hidden: yum group list で全量を出力するオプション

何回やっても忘れるのでメモ。

## 参考文献
- [How to install a group of packages with yum on Red Hat Enterprise Linux? - Red Hat Customer Portal](https://access.redhat.com/solutions/15815)
- [8.3. Working with Package Groups - Red Hat Customer Portal](https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/sec-working_with_package_groups)
- [yumで非表示のグループリストを表示するには － ＠IT](http://www.atmarkit.co.jp/flinux/rensai/linuxtips/975grouplisthidden.html)

## ただ単に `yum group list` しても全量が出力されない。
```
$ LANG=C sudo yum group list
Loaded plugins: fastestmirror
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
Loading mirror speeds from cached hostfile
Available Environment Groups:
   Minimal Install
   Compute Node
   Infrastructure Server
   File and Print Server
   Basic Web Server
   Virtualization Host
   Server with GUI
   GNOME Desktop
   KDE Plasma Workspaces
   Development and Creative Workstation
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
```

## `hidden` オプションを付与すると全量が出力される。
```
$ LANG=C sudo yum group list hidden
Loaded plugins: fastestmirror
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
Loading mirror speeds from cached hostfile
Available Environment Groups:
   Minimal Install
   Compute Node
   Infrastructure Server
   File and Print Server
   Basic Web Server
   Virtualization Host
   Server with GUI
   GNOME Desktop
   KDE Plasma Workspaces
   Development and Creative Workstation
Available Groups:
   Additional Development
   Anaconda Tools
   Backup Client
   Backup Server
   Base
   Common NetworkManager submodules
   Compatibility Libraries
   Conflicts (Client)
   Conflicts (ComputeNode)
   Conflicts (Server)
   Conflicts (Workstation)
   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
   Fonts
   GNOME
   GNOME Applications
   Graphical Administration Tools
   Graphics Creation Tools
   Guest Agents
   Guest Desktop Agents
   Hardware Monitoring Utilities
   High Availability
   Hyper-v platform specific packages
   Identity Management Server
   Infiniband Support
   Input Methods
   Internet Applications
   Internet Browser
   Java Platform
   KDE
   KDE Applications
   KDE Multimedia Support
   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
   Office Suite and Productivity
   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
   Resilient Storage
   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
```

## ついでに ids オプションで ID も出力される。
```
$ LANG=C sudo yum group list hidden ids
Loaded plugins: fastestmirror
There is no installed groups file.
Maybe run: yum groups mark convert (see man yum)
Loading mirror speeds from cached hostfile
Available Environment Groups:
   Minimal Install (minimal)
   Compute Node (compute-node-environment)
   Infrastructure Server (infrastructure-server-environment)
   File and Print Server (file-print-server-environment)
   Basic Web Server (web-server-environment)
   Virtualization Host (virtualization-host-environment)
   Server with GUI (graphical-server-environment)
   GNOME Desktop (gnome-desktop-environment)
   KDE Plasma Workspaces (kde-desktop-environment)
   Development and Creative Workstation (developer-workstation-environment)
Available Groups:
   Additional Development (additional-devel)
   Anaconda Tools (anaconda-tools)
   Backup Client (backup-client)
   Backup Server (backup-server)
   Base (base)
   Common NetworkManager submodules (networkmanager-submodules)
   Compatibility Libraries (compat-libraries)
   Conflicts (Client) (conflicts-client)
   Conflicts (ComputeNode) (conflicts-computenode)
   Conflicts (Server) (conflicts-server)
   Conflicts (Workstation) (conflicts-workstation)
   Console Internet Tools (console-internet)
   Core (core)
   DNS Name Server (dns-server)
   Debugging Tools (debugging)
   Desktop Debugging and Performance Tools (desktop-debugging)
   Development Tools (development)
   Dial-up Networking Support (dial-up)
   Directory Client (directory-client)
   Directory Server (directory-server)
   E-mail Server (mail-server)
   Emacs (emacs)
   FTP Server (ftp-server)
   File and Storage Server (file-server)
   Fonts (fonts)
   GNOME (gnome-desktop)
   GNOME Applications (gnome-apps)
   Graphical Administration Tools (graphical-admin-tools)
   Graphics Creation Tools (graphics)
   Guest Agents (guest-agents)
   Guest Desktop Agents (guest-desktop-agents)
   Hardware Monitoring Utilities (hardware-monitoring)
   High Availability (ha)
   Hyper-v platform specific packages (platform-microsoft)
   Identity Management Server (identity-management-server)
   Infiniband Support (infiniband)
   Input Methods (input-methods)
   Internet Applications (internet-applications)
   Internet Browser (internet-browser)
   Java Platform (java-platform)
   KDE (kde-desktop)
   KDE Applications (kde-apps)
   KDE Multimedia Support (kde-media)
   KVM platform specific packages (platform-kvm)
   Large Systems Performance (large-systems)
   Legacy UNIX Compatibility (legacy-unix)
   Legacy X Window System Compatibility (legacy-x)
   Load Balancer (load-balancer)
   Mainframe Access (mainframe-access)
   MariaDB Database Client (mariadb-client)
   MariaDB Database Server (mariadb)
   Multimedia (multimedia)
   Network File System Client (network-file-system-client)
   Network Infrastructure Server (network-server)
   Networking Tools (network-tools)
   Office Suite and Productivity (office-suite)
   PHP Support (php)
   Performance Tools (performance)
   Perl Support (perl-runtime)
   Perl for Web (perl-web)
   Platform Development (platform-devel)
   PostgreSQL Database Client (postgresql-client)
   PostgreSQL Database Server (postgresql)
   Print Server (print-server)
   Printing Client (print-client)
   Python (python-web)
   Remote Desktop Clients (remote-desktop-clients)
   Remote Management for Linux (remote-system-management)
   Resilient Storage (resilient-storage)
   Ruby Support (ruby-runtime)
   Scientific Support (scientific)
   Security Tools (security-tools)
   Smart Card Support (smart-card)
   System Administration Tools (system-admin-tools)
   System Management (system-management)
   Technical Writing (technical-writing)
   VMware platform specific packages (platform-vmware)
   Virtualization Client (virtualization-client)
   Virtualization Hypervisor (virtualization-hypervisor)
   Virtualization Platform (virtualization-platform)
   Virtualization Tools (virtualization-tools)
   Web Server (web-server)
   Web Servlet Engine (web-servlet)
   X Window System (x11)
Done
```

どっとはらい。