如何在Linux上检查一个软件包的详细信息

APT 意为高级打包工具Advanced Packaging Tool，就像 DNF 将如何替代 YUM 一样，APT 是 apt-get 的替代物。它功能丰富的命令行工具包括了如下所有命令的功能如 apt-cache、apt-search、dpkg、apt-cdrom、apt-config、apt-key 等等，我们可以方便的通过 apt 来安装 .dpkg 包，但是我们却不能通过 apt-get 来完成这一点，还有一些其他的类似的功能也不能用 apt-get 来完成，所以 apt-get 因为没有解决上述功能缺乏的原因而被 apt 所取代。

（LCTT 译注： 用 apt show 查看 nano 包信息）

$ apt show nano
Package: nano
Version: 2.8.6-3
Priority: standard
Section: editors
Origin: Ubuntu
Maintainer: Ubuntu Developers 
Original-Maintainer: Jordi Mallach 
Bugs: https://bugs.launchpad.net/ubuntu/+filebug
Installed-Size: 766 kB
Depends: libc6 (>= 2.14), libncursesw5 (>= 6), libtinfo5 (>= 6)
Suggests: spell
Conflicts: pico
Breaks: nano-tiny (<< 2.8.6-2)
Replaces: nano-tiny (<< 2.8.6-2), pico
Homepage: https://www.nano-editor.org/
Task: standard, ubuntu-touch-core, ubuntu-touch
Supported: 9m
Download-Size: 222 kB
APT-Manual-Installed: yes
APT-Sources: http://in.archive.ubuntu.com/ubuntu artful/main amd64 Packages
Description: small, friendly text editor inspired by Pico
 GNU nano is an easy-to-use text editor originally designed as a replacement
 for Pico, the ncurses-based editor from the non-free mailer package Pine
 (itself now available under the Apache License as Alpine).
 .
 However, GNU nano also implements many features missing in pico, including:
  - undo/redo
  - line numbering
  - syntax coloring
  - soft-wrapping of overlong lines
  - selecting text by holding Shift
  - interactive search and replace (with regular expression support)
  - a go-to line (and column) command
  - support for multiple file buffers
  - auto-indentation
  - tab completion of filenames and search terms
  - toggling features while running
  - and full internationalization support

dpkg 命令：查看Debian/Ubuntu/Mint系统上的包信息

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