Re: !0 Linux Shell tricks
  By: Angus McLeod to Ibanez on Sun Jun 24 2007 10:28 am

 > What is the colon (":") for?  If I want an enpty file I just do
 >
 >      > filename.ext
 >
 > without a colon.

Portability.  Null commands are invalid in csh.  : is a shell builtin which
does nothing and succeeds.

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