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Full Discussion: Adding lines at a particular location in a file.
Top Forums Shell Programming and Scripting Adding lines at a particular location in a file. Post 302897888 by Yoda on Wednesday 16th of April 2014 03:31:26 PM
Old 04-16-2014
Using shell builtins:
Code:
#!/bin/bash

while read line
do
        printf "%s\n" "$line"
        if [[ "$line" =~ "ingredient" ]]
        then
                [ -z "$flag" ] && cat items.txt
                flag=1
        fi
done < fruits.txt

This User Gave Thanks to Yoda For This Post:
Pradeep_1990
 

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LEARN ABOUT DEBIAN

cereal-admin

CEREAL-ADMIN(8) 					      Administration Commands						   CEREAL-ADMIN(8)

NAME

       cereal-admin - administer cereal sessions

SYNOPSIS

       cereal-admin command [args]

DESCRIPTION

       cereal-admin is a program to administer cereal sessions.  A cereal session is a special (restricted) screen(1) session attached to a serial
       terminal.  Each cereal session is owned by a particular user (USER) who is allowed to "attach" to the cereal screen  session  and  interact
       with the specified serial terminal via screen.  Each cereal session is also associated with a particular log group (LOGGROUP) whose members
       are allowed to "follow" the logs of the session.

       Cereal was designed to monitor serial lines connected to the serial consoles of remote machines.  The cereal system is outlined at:

	  http://cmrg.fifthhorseman.net/wiki/cereal

SUBCOMMANDS

       cereal-admin takes various subcommands:

       create SESSION TTY BAUD USER LOGGROUP
	      Create a new session named SESSION on tty TTY, with baud rate BAUD.  USER is the user that will own the session, and LOGGROUP is the
	      group  that  will  be  able  to  follow  the  session non-interactively (ie. read the logs).  Once created, the session will be in a
	      "stopped" state.	`c' may be used in place of `create'.

       start [options] SESSION [SESSION]...
	      Start session(s).  For each session specified, the session directory is registered in the runsvdir directory.   The  screen  session
	      will  be	attached to the serial terminal and logging of the terminal will begin.  `s' may be used in place of `start'.  options: -a
	      (--all) to enable all sessions.

       restart [options] SESSION [SESSION]...
	      Restart session(s).  This sends running sessions a "restart" signal, and starts session that are not running.  This can be used when
	      changes  have  been  made to the screenrc, for instance.	`r' may be used in place of `restart'.	options: -a (--all) to disable all
	      sessions, -r (--running) to restart just the currently running sessions.

       stop [options] SESSION [SESSION]...
	      Stop session(s).	This kills the screen session attached to the serial terminal by sending it an "exit" signal, and then unregister-
	      ing the session directory from the runsvdir directory.  `k' may be used in place of `stop'.  options: -a (--all) to disable all ses-
	      sions.

       destroy [options] SESSION [SESSION]...
	      Destroy session(s) entirely.  This will destroy the session directory, including all history of the session and the logs.   `d'  may
	      be used in place of `destroy'.  options: -a (--all) to remove all sessions.

       list [SESSION]...
	      List session(s).	With no arguments, will list all sessions.  The leading three characters in the list indicate: whether the session
	      is running (+) or not (-) or in some unknown state (?), whether the user can attach to the session (a) or not (-), whether the  user
	      can  follow  the	session (f) or not (-).  If the session state is unknown (?), it's usually because the user asking for information
	      about the session can't read the session stat file.  `l' may be used in place of `list'.

       help   Output a brief usage summary.  `h' or `?' may be used in place of `help'.

LOGS

       Logs are handled by svlogd.  For information on how to control session log handling, please see svlogd(8) and/or  log-limits.txt  from  the
       documentation of this package.

FILES

       /etc/cereal/screenrc
	      Default cereal screenrc file.

       /etc/cereal/cereal-admin.conf
	      Configuration file to set parameters for session creation and management.

       /var/lib/cereal/sessions/$SESSION/screenrc
	      Special screenrc file for session SESSION.  The presence of this file overrides the default screenrc file /etc/cereal/screenrc.

EXIT STATUS

       Exit status is 0 if OK, 1 if minor problems, 2 if serious trouble.

AUTHOR

       Written by Jameson Rollins and Daniel Kahn Gillmor.

BUGS

       If  the invoking user does not have read and execute access to the cereal session's supervise directory, `cereal-admin list' may not always
       indicate that session's status accurately.

REPORTING BUGS

       Report bugs to <cereal@fifthhorseman.net>.

COPYRIGHT

       Copyright (C) 2007 Jameson Rollins and Daniel Kahn Gillmor
       This  is  free  software.   You	 may   redistribute   copies   of   it	 under	 the   terms   of   the   GNU	General   Public   License
       <http://www.gnu.org/licenses/gpl.html>.	There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       cereal(1), screen(1), runsvdir(8), svlogd(8)

cereal-admin 0.1						    March 2007							   CEREAL-ADMIN(8)
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