Command to tell whether it ubuntu and mac

[Avi Greenbury]

Peng Yu wrote:

> I want to make a script work for both mac and ubuntu. Is there a
> command that I can tell me whether I'm on an ubuntu or on a mac?

Several. A mac wont, for example, have any files of the
form /boot/vmlinuz, or a /proc.

uname is probably the most appropriate one - OSX uses a Darwin kernel
while Ubuntu uses a Linux one.

What are you writing the script in? There's a few utilities that can
help with the various changes you'll need to make to your assumptions
for different systems.

-- 
Avi