Gregarius » mypapit gnu/linux blog » August 14, 2011

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  Vintage Ad: Steve Ballmer on Windows 1.0 operating system

  Posted: August 14th, 2011, 9:01pm MYT by mypapit

  Enjoy this advertisement from simpler days, about Microsoft Windows 1.0 — featuring Steve Ballmer

  
  

  
• 

  How to limit cpu usage for a process with cpulimit (Ubuntu / Debian server)

  Posted: August 14th, 2011, 6:51pm MYT by mypapit

  cpulimit is a tool that can be used to limit cpu usage (throttle cpu usage) for a single process (by its PID). cpulimit is useful to ensure that a single process would not hogs the cpu cycles, which can be use by other processes. cpulimit is different from ‘nice’ as it limits the real cpu usage for a process, while ‘nice’ controls scheduling priorities for a particular process.

  How to use cpulimit?
  Basic usage:

  cpulimit  -p [pid] -l [ cpu percentage]
  cpulimit -p 12345  -l 25
  

  Running cpulimit on background:

  cpulimit -p 12345  -l 25 -z -b
  

  Note: The cpu percentage is the same one as reported by the ‘top’ command.

  cpulimit can be installed from Ubuntu and Debian 6.0 (Squeeze) repository through apt-get. The official website of cpulimit is [limitcpu.sf.net]

  
  

  
• 

  Grake – a tool for scanning web pages for Youtube Video URL

  Posted: August 14th, 2011, 6:24pm MYT by mypapit

  grake is a command-line tool for scanning web pages for embedded Youtube video link. As a scanning tool, grake is meant to complement other tool that would accept Youtube URL as its parameter, notably cclive.

  Usage Example:

  # general command line example
  grake [YOUTUBE URL]
  

  # typical / normal use
  grake http://youtube.com/
  

  #output as json (for programmatic consumption)
  grake --json http://youtube.com/
  

  #tell cclive to download youtube urls from grake output
  
  grake http://youtube.com/ | cclive
  

  This of course require the latest release of cclive in order for the download example to work.