Linux - Finding the flavor

Problem
    Finding the flavor of Linux you are working on.

Solution
     Login to the machine and issue the following command at the prompt

     cat /etc/issue

Sample Results

[nseshadr@machine1 ~]$ cat /etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 6)

machine2:~ # cat /etc/issue
Welcome to openSUSE 10.3 (i586) - Kernel \r (\l).