example14.20

UNIX[1].shell范例精解(第4版)_code

echo  "Are you o.k. (y/n) ?"
read answer
if [ "$answer" = Y -o "$answer" = y ] 
then                 
       echo  "Glad to hear it."
fi

if [ $answer = Y -o "$answer" = y ] 
[: too many arguments

if [[ $answer == [Yy]* || $answer == Maybe ]]
then
      echo  "Glad to hear it."
fi

shopt -s extglob

answer="not really"

if [[ $answer = [Nn]o?( way|t really) ]]
then
       echo "So sorry. "
fi