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How To CentOS / RHEL 7 Install Gnome Desktop Using Yum

I installed minimal CentOS Linux 7.x on my laptop. How can I install Gnome desktop GUI on a RHEL (Red Hat) 7 or CentOS Linux 7 system using command line option?
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Debian / Ubuntu Linux: Install GTK 2+ Development Environment

I recently installed Debian version 6.x on my Mac book pro. I wanted to write code in C/Gnome GTK and develop apps for fun and profit. How do I install C and Gnome gtk development environment under Debian or Ubuntu Linux operating systems?
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Linux / Unix: Unicode and HTML Characters Lookup By Name or Number

I need to replace special characters with equivalent hexadecimal unicode under Linux or Unix like operating system. How do I list or find out unicodes for given characters?
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Linux Gnome Desktop Windows Decoration Disappeared

Sometime when I logged on to my Gnome Linux desktop I noticed that windows decoration disappeared i.e. minimize / maximaize / close buttons and other decoration gone. How do I fix this annoying problem under Fedora / Mint / Debian / Ubuntu Linux gnome desktop?
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Linux Gnome: gconf-sanity-check-2 Exited With Status 256 Error and Solution

When I try to login into my Linux Gnome based desktop system, I get the following error from GDM :

gconf-sanity-check-2 exited with status 256

How do I fix this problem?
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Open Gnome Nautilus File Manager For The Current Linux / Unix Command Line

Nautilus is the file manager for the GNOME desktop. How do I open Nautilus from the Linux or Unix shell prompt to open files and directories on a Linux or Unix based desktop?
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Gnome Network Manager VPN Tab Disabled ( Greyed out )

I've the NetworkManager service is installed and started under Linux desktop. The applet is running. The NetworkManager can display available network hardware and wireless networks. But, I'm unable to add VPN support as the Add tab is greyed out. I need to use both PPTP and Cisco vpn clients. How do I fix this problem under Debian or Ubuntu Linux?
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Gnome Volume Control: Disabled Sound Themes

Problem is that every time I click something I get annoying sound from computer speaker. So I tried to disable or set new sound theme by visiting System > Preferences > Sound. The Sound Theme tab is greyed out. Sound itself is not working and I can only get annoying sound. How do I fix this problem under Debian or Ubuntu Linux gnome desktop system?
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Ubuntu Linux: Show Gnome Version

How do I see my gnome desktop version using command line options?
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CentOS / RHEL Linux: Remove GDM

How do I uninstall a GUI Gnome login system ( GDM ) from my CentOS Linux v5.5 based server?
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