Linux OS is multiuser, multitasking operating system and portable to be installed on any hardware platform. Linux OS provides robut security features in comparative to other desktop operating systems.
Linux Kernel was bundled with many others software packages from various distributors and named it there own distributions. We can see such distribution list in tree format.
Linux OS is capable of running multiple applications and processes at the same time.
It means more than one user can shares the same system resources (hard disk,memory, printer, application software etc..) at the same time.
Linux OS can be installed on all hardware architectures.
Linux OS servers are highly available and requires less downtime. And this enables small to large organizations to equip linux server for their application hostings.
Linux OS provides robut security features in comparative to other desktop operating systems particularly - windows operating system. For example,
Linux servers are more insulated to viruses than its counter part windows.
Email attachments are not directly executable in linux machines.
Multiple linux servers can be harnessed as part of high performance cluster. This provides highly available application services during hardware failures on any box.