Commands by BeniBela (7)

  • This lists all files modified after calling some command using a temporal anchor.


    1
    touch .tardis; the command ; find . -newer .tardis; rm .tardis;
    BeniBela · 2015-10-15 19:18:54 2
  • Show the command line for a PID with ps


    3
    ps h -o %a 21679
    BeniBela · 2015-09-27 11:00:07 2
  • The ebay URL is the search query copied from the browser (here searching for bed stuff). The regex is for crap that should not be shown. Important is "Pickup only", which filters away all the things that cannot be shipped (a filter that cannot be done on Ebay's webpage). It will output the title and url for all matching items, for all pages of the search result. It also works for the German Ebay. Show Sample Output


    0
    xidel --quiet 'http://www.ebay.com/sch/Beds-Bed-Frames-/175758/i.html?_from=R40&_sac=1&_sop=15&_nkw=bed' -e 'css(".lvresult")[not(matches(., "Pickup only|BUILDING PLANS \(ONLY\)|PARTS LIST"))]/css(".lvtitle")/(.||": "||a/@href)' -f 'css("a.gspr.next")'
    BeniBela · 2015-09-24 12:11:13 0
  • This logs the titles of the active windows, thus you can monitor what you have done during which times. (it is not hard to also log the executable name, but then it is gets too long) Show Sample Output


    2
    while true; do (echo -n $(date +"%F %T"):\ ; xwininfo -id $(xprop -root|grep "ACTIVE_WINDOW("|cut -d\ -f 5) | grep "Window id" | cut -d\" -f 2 ) >> logfile; sleep 60; done
    BeniBela · 2015-09-23 23:00:14 13
  • This says if the LHC has destroyed the world. Run it in a loop to monitor the state of Earth. Might not work reliable, if the world has actually been destroyed. Show Sample Output


    1
    xidel --quiet http://www.hasthelhcdestroyedtheearth.com/ -e //span
    BeniBela · 2015-09-23 12:31:55 1
  • This says if the LHC has destroyed the world. Run it in a loop to monitor the state of Earth. Might not work reliable, if the world has actually been destroyed. Show Sample Output


    1
    curl -s http://www.hasthelhcdestroyedtheearth.com/ | sed -En '/span/s/.*>(.*)<.*/\1/p'
    BeniBela · 2015-09-23 12:30:31 2
  • Updated to the new version of the MW webpage (seems MW does not use cougar anymore, so the other commands do not work nowadays), and using Xidel to parse the page with a html parser instead regex. Example usage: pronounce onomatopoetic I'm not sure how well Xidel works with binary streams (although it seems to work great in tests), so using wget to download the actual wav file might be safer, i.e.: pronounce(){ wget -qO- $(xidel "http://www.m-w.com/dictionary/$*" -f "replace(css('.au')[1]/@onclick,\".*'([^']+)', *'([^']+)'.*\", '/audio.php?file=\$1&word=\$2')" -e 'css("embed")[1]/@src') | aplay -q;} Xidel is not a standard cli tool and has to be downloaded from xidel.sourceforge.net


    0
    pronounce(){ xidel "http://www.m-w.com/dictionary/$*" -f "replace(css('.au')[1]/@onclick,\".*'([^']+)', *'([^']+)'.*\", '/audio.php?file=\$1&word=\$2')" -f 'css("embed")[1]/@src' --download - | aplay -q;}
    BeniBela · 2013-04-18 13:03:16 0

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File rotation without rename command
Rotates log files with "gz"-extension in a directory for 7 days and enumerates the number in file name. i.e.: logfile.1.gz > logfile.2.gz I needed this line due to the limitations on AIX Unix systems which do not ship with the rename command.

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" }

Simple XML tag extract with sed
Limited, but useful construct to extract text embedded in XML tags. This will only work if bar is all on one line. If nobody posts an alternative for the multiline sed version, I'll figure it out later...

Find usb device
I often use it to find recently added ou removed device, or using find in /dev, or anything similar. Just run the command, plug the device, and wait to see him and only him

Cheap iftop
Shows updated status in a terminal window for connections to port '80' in a human-friendly form. Use 'watch -n1' to update every second, and 'watch -d' to highlight changes between updates. If you wish for status updates on a port other than '80', always remember to put a space afterwards so that ":80" will not match ":8080".

convert strings toupper/tolower with tr

cat a file backwards
Or "tail -r" on Solaris.

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.

Jump up to any directory above the current one
Usage: upto directory

Write comments to your history.
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.


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