title: How to move old file to another folder
body: <p>in my folder I have file which suffix is date when this file was created for example:
  file.log2012-08-21, file.log2012-08-20 ... Now how I can move file which is older then 2012-08-20 ? I know how I can do this day by day: <code>mv file.log2012-08-19 /old/</code> but I dont know when to stop ... is there some parameter in command mv to do this easier ?</p>