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6.4. apt-file 命令

Sometimes we refer to a file or a command and you might wonder, in which package it will be found. Fortunately the Debian repositories not only contain information about all the binary packages provided, but also all the files shipped with them. This information is stored in files named Contents-arch.gz and Contents-udeb-arch.gz. This information is not automatically downloaded by APT. Instead it needs the apt-file update command (from the similar named package) to retrieve the contents of all package sources mentioned in /etc/apt/sources.list. By default it downloads Contents*.pdiff files as described in sidebar 提示 增量更新 to reduce the amount of data necessary to be downloaded. To update the database on a weekly base, the following entry can be added to /etc/crontab if convenient.
@weekly root test -x /usr/bin/apt-file && /usr/bin/apt-file update >> /dev/null 2>&1
数据库更新后,命令 apt-file search pattern 会列出包含文件名或模式匹配的所有软件包。
$ apt-file search bin/axi-cache
apt-xapian-index: /usr/bin/axi-cache
命令 apt-file list package 会列出软件包附带的所有文件。