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`env': Run a command in a modified environment

   `env' runs a command with a modified environment.  Synopses:

     env [OPTION]... [NAME=VALUE]... [COMMAND [ARGS]...]

   Arguments of the form `VARIABLE=VALUE' set the environment variable
VARIABLE to value VALUE.  VALUE may be empty (`VARIABLE=').  Setting a
variable to an empty value is different from unsetting it.

   The first remaining argument specifies the program name to invoke;
it is searched for according to the `PATH' environment variable.  Any
remaining arguments are passed as arguments to that program.

   If no command name is specified following the environment
specifications, the resulting environment is printed.  This is like
specifying a command name of `printenv'.

   The program accepts the following options.  Also see Note: Common

`-u NAME'
     Remove variable NAME from the environment, if it was in the

     Start with an empty environment, ignoring the inherited

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