ENVSUBST(1)                                                    GNU                                                   ENVSUBST(1)



NAME
       envsubst - substitutes environment variables in shell format strings

SYNOPSIS
       envsubst [OPTION] [SHELL-FORMAT]

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 envi-
       ronment  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 refer-
       enced in SHELL-FORMAT, one per line.

AUTHOR
       Written by Bruno Haible.

REPORTING BUGS
       Report bugs to <bug-gnu-gettextATgnu.org>.

COPYRIGHT
       Copyright   (C)   2003-2007   Free   Software   Foundation,   Inc.    License   GPLv3+:   GNU  GPL  version  3  or  later
       <http://gnu.org/licenses/gpl.html>;
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO
       The full documentation for envsubst is maintained as a Texinfo manual.  If the info and envsubst  programs  are  properly
       installed at your site, the command

              info envsubst

       should give you access to the complete manual.



GNU gettext-runtime 0.18.1                                  June 2010                                                ENVSUBST(1)