This is an example of how to create a bash menu using while and read.

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#!/bin/sh
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echo "Use one of the following options"
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echo " d : run date command"
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echo "  : "
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echo " q: quit this menu"
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echo "enter your choice or type "q" to quit : \c"
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read option
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while [ "$option" != "q" ]
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 do
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 case $option in
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 d ) date
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 shift
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 echo "enter your choice or type "q" to quit : \c"
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 read option
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 ;;
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  ) 
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 shift
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 echo "enter your choice or type "q" to quit : \c"
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 read option
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 ;;
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#                       ...
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 shift
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 echo "enter your choice or type "q" to quit : \c"
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 read option
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 ;;
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 read option
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 ;;
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 q ) exit 0
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 ;;
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 esac