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Full Discussion: Adding or deleting an entry in /etc/inittab without using vi editrors or any editor.
Operating Systems Linux Red Hat Adding or deleting an entry in /etc/inittab without using vi editrors or any editor. Post 302412444 by mark54g on Monday 12th of April 2010 02:10:08 PM
Old 04-12-2010
You can also do it in perl after making a backup of the file

Code:
#!/usr/bin/perl 
# or wherever your perl is

use File::Copy;
my $orig = "yourfile";
my $backup = "yourfile.bak";

copy($orig, $backup);

open(IN, "< $backup");
open OUT, "> $orig");

my $newsetting = "your new line";

while ($line = <IN>)
    {
        if($line =~ m#"$newsetting)
            {
                $newline = "$newsetting";
                print OUT "$newline\n";
            }
        else
            {
                print OUT "$line";
            }
    }
close(OUT);
close(IN);

Last edited by mark54g; 04-12-2010 at 03:26 PM.. Reason: Clean up braces, forgot to add file copy module below comments
 

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LEARN ABOUT CENTOS

backup_help

BACKUP_HELP(8)						       AFS Command Reference						    BACKUP_HELP(8)

NAME

       backup_help - Displays help for backup commands

SYNOPSIS

       backup help [-topic <help string>+] [-admin] [-help]

       backup h [-t <help string>+] [-a] [-h]

DESCRIPTION

       The backup help command displays the complete online help entry (short description and syntax statement) for each operation code specified
       by the -topic argument. If the -topic argument is omitted, the output includes the first line (name and short description) of the online
       help entry for every backup command.

       To list every backup command whose name or short description includes a specified keyword, use the backup apropos command.

OPTIONS

       -topic <help string>+
	   Indicates each command for which to display the complete online help entry. Omit the backup part of the command name, providing only
	   the operation code (for example, specify dump, not backup dump). If this argument is omitted, the output briefly describes every backup
	   command.

       -help
	   Prints the online help for this command. All other valid options are ignored.

OUTPUT

       The online help entry for each backup command consists of the following two or three lines:

       o   The first line names the command and briefly describes its function.

       o   The second line lists aliases for the command, if any.

       o   The final line, which begins with the string "Usage", lists the command's options in the prescribed order. Online help entries use the
	   same symbols (for example, brackets) as the reference pages in this document.

EXAMPLES

       The following example displays the online help entry for the backup dump command:

	  % backup help dump
	  backup dump: start dump
	  Usage: backup dump -volumeset <volume set name> -dump <dump level name>
	  [-portoffset <TC port offset>]  [-at <Date/time to start dump>+]
	  [-append]  [-n]  [-file <load file>]	[-help]

PRIVILEGE REQUIRED

       None

SEE ALSO

       backup(8), backup_apropos(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							    BACKUP_HELP(8)
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