@electronic{www.panix.com,
   title       = {GREP}, 
   url         = {http://www.panix.com/~elflord/unix/grep.html},
   biburl      = {https://puma.uni-kassel.de/url/450468e71eb87617b41173fe1a79257e/stephandoerfel},
   keywords    = {grep tutorial ubuntu},
   added-at    = {2011-08-11T11:51:35.000+0200},
   description = {},
   interhash   = {450468e71eb87617b41173fe1a79257e}, 
   intrahash   = {450468e71eb87617b41173fe1a79257e}
}