yum info 命令查看當前安裝的軟件的信息，如軟件來源於哪個源，軟件介紹等
[root@bogon etc]# yum info wget
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
* base: mirror.bit.edu.cn
* extras: mirror.bit.edu.cn
* updates: mirror.bit.edu.cn
Installed Packages
Name : wget
Arch : x86_64
Version : 1.14
Release : 18.el7_6.1
Size : 2.0 M
Repo : installed
From repo : base
Summary : A utility for retrieving files using the HTTP or FTP protocols
URL : http://www.gnu.org/software/wget/
License : GPLv3+
Description : GNU Wget is a file retrieval utility which can use either the HTTP or
: FTP protocols. Wget features include the ability to work in the
: background while you are logged out, recursive retrieval of
: directories, file name wildcard matching, remote file timestamp
: storage and comparison, use of Rest with FTP servers and Range with
: HTTP servers to retrieve files over slow or unstable connections,
: support for Proxy servers, and configurability.
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