Absolutely. Very widely used. Actually, this very site runs on Linux...
The gtkpod software (See links below) is widely used for using an iPod with a Linux system.
Computer professionals that are running a dedicated webserver use dedicated Linux servers. Linux servers are currently the most widely used server operating systems in the world.
BIND is the default package for Domain Name service(DNS) in Linux based systems, one of the widely used DNS servers across the internet.
Tux is the unofficial but widely known mascot for the Linux kernel.
It's not really more vulnerable. Windows is more widely used so it has more viruses written for it.
Search Google with "jboss in Linux" for more info: Quote from jboss.org: JBoss, a free J2EE 1.4 certified application server, is the most widely used Open Source application server on the market. Unquote.
Yes, Linux can be used on a mainframe.
Widely used text-based operating system? Well, almost any Unix or Unix-like can be used in this way. X11 GUIs are an entirely optional application. Many Linux users only use the command line.
Linux hositng is cheaper because there is less data. Windows based hosting is more commonplace and widely used.
Computers need some kind of operating system; the most widely used is windows (from Microsoft). Other systems exist as well, such as Linux.
red hat enterprise Linux is used as a server while red hat Linux is used as client..