命令：sudo tasksel install lamp-server问：结果报错 tasksel: aptitude 操作失败 (100)，不知道是什么错误？答：这个情况，只要你输入aptitude命令启动一次aptitude然后退出再运行tasksel就能成功了
nginx启动报错，信息如下：nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use)nginx: [emerg] bind() to 0.0.0.0:80 failed ......
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