20T2_q7.sh

#!/bin/bash
# 一键卸载 Hadoop + YARN

echo ">>> 开始卸载 Hadoop / YARN ..."

# 1. 检查 Homebrew 安装的情况
if brew list hadoop &>/dev/null; then
    echo ">>> 检测到 Homebrew 安装的 Hadoop，执行卸载..."
    brew uninstall hadoop
else
    echo ">>> 没有检测到 Homebrew 版本的 Hadoop"
fi

# 2. 常见的 Hadoop 安装目录
CANDIDATES=(
    "/usr/local/hadoop"
    "/opt/hadoop"
    "$HOME/hadoop"
    "/usr/local/Cellar/hadoop"
    "/opt/homebrew/Cellar/hadoop"
)

for dir in "${CANDIDATES[@]}"; do
    if [ -d "$dir" ]; then
        echo ">>> 删除目录: $dir"
        rm -rf "$dir"
    fi
done

# 3. 清理环境变量 (zsh 和 bash)
for file in "$HOME/.zshrc" "$HOME/.bashrc" "$HOME/.bash_profile"; do
    if [ -f "$file" ]; then
        echo ">>> 清理环境变量: $file"
        sed -i.bak '/HADOOP_HOME/d;/HADOOP_CONF_DIR/d;/hadoop\/bin/d;/hadoop\/sbin/d' "$file"
    fi
done

# 4. 杀掉可能残留的进程
echo ">>> 检查 Hadoop/YARN 相关进程..."
JPS=$(command -v jps)
if [ -n "$JPS" ]; then
    $JPS | grep -E 'NameNode|DataNode|SecondaryNameNode|ResourceManager|NodeManager' | awk '{print $1}' | xargs -r kill -9
fi

echo ">>> Hadoop / YARN 已卸载完成"
echo ">>> 请执行: source ~/.zshrc  或  source ~/.bashrc  来刷新环境变量"