Hands On Exercise - GNU Tools Part 3

Scripting Examples:

• Unix Philosophy (at least the part that pertains to scripting):
  
  • make each program do one thing well.
  • expect the output of one program to become the input of another.
  • visit the basics of unix philosophy to learn more.
• sed:
  change all of the dates in a group of files

  $ sed -i.bak "s/05-05-2005/05-06-2005" *.dat

• find:
  change the permissions of all mp3 files:

  $ find -iname "*~" -exec "rm {}" \;

compress all files larger than 30MB:

$ find -size +30000k -exec "bzip2 {}" \;