This is usually the Tab key. Note that this not a feature specific to Linux, nor to any particular piece of software. Similar functionality is present in most Unix-like systems and is available for MS-DOS and the Windows Command Prompt as well.
On your keyboard their should be a "PrtSc/SysRq" button which, when pressed, will take a screen shot.
Linux does not have a limit as to the number of characters you can enter in a command.
You just have to plug the device and Linux will load the drivers automatically.
The Linux kernel entropy pool is limited to 4096 bits because of the lack of a mouse and keyboard.
Computer software - is another name for computer programs, Computer programs can be as simple as displaying a letter on a screen, when it's pressed on the keyboard - to a complete operating system (such as Windows or Linux). Operating systems are usually loaded at the factory when the computer is manufactured.
Change your ISP service to cable or dsl
Ctrl+alt+f1
I thought this is a magic cube. I've yet to see one with an attached keyboard though.
When it finishes booting. (Starting Windows\Mac OSX\Linux\Other)
If you are using Red Hat 8 or more then install your Vega card and then boot into linux. Red Hat should automatically be able to configure it. If not then find out whether that Vega card is supported in the Linux that you are using. Also find out the driver of your Vega card for Linux .... from the manufacturer's web site.
This is usually caused by using a USB keyboard. The BIOS knows how to use a USB keyboard, and so does Linux. But GRUB can only recognize keyboard inputs from older types of keyboards, like the type that plugs into a PS/2 port. All you need to do is enter your BIOS and enable "Legacy USB" or "USB keyboard emulation." This will allow the keyboard to be used during the initial booting phase, before Linux starts.
Actually, there is no "Linux environment" since Linux is only the name of the kernel written by Linus Torvalds. GNU is the rest of the operating system. So what most people commonly call "Linux" is really GNU+Linux. Then the various distributions add their own code and changes. The GNU+Linux combination has been completed since 1991. GNU started working on their own kernel called GNU Hurd in 1990. However, it was a more difficult project than anticipated, and the Linux kernel was completed in 1991. It would take another 10 years to complete Hurd, so they used the Linux kernel to make the GNU project usable much sooner. Now Hurd is mostly finished. They continued with Hurd despite the existence of Linux since they put in so much work and there was no reason to waste their effort.