bionic (1) envsubst.1.gz

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 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.

AUTHOR

       Written by Bruno Haible.

REPORTING BUGS

       Report bugs to <bug-gnu-gettext@gnu.org>.

COPYRIGHT

       Copyright  ©  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.