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   test.1p    ( 1 )

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Примеры (Examples)

1. Exit if there are not two or three arguments (two
           variations):

               if [ $# -ne 2 ] && [ $# -ne 3 ]; then exit 1; fi
               if [ $# -lt 2 ] || [ $# -gt 3 ]; then exit 1; fi

        2. Perform a mkdir if a directory does not exist:

               test ! -d tempdir && mkdir tempdir

        3. Wait for a file to become non-readable:

               while test -r thefile
               do
                   sleep 30
               done
               echo '"thefile" is no longer readable'

        4. Perform a command if the argument is one of three strings
           (two variations):

               if [ "$1" = "pear" ] || [ "$1" = "grape" ] || [ "$1" = "apple" ]
               then
                   command
               fi

               case "$1" in
                   pear|grape|apple) command ;;
               esac