Name
envsubst
Synopsis
envsubst [options] [shell-format]
Substitutes environment variables in a shell string or script. When used with no options, copies stdin to stdout, replacing any environment variable string, such as $VARIABLE or ${VARIABLE}, with the appropriate environment variable value. So, “My editor is $EDITOR” would be converted to “My editor is /usr/bin/emacs.” Specifying a shell format limits the substitutions to those variables referenced in the shell format.
Options
- -h, --help
Print help message and then exit.
- -v, --variables
Display the variables referenced in the shell format, and then exit.
- -V, --version
Print version information and then exit.
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