====== Rename Skript ======
Benutzung:
renna p [prefix] files.."
renna s [suffix] files.."
renna r [expression] [replacement] files..

[[http://www.faqs.org/docs/Linux-HOWTO/Bash-Prog-Intro-HOWTO.html#ss12.3|Quelle]]
===== Code =====
<code bash>
 #!/bin/sh
 # renna: rename multiple files according to several rules
 # written by felix hudson Jan - 2000

 #first check for the various 'modes' that this program has
 #if the first ($1) condition matches then we execute that portion of the
 #program and then exit

 # check for the prefix condition
 if [ $1 = p ]; then

 #we now get rid of the mode ($1) variable and prefix ($2)
prefix=$2 ; shift ; shift
 # a quick check to see if any files were given
 # if none then its better not to do anything than rename some non-existent
 # files!!
  if [$1 = ]; then
      echo "no files given"
      exit 0
   fi
 
 # this for loop iterates through all of the files that we gave the program
 # it does one rename per file given
   for file in $*
     do
     mv ${file} $prefix$file
   done
 
 #we now exit the program
   exit 0
 fi
 
 # check for a suffix rename
 # the rest of this part is virtually identical to the previous section
 # please see those notes
 if [ $1 = s ]; then
   suffix=$2 ; shift ; shift
 
    if [$1 = ]; then
     echo "no files given"
    exit 0
    fi
 
  for file in $*
   do
    mv ${file} $file$suffix
  done
 
  exit 0
 fi
 
 # check for the replacement rename
 if [ $1 = r ]; then
 
   shift
 
 # i included this bit as to not damage any files if the user does not specify
 # anything to be done
 # just a safety measure
 
   if [ $# -lt 3 ] ; then
     echo "usage: renna r [expression] [replacement] files... "
     exit 0
   fi
 
 # remove other information
   OLD=$1 ; NEW=$2 ; shift ; shift
 
 # this for loop iterates through all of the files that we give the program
 # it does one rename per file given using the program 'sed'
 # this is a sinple command line program that parses standard input and
 # replaces a set expression with a give string
 # here we pass it the file name ( as standard input) and replace the nessesary
 # text
 
   for file in $*
   do
     new=`echo ${file} | sed s/${OLD}/${NEW}/g`
     mv ${file} $new
   done
 exit 0
 fi
 
 # if we have reached here then nothing proper was passed to the program
 # so we tell the user how to use it
 echo "usage;"
 echo " renna p [prefix] files.."
 echo " renna s [suffix] files.."
 echo " renna r [expression] [replacement] files.."
 exit 0
 
 # done!
</code>