yum grouplist显示不完整，缺少很多包：

# yum grouplist
Loaded plugins: ulninfo
Available Environment Groups:
   Minimal Install
   Infrastructure Server
   File and Print Server
   Basic Web Server
   Virtualization Host
   Server with GUI
Available Groups:
   Compatibility Libraries
   Console Internet Tools
   Development Tools
   Graphical Administration Tools
   Legacy UNIX Compatibility
   Scientific Support
   Security Tools
   Smart Card Support
   System Administration Tools
   System Management
Done

解决办法：

# yum grouplist hidden <<<加hidden
Loaded plugins: ulninfo
Available Environment Groups:
   Minimal Install
   Infrastructure Server
   File and Print Server
   Basic Web Server
   Virtualization Host
   Server with GUI
Installed Groups:
   Fonts  <<<<中文支持需要安装该包
Available Groups:
   Additional Development
   Anaconda Tools
   Backup Client
   Backup Server
   Base
   Common NetworkManager submodules
   Compatibility Libraries
   Conflicts (Server)
   Console Internet Tools
   Core
   DNS Name Server
   Debugging Tools
   Desktop Debugging and Performance Tools
   Development Tools
   Dial-up Networking Support
   Directory Client
   Directory Server
   E-mail Server
   Emacs
   FTP Server
   File and Storage Server
   GNOME
   GNOME Applications
   Graphical Administration Tools
   Graphics Creation Tools
   Guest Agents
   Guest Desktop Agents
   Hardware Monitoring Utilities
   Hyper-v platform specific packages
   Identity Management Server
   Infiniband Support
   Input Methods
   Internet Browser
   Java Platform
   KDE
   KVM platform specific packages
   Large Systems Performance
   Legacy UNIX Compatibility
   Legacy X Window System Compatibility
   Load Balancer
   Mainframe Access
   MariaDB Database Client
   MariaDB Database Server
   Multimedia
   Network File System Client
   Network Infrastructure Server
   Networking Tools
   PHP Support
   Performance Tools
   Perl Support
   Perl for Web
   Platform Development
   PostgreSQL Database Client
   PostgreSQL Database Server
   Print Server
   Printing Client
   Python
   Remote Desktop Clients
   Remote Management for Linux
   Ruby Support
   Scientific Support
   Security Tools
   Smart Card Support
   System Administration Tools
   System Management
   Technical Writing
   VMware platform specific packages
   Virtualization Client
   Virtualization Hypervisor
   Virtualization Platform
   Virtualization Tools
   Web Server
   Web Servlet Engine
   X Window System
Done

其他命令：

---查看命令所属包
# yum provides fuser
Loaded plugins: ulninfo
ol7_latest/filelists_db                                                                                                                | 3.8 MB  00:00:00
psmisc-22.20-15.el7.x86_64 : Utilities for managing processes on your system
Repo        : ol7_latest
Matched from:
Filename    : /usr/sbin/fuser

---查看repo
# yum repolist all
Loaded plugins: ulninfo
repo id                                                        repo name                                                                                status
ol7_latest                                                     Oracle Linux 7Server Latest (x86_64)                                                     5081
repolist: 5081

---打开的repo
# yum repolist enabled

---禁用的repo
# yum repolist disable

---yum-config-manger
# yum -y install yum-utils
# yum-config-manager --add-repo http://mirrors.aliyun.com/repo/epel-7.repo
# yum-config-manager --add-repo file:/mnt/cdrom/
# yum-config-manager --enable  repo名