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Full Discussion: Add a space between certain characters Using Perl Scripting
Top Forums Shell Programming and Scripting Add a space between certain characters Using Perl Scripting Post 302635331 by birei on Friday 4th of May 2012 03:58:19 PM
Old 05-04-2012
Hi smarty86,

One way:
Code:
$ cat script.pl
use warnings;
use strict;

while ( my $var = <DATA> ) {
        chomp $var;
        $var =~ s/((?:[[:upper:]],){3})(?!$)/$1 /g;
        printf qq[%s\n], $var;
}

__DATA__
A,B,C,D,E,F,G,H
A,B,C
A,B,C,D,E,F
$ perl script.pl
A,B,C, D,E,F, G,H
A,B,C
A,B,C, D,E,F

 

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LEARN ABOUT LINUX

motd.tail

MOTD.TAIL(5)						   Debian Administrator's Manual					      MOTD.TAIL(5)

NAME

       motd.tail - Template for building the system message of the day

DESCRIPTION

       On Debian systems, the system message of the day is rebuilt at each startup, in order to display an accurate information. /etc/motd.tail is
       the file to edit permanent changes to the message of the day.

OVERVIEW

       The initiation script /etc/init.d/bootmisc.sh prepends a line containing information about the system  to  /etc/motd.tail  and  stores  the
       resulting  file in /var/run/motd. /etc/motd is a symbolic link to /var/run/motd.  This is done to prevent changes to /etc as the system can
       not assume /etc to be writable.

       Changes to /etc/motd effectively end up in a file under /var/run which will be regenerated upon reboot.

       A symbolic link to a different file, such as /etc/motd.static disables this behaviour.

FILES

       /etc/init.d/bootmisc.sh
	      The initiation script which builds /var/run/motd

       /etc/motd
	      Symbolic link to the system message of the day at /var/run/motd

       /etc/motd.tail
	      Template for building the system message of the day

       /var/run/motd
	      System message of the day file rebuilt at each computer start

SEE ALSO

       login(1), issue(5), motd(5).

Debian								    2007-04-28							      MOTD.TAIL(5)
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