates passwords which are designed to be easily memorized by humans, while being as secure as possible. Human-memorable passwords are never going to be as secure as completely completely random passwords. [from pwgen man page] Show Sample Output


    6
    pwgen 30 1
    sairon · 2011-07-24 19:43:48 6
  • ThePirateBay.org torrent search

    This one-liner greps first 30 direct URLs for .torrent files matching your search querry, ordered by number of seeds (descending; determined by the second number after your querry, in this case 7; for other options just check the site via your favorite web-browser). You don't have to care about grepping the torrent names as well, because they are already included in the .torrent URL (except for spaces and some other characters replaced by underscores, but still human-readable). Be sure to have some http://isup.me/ macro handy (someone often kicks the ethernet cables out of their servers ;) ). I've also coded a more user-friendly ash (should be BASH compatible) script, which also lists the total size of download and number of seeds/peers (available at http://saironiq.blogspot.com/2011/04/my-shell-scripts-4-thepiratebayorg.html - may need some tweaking, as it was written for a router running OpenWrt and transmission). Happy downloading!


    4
    wget -U Mozilla -qO - "http://thepiratebay.org/search/your_querry_here/0/7/0" | grep -o 'http\:\/\/torrents\.thepiratebay\.org\/.*\.torrent'
    sairon · 2011-04-15 15:01:16 32
  • Google dictionary of word definitions

    wget -qO - "http://www.google.com/dictionary/json?callback=dict_api.callbacks.id100&q=steering+wheel&sl=en&tl=en&restrict=pr,de&client=te" this does the actual google dictionary query, returns a JSON string encapsulated in some fancy tag sed 's/dict_api\.callbacks.id100.//' here we remove the tag beginning sed 's/,200,null)//' and here the tag end There are also some special characters which could cause problems with some JSON parsers, so if you get some errors, this is probably the case (sed is your friend). I laso like to trim the "webDefinitions" part, because it (sometimes) contains misleading information. sed 's/\,\"webDefinitions.*//' (but remember to append a "}" at the end, because the JSON string will be invalid) The output also contains links to mp3 files with pronounciation. As of now, this is only usable in the English language. If you choose other than English, you will only get webDefinitions (which are crap).


    1
    wget -qO - "http://www.google.com/dictionary/json?callback=dict_api.callbacks.id100&q=steering+wheel&sl=en&tl=en&restrict=pr,de&client=te" | sed 's/dict_api\.callbacks.id100.//' | sed 's/,200,null)//'
    sairon · 2011-03-08 15:00:39 17
  • SoX recording audio and trimming silence

    Records audio from your mic in FLAC (Free Lossless Audio Codec) format, starts only after it detects at least 0.1 seconds of noise and stops after 1 second of silence. You can adjust the percent values (sensitivity) to best fit your microphone and voice (0.1% if you have a great quality mic, higher if you don't, 0% does not trim anything). Useful for speech recognition in conjunction with my previous command titled 'Google voice recognition "API"' (http://www.commandlinefu.com/commands/view/8043/google-voice-recognition-api).


    1
    sox -t alsa default ./recording.flac silence 1 0.1 5% 1 1.0 5%
    sairon · 2011-03-08 14:36:39 5
  • Google text-to-speech in mp3 format

    EDIT: command updated to support accented characters! Works in any of 58 google supported languages (some sound like crap, english is the best IMO). You get a mp3 file containing your query in spoken language. There is a limit of 100 characters for the "q" parameter, so be careful. The "tl" parameter contains target language.


    37
    wget -q -U Mozilla -O output.mp3 "http://translate.google.com/translate_tts?ie=UTF-8&tl=en&q=hello+world
    sairon · 2011-03-08 14:05:36 24
  • Google voice recognition "API"

    The FLAC audio must be encoded at 16000Hz sampling rate (SoX is your friend). Outputs a short JSON string, the actual speech is in the hypotheses->utterance, the accuracy is stored in hypotheses->confidence (ranging from 0 to 1). Google also accepts audio in some special speex format (audio/x-speex-with-header-byte), which is much smaller in comparison with losless FLAC, but I haven't been able to encode such a sample. Show Sample Output


    3
    wget -q -U "Mozilla/5.0" --post-file speech.flac --header="Content-Type: audio/x-flac; rate=16000" -O - "http://www.google.com/speech-api/v1/recognize?lang=en-us&client=chromium"
    sairon · 2011-03-08 13:39:01 5
  • Google Translate

    substitute "example" with desired string; tl = target language (en, fr, de, hu, ...); you can leave sl parameter as-is (autodetection works fine) Show Sample Output


    5
    wget -U "Mozilla/5.0" -qO - "http://translate.google.com/translate_a/t?client=t&text=translation+example&sl=auto&tl=fr" | sed 's/\[\[\[\"//' | cut -d \" -f 1
    sairon · 2011-03-06 13:46:16 110

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Open a manpage in the default (graphical) web browser
An easy alias for opening a manpage, nicely HTML formatted, in your set internet browser. If you get a "command exited with status 3" error you need to install groff.

To create files with specific permission:

Dump audio from video without re-encoding.
This removes the video and subsequent file size and directly copies the audio.

Clean all .pyc files from current project. It cleans all the files recursively.

check for write/read permissions
su www-apache/ftp user and then check readable: find ~/ -type d \( -wholename '/dev/*' -o -wholename '/sys/*' -o -wholename '/proc/*' \) -prune -o -exec test -r {} \; -exec echo {} readable \; 2>/dev/null check writable: find ~/ -type d \( -wholename '/dev/*' -o -wholename '/sys/*' -o -wholename '/proc/*' \) -prune -o -exec test -w {} \; -exec echo {} writable \; 2>/dev/null

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

tar exclude files or directories
If you want to exclude only one file or directory you should use as --exclude=file_or_directory

Terrorist threat level text

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Count items in JSON array
Pipe any JSON to jq, then count with the appropiate expression and use the | length on the array

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