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我正在尝试运行我在网上找到的代码。里面有一个shell脚本，但是每次我尝试运行它时，它都会给我这个错误：

bash: dirname: command not found

我试过设置PATH：

PATH=/home/user/bin

但它不起作用。

我在 Windows 10 机器上使用 Git Bash。

这是 shell 脚本的样子

#!/bin/bash
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

if [ $# -lt 1 ];
then
    echo "USAGE: $0 [-daemon] zookeeper.properties"
    exit 1
fi
base_dir=$(dirname $0)

if [ "x$KAFKA_LOG4J_OPTS" = "x" ]; then
    export KAFKA_LOG4J_OPTS="-Dlog4j.configuration=file:$base_dir/../config/log4j.properties"
fi

if [ "x$KAFKA_HEAP_OPTS" = "x" ]; then
    export KAFKA_HEAP_OPTS="-Xmx512M -Xms512M"
fi

EXTRA_ARGS=${EXTRA_ARGS-'-name zookeeper -loggc'}

COMMAND=$1
case $COMMAND in
  -daemon)
     EXTRA_ARGS="-daemon "$EXTRA_ARGS
     shift
     ;;
 *)
     ;;
esac

exec $base_dir/kafka-run-class.sh $EXTRA_ARGS org.apache.zookeeper.server.quorum.QuorumPeerMain "$@"
`
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