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   envsubst    ( 1 )

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Имя (Name)

envsubst - substitutes environment variables in shell format
       strings

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Синопсис (Synopsis)

envsubst [OPTION] [SHELL-FORMAT]

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Описание (Description)

Substitutes the values of environment variables.

   Operation mode:
       -v, --variables
              output the variables occurring in SHELL-FORMAT

   Informative output:
       -h, --help
              display this help and exit

       -V, --version
              output version information and exit

       In normal operation mode, standard input is copied to standard
       output, with references to environment variables of the form
       $VARIABLE or ${VARIABLE} being replaced with the corresponding
       values.  If a SHELL-FORMAT is given, only those environment
       variables that are referenced in SHELL-FORMAT are substituted;
       otherwise all environment variables references occurring in
       standard input are substituted.

       When --variables is used, standard input is ignored, and the
       output consists of the environment variables that are referenced
       in SHELL-FORMAT, one per line.

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