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```
apt-cache [options] <command> # 检索apt缓存
#### 命令
depends <pkgs> # 列出pkg所依赖的包
rdepends <pkgs> # 列出所有依赖pkg的包
search <regex...> # 通过正则表达式搜索
show <pkg...> # 显示包的记录，类似于dpkg --print-avail的功能
#### 选项