su: Operfation not permitted

Fedin Pavel
Sat May 12 09:32:00 GMT 2012

  I'm unable to use 'su' command. When i attempt to do so, i get:
su: /bin/bash: Operation not permitted

  This is different from wrong password or insufficient permissions, 
because if so, Cygwin explicitly informs me:
su: incorrect password, or insufficient privileges to change user (see Permission 

  What else can be wrong ?

  Kind regards
  Pavel Fedin
  Expert engineer, Samsung Moscow research center

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