# yum info python Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile * epel: epel.mirror.constant.com Installed Packages Name : python Arch : x86_64 Version : 2.6.6 Release : 66.el6_8 Size : 78 k Repo : installed From repo : updates Summary : An interpreted, interactive, object-oriented programming language URL : http://www.python.org/ License : Python Description : Pythonis an interpreted, interactive, object-oriented programming : language often compared to Tcl, Perl, Scheme or Java. Python includes : modules, classes, exceptions, very high level dynamic data types and : dynamic typing. Python supports interfaces to many system calls and : libraries, as well as to various windowing systems (X11, Motif, Tk, : Macand MFC). : : Programmers can write new built-in modules for Python in C or C++. : Python can be used as an extension language for applications that need : a programmable interface. : : Note that documentation for Python is provided in the python-docs : package. : : Thispackageprovides the "python" executable; most of the actual : implementationis within the "python-libs"package.
YUMDB 命令：查看 RHEL 和 CentOS 系统上的包信息
yumdb info 这个命令提供与 yum info 相类似的的信息，不过它还额外提供了诸如包校验值、包类型、用户信息（由何人安装）。从 yum 3.2.26 版本后，yum 开始在 rpm 数据库外储存额外的信息了（此处如显示 user 表明该包由用户安装，而 dep 说明该包是被作为被依赖的包而被安装的）。
# rpm -qi nano Name : nano Relocations: (not relocatable) Version : 2.0.9 Vendor: CentOS Release : 7.el6 Build Date: Fri 12 Nov 201002:18:36 AM EST Install Date: Fri 03 Mar 201708:57:47 AM EST Build Host: c5b2.bsys.dev.centos.org Group : Applications/Editors Source RPM: nano-2.0.9-7.el6.src.rpm Size : 1588347 License: GPLv3+ Signature : RSA/8, Sun 03 Jul 201112:46:50 AM EDT, Key ID 0946fca2c105b9de Packager : CentOS BuildSystem URL : http://www.nano-editor.org Summary : A small text editor Description : GNU nano is a small and friendly text editor.
$ dnf info tilix Last metadata expiration check: 27 days, 10:00:23 ago on Wed 04 Oct 201706:43:27 AM IST. Installed Packages Name : tilix Version : 1.6.4 Release : 1.fc26 Arch : x86_64 Size : 3.6 M Source : tilix-1.6.4-1.fc26.src.rpm Repo : @System From repo : @commandline Summary : Tiling terminal emulator URL : https://github.com/gnunn1/tilix License : MPLv2.0and GPLv3+ and CC-BY-SA Description : Tilixis a tiling terminal emulator with the following features: : : - Layout terminals in any fashion by splitting them horizontally or vertically : - Terminals can be re-arranged using drag and drop both within and between : windows : - Terminals can be detached into a new window via drag and drop : - Input can be synchronized between terminals so commands typed in one : terminal are replicated to the others : - The grouping of terminals can be saved and loaded from disk : - Terminals support custom titles : - Color schemes are stored in files and custom color schemes can be created by : simply creating a new file : - Transparent background : - Supports notifications when processes are completed outof view : : The application was written using GTK 3and an effort was made to conform to : GNOME Human Interface Guidelines (HIG).
Information forpackagenano: ----------------------------- Repository : Main Repository (OSS) Name : nano Version : 2.4.2-5.3 Arch : x86_64 Vendor : openSUSE Installed Size : 1017.8 KiB Installed : No Status : notinstalled Source package: nano-2.4.2-5.3.src Summary : Pico editor clone with enhancements Description : GNU nano is a small and friendly text editor. It aims to emulate the Pico text editor while also offering a few enhancements.
Pacman 命令：在 ArchLinux 及 Manjaro 系统上查看包信息
Pacman 意即 包管理器 实用工具。pacman 是一个用于安装、构建、删除、管理 Arch Linux 上包的命令行工具。它后端使用 libalpm（Arch Linux package Manager（ALPM）库）来完成所有功能。
$ sudo apt-cache show apache2 Package: apache2 Priority: optional Section: web Installed-Size: 473 Maintainer: Ubuntu Developers Original-Maintainer: Debian Apache Maintainers Architecture: amd64 Version: 2.4.12-2ubuntu2 Replaces: apache2.2-common Provides: httpd, httpd-cgi Depends: lsb-base, procps, perl, mime-support, apache2-bin (= 2.4.12-2ubuntu2), apache2-utils (>= 2.4), apache2-data (= 2.4.12-2ubuntu2) Pre-Depends: dpkg (>= 1.17.14) Recommends: ssl-cert Suggests: www-browser, apache2-doc, apache2-suexec-pristine | apache2-suexec-custom, ufw Conflicts: apache2.2-common (<< 2.3~) Filename: pool/main/a/apache2/apache2_2.4.12-2ubuntu2_amd64.deb Size: 91348 MD5sum: ab0ee0b0d1c6b3d19bd87aa2a9537125 SHA1: 350c9a1a954906088ed032aebb77de3d5bb24004 SHA256: 03f515f7ebc3b67b050b06e82ebca34b5e83e34a528868498fce020bf1dbbe34 Description-en: Apache HTTP Server The Apache HTTP Server Project's goal is to build a secure, efficient and extensible HTTP server as standards-compliant open source software. The result has long been the number one web server on the Internet. . Installing this package results in a full installation, including the configuration files, init scripts and support scripts. Description-md5: d02426bc360345e5acd45367716dc35c Homepage: http://httpd.apache.org/ Bugs: https://bugs.launchpad.net/ubuntu/+filebug Origin: Ubuntu Supported: 9m Task: lamp-server, mythbuntu-frontend, mythbuntu-desktop, mythbuntu-backend-slave, mythbuntu-backend-master, mythbuntu-backend-master
$ 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:index_imgo Breaks:nano-tiny (<< 2.8.6-2) Replaces:nano-tiny (<< 2.8.6-2), index_imgo 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 index_imgo, 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
