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-FOR‐
MAT, one per line.
AUTHOR
Written by Bruno Haible.
REPORTING BUGS
Report bugs to .
COPYRIGHT
Copyright © 2003-2007 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
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 0.19.8.1 June 2016 ENVSUBST(1)