It's 27 years old. It isn't even usable on anything remotely modern.
You can debug C programs using gdb on Unix.
Yes, quite a bit of companies and users use unix.
No.
Unix files do not rely on extensions, therefore there is no command to find them.
using touch command of UNIX. syntax touch <filename> will create dummy regular file.
Unix files can be easily transferred to windows via a network connection either by using FTP or by using Samba. Samba allows a Unix file system to be mounted/shared on a Windows system to look like a windows directory.
Use the 'uname -a' command. It reports on the Unix system, version, machine name, amongst other things.
There is no limitation for the POST method but for the GET method it is 256 characters
ar v3 is a cheat device for gba aka action replay v3
Unix web hosting is very reasonably priced and offers tons of other features. Unix can also offer you a domain name and help with setting everything up.
If both Windows and Unix are using TCP/IP as their primary NOS there isn't much difference to speak of.
None of the above.