envsubst - substitutes environment variables in shell format strings


   envsubst [OPTION] [SHELL-FORMAT]


   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.


   Written by Bruno Haible.


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


   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.


   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.

More Linux Commands

intel_upload_blit_large_map(1) - microbenchmark of Intel GPU
intel_upload_blit_large_map is a microbenchmark tool for DRM performance. It should be run with kernel modesetting enabled, and may require root privilege for c

trivial-rewrite(8) - Postfix address rewriting and resolving
The trivial-rewrite(8) daemon processes three types of client service requests: rewrite context address Rewrite an address to standard form, according to the ad

glColor4dv(3gl) - set the current color - Linux manual page
The GL stores both a current single-valued color index and a current four-valued RGBA color. glColor sets a new four-valued RGBA color. glColor has two major va

aio_write(3) - asynchronous write - Linux manual page.......
The aio_write() function queues the I/O request described by the buffer pointed to by aiocbp. This function is the asynchronous analog of write(2). The argument

ber_alloc_t(3) - OpenLDAP LBER simplified Basic Encoding Rul
ber_alloc_t.3 - These routines provide a subroutine interface to a simplified implementation of the Basic Encoding Rules of ASN.1. The version of BER these rout

flushinp(3ncurses) - miscellaneous curses utility routines
The unctrl routine returns a character string which is a printable representation of the character c, ignoring attributes. Control characters are displayed in t

getchar_unlocked(3) - nonlocking stdio functions (Man Page)
Each of these functions has the same behavior as its counterpart without the _unlocked suffix, except that they do not use locking (they do not set locks themse

FcConfigUptoDate(3) - Check timestamps on config files......
Checks all of the files related to config and returns whether any of them has been modified since the configuration was created. If config is NULL, the current

tiff2ps(1) convert a TIFF image to PostScripttrade..........
tiff2ps reads TIFF images and writes PostScript or Encapsulated PostScript (EPS) on the standard output. By default, tiff2ps writes Encapsulated PostScript for

attr_setf(3) - set the value of a user attribute of a filesy
The attr_set and attr_setf functions provide a way to create attributes and set/change their values. Path points to a path name for a filesystem object, and fd

ber_get_null(3) - OpenLDAP LBER simplified Basic Encoding Ru
These routines provide a subroutine interface to a simplified implementation of the Basic Encoding Rules of ASN.1. The version of BER these routines support is

vimdiff(1) - edit two, three or four versions of a file with
vimdiff.1 - Vimdiff starts Vim on two (or three or four) files. Each file gets its own window. The differences between the files are highlighted. This is a nice

We can't live, work or learn in freedom unless the software we use is free.