Linus Torvalds in Sept. 1991
The 2.4 version of the Linux kernel was released in 2001.
The Linux kernel which forms the base of Linux started to be developed in 1991 It wasn't until late 1993 when Slackware first appeared that it was in any kind of usable form though - unless you were an uber geek that is. Red Hat Linux 1 appeared in mid 1994 and Debian 1 was released a year later The first Ubuntu (a clone of Debian) didn't get released till 2004
I think it was the Linux kernel. There are many used with Linux now.
The kernel.
Yes, Linux is an open source kernel released under the GPL.
How much old do you mean by old? Well, before Gnome and KDE, there was the Command Line Interface (CLI). MCC Interim Linux was the first linux distribution, released in February 1992 used the CLI.
The first used operating system between MS-DOS and Linux is MS-DOS. MS-DOS, short for Microsoft Disk Operating System, was developed by Microsoft and released in 1981. Linux, on the other hand, was created by Linus Torvalds and released in 1991. Therefore, MS-DOS predates Linux in terms of initial release and usage.
Yes. Valve has released the Linux version of Steam, and there is a steadily-increasing number of games in Steam that are playable in Linux (and some of them are cross-platform, like Portal, Team Fortress, Left 4 Dead, etc). As an alternative, Valve also released SteamOS (which is based on Linux).
The first step to using a Linux LVM would be to install the program onto the Linux computer. The second step would be to activate the program and use the program for its purpose.
The first file system Linux supported was the MINIX file system.
BSD
Yes, install Windows first, then whichever distribution of Linux you want second.