Web | This Site

Unix for Beginners
Unix Shell Programming
Advanced Unix
Unix Useful References
Unix Useful Resources
Selected Reading
© 2011 TutorialsPoint.COM

| Home |  | References |  | Discussion Forums |  | About TP

# envsubst - Unix, Linux Command

# NAME

envsubst - substitutes environment variables in shell format strings

# SYNOPSIS

envsubst [OPTION] [SHELL-FORMAT]

# DESCRIPTION

Substitutes the values of environment variables.

## Operation mode:

Tag | Description
--- | ---
-v, --variables
| output the variables occurring in SHELL-FORMAT

## Informative output:

Tag | Description
--- | ---
-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 © 2003-2005 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

# SEE ALSO

envsubst is maintained as a Texinfo manual. If the info and envsubst programs are properly installed at your site, the command

Tag | Description
--- | ---
| info envsubst

should give you access to the complete manual.

Advertisement

Online Image Processing

Indian Baby Names