# 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 : Python is 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, : Mac and 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. : : This package provides the "python" executable; most of the actual : implementation is 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 2010 02:18:36 AM EST Install Date: Fri 03 Mar 2017 08:57:47 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 2011 12:46:50 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 2017 06:43:27 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 : MPLv2.0 and GPLv3+ and CC-BY-SA Description : Tilix is 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 out of view : : The application was written using GTK 3 and an effort was made to conform to : GNOME Human Interface Guidelines (HIG).
Information for package nano: ----------------------------- 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 : not installed 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: 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
$ aptitude show htop Package: htop Version: 2.0.2-1 State: installed Automatically installed: no Priority: optional Section: universe/utils Maintainer: Ubuntu Developers Architecture: amd64 Uncompressed Size: 216 k Depends: libc6 (>= 2.15), libncursesw5 (>= 6), libtinfo5 (>= 6) Suggests: lsof, strace Conflicts: htop:i386 Description: interactive processes viewer Htop is an ncursed-based process viewer similar to top, but it allows one to scroll the list vertically and horizontally to see all processes and their full command lines. Tasks related to processes (killing, renicing) can be done without entering their PIDs. Homepage: http://hisham.hm/htop/
