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Full Discussion: Replace content from a file and save
Top Forums Shell Programming and Scripting Replace content from a file and save Post 302968292 by Don Cragun on Monday 7th of March 2016 03:30:23 PM
Old 03-07-2016
Try:
Code:
ed -s qm.ini <<-EOF
	g/LogBufferPages=0/s//LogBufferPages=4096/g
	w
	q
EOF

or:
Code:
ex -s qm.ini <<-EOF
	g/LogBufferPages=0/s//LogBufferPages=4096/g
	w
	q
EOF

On some systems, these might also rename the temp file to overwrite your original file (thereby changing the file's owner), but on most systems I think at least ed still does just what you ask it to do (rewrite the contents of the file instead of replace the file).
This User Gave Thanks to Don Cragun For This Post:
bdpl
 

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LEARN ABOUT MOJAVE

metacity

metacity(1)                                                        User Commands                                                       metacity(1)

NAME

       metacity, metacity--theme-viewer - GNOME desktop window manager, theme viewer for the metacity window manager themes

SYNOPSIS

       metacity [--sm-disable] [--sm-save-file=filename] [--display=display] [--replace] [--version]

       metacity-theme-viewer [theme-name]

DESCRIPTION

       metacity  is a fully integrated window manager that uses GTK+ for UI elements. metacity communicates closely with the panel and other desk-
       top elements. To configure metacity, use the GNOME preferences dialogs.

       metacity-theme-viewer is an application for testing and displaying metacity themes.

OPTIONS

       The following options are supported:

       --display=displaSpecify the remote X Display to be used by the window manager, where display is in the following format:

                       hostname:displaynumber.screennumber

       --help          Display detailed usage message. You can also use -? to specify this option.

       --replace       A metacity started with the ---replaceoption will replace an existing metacity.

       --sm-disable    Disable the connection to the session manager.

       --sm-save-file=fSpecifies the session management file to be used. By default, the $HOME/.metacity/sessions file is used.

       --version       Display the version information for the metacity command.

OPERANDS

       The following operands are supported:

       -theme-name     Specifies the theme that metacity should use. If no theme is specified on the metacity-theme-viewer command line,  metacity
                       loads the Crux theme. An error message is displayed if the theme does not exist.

EXAMPLES

       Example 1: Starting metacity From the Command Line When a metacity is Already Running

       example% metacity --replace

       Example 2: Starting metacity With a Non-Default Session Management File

       example% metacity --sm-save-file=filename

EXIT STATUS

       The following exit values are returned:

       0        Application exited successfully

       >0       Application exited with failure

FILES

       The following files are used by this application:

       /usr/bin/metacity       The command-line executable for the application.

       /usr/bin/metacity--themeTheecommand-line executable for the application.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWgnome-wm                 |
       +-----------------------------+-----------------------------+
       |Interface stability          |External                     |
       +-----------------------------+-----------------------------+

SEE ALSO

       Latest version of the GNOME Desktop User Guide for your platform.

NOTES

       Written by Laszlo Kovacs, Sun Microsystems  Inc., 2003.

SunOS 5.10                                                          2 Oct 2003                                                         metacity(1)
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