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Full Discussion: Insert content of file before the first occurrence of a line starts with a pattern in another file
Top Forums Shell Programming and Scripting Insert content of file before the first occurrence of a line starts with a pattern in another file Post 302982692 by disedorgue on Sunday 2nd of October 2016 12:09:44 PM
Old 10-02-2016
Hi,
Another way with gnu sed:
Code:
$ cat f1.txt 
working on linux
its unix world
working on unix
its linux world
unix is best          --> first occurrence of line starts with unix
linux is easy
unix is easy
unix is best
linux is best

Code:
$ cat f2.txt 
Here is my content
i want to insert this

Code:
$ sed -e '0,/^unix/{/^unix.*/s//cat f2.txt;echo "&"/e;}' f1.txt
working on linux
its unix world
working on unix
its linux world
Here is my content
i want to insert this
unix is best          --> first occurrence of line starts with unix
linux is easy
unix is easy
unix is best
linux is best

Regards.
Last edited by disedorgue; 10-03-2016 at 05:36 AM.. Reason: to correct error noticed by scrutinizer
This User Gave Thanks to disedorgue For This Post:
Scrutinizer
 

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LEARN ABOUT CENTOS

uml_switch

UML_SWITCH(1)                                                 General Commands Manual                                                UML_SWITCH(1)

NAME

       uml_switch -- switch daemon for user-mode Linux

SYNOPSIS

       uml_switch [-unix control_socket data_socket]  [-hub]  [-tap tun device]  [-compat-v0]  [-daemon]

DESCRIPTION

       This manual page documents briefly the uml_switch program.

       This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

       uml_switch is a daemon for managing a virtual network between user-mode Linux systems, with no connection to the host system's network.

       It will listen for connections on a pair of UNIX domain sockets, and forward packets between clients which connect to them.

OPTIONS

       -unix control_socket data_socket
                 Listen on the specified pair of sockets, instead of the defaults.

       -hub      Act  like  a hub.  This means that packets received will be broadcast over all virtual links.  The default is to act as a switch,
                 where packets are only sent to the link matching the destination MAC address of the packet.

       -tap tap device
                 Connect the switch to a dynamically created tap device on the host

       -compat-v0
                 Specify control protocol version 0 compatibility.

       -daemon   Run in the background as a daemon.

SEE ALSO

       linux(1)

       The UserModeLinux-HOWTO (link to URL http://user-mode-linux.sourceforge.net/UserModeLinux-HOWTO.html)

AUTHOR

       uml_switch was written by Jeff Dike and others.

       This manual page was written by Matt Zimmerman mdz@debian.org for the Debian GNU/Linux system (but may be used by others).   Permission  is
       granted  to  copy,  distribute  and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later
       version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts and no Back-Cover Texts.

                                                                                                                                     UML_SWITCH(1)
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