*yum查詢功能

1. 查詢選項：

   [root@kvm8 ~]# dnf [options] [command] [package ...]
   [option]：主要的搜尋選項有：
   [查詢工作項目] [相關參數]：這方面的參數有：
     search  ：搜尋某個套件名稱或是描述 (description) 的重要關鍵字；
     list    ：列出目前 yum 所管理的所有的套件名稱與版本，有點類似 rpm -qa；
     info    ：列出套件的相關訊息，類似 rpm -qai 的執行結果；
     provides or whatprovides：搜尋包含某檔案的套件，類似 rpm -qf 的功能。
   

2. 查詢名稱或是描述中包含關鍵字cjk的套件

   [root@kvm8 ~]# dnf search cjk
   Last metadata expiration check: 0:16:27 ago on Tue 04 Oct 2022 11:13:08 AM CST.
   ========================== Name & Summary Matched: cjk ==========================
   google-noto-cjk-fonts-common.noarch : Common files for Noto CJK fonts
   google-noto-sans-cjk-ttc-fonts.noarch : Sans OTC font files for
                                         : google-noto-cjk-fonts
   google-noto-serif-cjk-ttc-fonts.noarch : Serif OTC font files for
                                          : google-noto-cjk-fonts
   texlive-cjk.noarch : CJK language support
   texlive-xecjk.noarch : Support for CJK documents in XeLaTeX
   ============================= Summary Matched: cjk ==============================
   bitmap-fangsongti-fonts.noarch : Selected CJK bitmap fonts for Anaconda
   texlive-garuda-c90.noarch : TeX support (from CJK) for the garuda font
   texlive-norasi-c90.noarch : TeX support (from CJK) for the norasi font in
                             : thailatex
   

3. 查看套件google-noto-cjk-fonts-common的相關訊息

   [root@kvm8 ~]# dnf info google-noto-cjk-fonts-common.noarch
   Last metadata expiration check: 0:18:58 ago on Tue 04 Oct 2022 11:13:08 AM CST.
   Installed Packages
   Name         : google-noto-cjk-fonts-common
   Version      : 20201206
   Release      : 4.el9
   Architecture : noarch
   Size         : 32 k
   Source       : google-noto-cjk-fonts-20201206-4.el9.src.rpm
   Repository   : @System
   From repo    : AppStream
   Summary      : Common files for Noto CJK fonts
   URL          : https://github.com/googlei18n/noto-cjk
   License      : OFL
   Description  :
                : Noto CJK fonts, supporting Simplified Chinese, Traditional
                : Chinese, Japanese, and Korean. The supported scripts are Han,
                : Hiragana, Katakana, Hangul, and Bopomofo. Latin, Greek, Cyrllic,
                : and various symbols are also supported for compatibility with CJK
                : standards.
                :
                :
                : Common files for Google Noto CJK fonts.
   

4. 列出所有evince開頭的套件

   [root@cs ~]# dnf list evince*
   Last metadata expiration check: 21:06:59 ago on Mon 03 Oct 2022 02:25:56 PM CST.
   Installed Packages
   evince.x86_64                              40.4-4.el9                  @AppStream
   evince-libs.x86_64                         40.4-4.el9                  @AppStream
   evince-nautilus.x86_64                     40.4-4.el9                  @AppStream
   evince-previewer.x86_64                    40.4-4.el9                  @AppStream
   evince-thumbnailer.x86_64                  40.4-4.el9                  @AppStream
   Available Packages
   evince-libs.i686                           40.4-4.el9                  AppStream
   

5. 列出包含檔案bin/evince的所有套件，例如/usr/bin/evince。

   [root@kvm8 ~]# dnf provides *bin/evince
   Last metadata expiration check: 0:21:21 ago on Tue 04 Oct 2022 11:13:08 AM CST.
   evince-40.4-4.el9.x86_64 : Document viewer
   Repo        : AppStream
   Matched from:
   Other       : *bin/evince