Unix
UNIX
is copyrighted name only big companies are allowed to use the UNIX copyright
and name, so IBM AIX and Sun Solaris and HP-UX all are UNIX operating systems.
Linux is Unix like
OS
Linux
is a clone of Unix. So, it can be considered as UNIX.
Linux Is Just a
Kernel
Linux
is just a kernel. All Linux distributions includes GUI system + GNU utilities. Linux
distribution makes it complete usable operating systems by adding various
applications.
However,
most UNIX operating systems are considered as a complete operating system as
everything come from a single source or vendor. Most UNIX operating systems
comes with A-Z programs such as editor, compilers etc.
License and cost
Linux
is Free. It is freely available in the market or can be downloaded from the
Internet or redistribute it under GNU licenses. Most UNIX like operating
systems are not free. They are vendor specific, costly and cann’t be
redistributed.
Vendor Specific Unix
OS
HP-UX
IBM
AIX
Sun
Solairs
Mac
OS X
IRIX
Linux Distribution
OS
Redhat
Enterprise Linux
Fedora
Linux
Debian
Linux
Suse
Enterprise Linux
Ubuntu
Linux
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