Yes and no. Many web servers are based on a Unix or Linux system, but "Unix" itself can't be used to create web pages; it's an operating system. Web pages are created with an editor, which might be a fancy graphical editor like DreamWeaver or a plain old text editor like vi or the DOS EDIT program.
yes they do
Use useradd command
Use the 'mkdir' command
Serif drawplus x2, flash screens, pint for pictures, word,
adobe dreamweaver, Microsoft front page
To create a free Unix-like kernel that other people could study and use.
For TAR archives, you use tar -cvf .
HTML - Hyper Text Markup Language is a computer programming language which can be used to create webpages/websites.
Create an object module (WinDos: *.obj, unix: *.o), then use the platform-specific librarian program (WinDos: lib.exe, unix: ar, libtool)
There is no traditional 'execute' command in Unix.
You can use Microsoft Office Word, Publisher, Front Page. You will need to know how to use FTP.
It is possible to use BSD software on Unix systems. It is possible but many do not and they use other softwares on Unix systems beside the BSD software.