Example of using the shift command

To successively shift the argument that is represented by each positional parameter:

   cat shift_demo
   #!/bin/sh
   echo "arg1=$1 arg2=$2 arg3=$3"
   shift
   echo "arg1=$1 arg2=$2 arg3=$3"
   shift
   echo "arg1=$1 arg2=$2 arg3=$3"
   shift
   echo "arg1=$1 arg2=$2 arg3=$3"
   shift_demo one two three four five six seven
   arg1=one arg2=two arg3=three
   arg1=two arg2=three arg3=four
   arg1=three arg2=four arg3=five
   arg1=four arg2=five arg3=six
   arg1=five arg2=six arg3=seven

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