bash condition if OS ?

[Lloyd Budd]

Hi,

I am trying to combine some of my '.bash_profile's and '.bashrc's from 
various OSs into one file of each.  I have condition on hostname, but 
would like to generalize some parts on OS.  $OSTYPE is useful, though 
some OSs have the annoying habit of including version # in OSTYPE.  Is 
there a better variable to use?  Short of using an external prog I 
cannot seem to figure out how to  use Bash's reg exp to check for 
substring at beginning of the string. ?

Thank you,
Lloyd

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