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dpkg-query
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===
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Debian Linux中软件包的查询工具
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## 补充说明
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**dpkg-query命令** 是Debian Linux中软件包的查询工具，它从dpkg软件包数据库中查询并辨识软件包的信息。
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### 语法
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```
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dpkg-query(选项)(参数)
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```
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### 选项
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```
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-l：列出符合匹配模式的软件包；
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-s：查询软件包的状态信息；
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-L：显示软件包所安装的文件列表；
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-S：从安装的软件包中查询文件；
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-w：显示软件包信息；
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-c：显示软件包的控制文件路径；
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-p：显示软件包的细节。
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```
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### 参数
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软件包名称：指定需要查询的软件包。
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### 实例
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查找文件file1在哪个包里安装：
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```
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dpkg-query -S file1
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```
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列出ubuntu下所安装软件列表：
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```
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dpkg-query -W --showformat='${Package} ${Version}\n' > filename
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```
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查看软件包详细信息：
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```
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dpkg-query -s capistrano
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```
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查看软件包安装时安装到系统的文件列表：
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```
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dpkg-query -L capistrano
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```
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列出所有安装的包：
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```
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dpkg-query -l
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```
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查看软件包的确切状态（是否安装）以及版本号：
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```
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dpkg-query -W -f='${Status} ${Version}\n' apache-perl
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```
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<!-- Linux命令行搜索引擎：https://jaywcjlove.github.io/linux-command/ -->
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