For example, I wanted to query the DNS results of a couple of sub domains (blog.gogoair.com, pr.gogoair.com, tracker.gogoair.com), I can do it the normal way (that 99% of us do )

 dig blog.gogoair.com

dig pr.gogoair.com

dig tracker.gogoair.com 

Or, I can use the for loop function and do this

 for i in {blog,pr,tracker}.gogoair.com; do echo "$i" ; dig +short "$i"; done 

Got to love technology .. Makes you lazy!!..err I meant to say productive.

Thx to Cliff for the inspiration.

The log files looked like this

0m0.107s
0m0.022s
0m0.015s
2011-01-05_02_22
0m0.102s
0m0.024s
0m0.014s
2011-01-05_02_23

I wrote the following perl script to get the log file to look as such

| 0m0.107s| 0m0.022s| 0m0.015s| 2011-01-05 | 02:22

| 0m0.102s| 0m0.024s| 0m0.014s| 2011-01-05 | 02:23 

perl script

#!/usr/bin/perl
# Modules to load
# use strict;
use warnings;

# Variables
my $inputFile = 'input.txt';
my $version = 0.1;

my $logFile = 'parsed_input.csv';

# Sub Functions
sub Log($$$);
sub Trim($);

# Clear the screen
system $^O eq 'MSWin32' ? 'cls' : 'clear';

# Open the output log file
open(LOGFILE,"> $logFile") || die "Couldn't open $logFile, exiting $!\n";

# Open the input file
open(INPUTFILE,"< $inputFile") || die "Couldn't open $inputFile, exiting $!\n";

# Process the input file, one line at a time
while (defined ($line = <INPUTFILE>)) {
	chomp $line;
	# Check for blank line
	if ($line =~ /^$/)
		{
			# Start a new line in the output
			print LOGFILE "\n";
		}
	else
		{
			# Split the date and time
			if ($line =~ /2011/)
				{
					@date = split (/_/,$line);
					print LOGFILE "| $date[0] | $date[1]:$date[2]";
				}
			else
				{
					# Write the value to the output
					print LOGFILE "| $line";
				}
		}
	}

I then took the parsed log files and imported them into the cloud based reporting engine provided by Zoho at http://reports.zoho.com

The final result are these reports

SERVER1

SERVER2

Did I say, I love technology?

I blogged the feature in Jboss to follow sym links here (http://kudithipudi.org/2008/07/25/howto-configure-jboss-to-follow-symbolic-links/). So essentially when Jboss was started, it was checking all the content in these network path to check for applications to deploy. And traversing a network share with 1000s of directories isn’t fun ..

We fixed it by making a simple edit to the start up script. Here’s the psuedo code for the script

1. Remove soft links to network share
2. Start Jboss
3. Put soft links to network share

And now the application starts in less than a minute .

I guess there might be other elegant ways to do this. i.e. Configure Jboss to only deploy certain applications, but this did the trick for us .

sub UnMountVolume($)
{
    my $mountPoint = $_[0];

    print "Unmounting $mountPoint\n";
	# Check if the mount point exists
	if ( grep m{$mountPoint}, qx{/bin/mount} )
	{
		#Let's try to unmount it
		system("/bin/umount $mountPoint");
	}
	else
	{
		print "$mountPoint is not mounted, so didn't have to do anything\n";
	}
}

As with any perl code, I am sure there are a tons of ways to do this in a more efficient and “cool” way.

/sbin/ifconfig | grep -B1 10.10.10.10 | awk '{if (NR==1) print $1}'

The same script can be changes a bit to support other operating systems too. Essentially, I am doing a grep (search) of the output of ifconfig, which shows all the network information on the system for a particular IP. At the same time, I am using the -B1 option, which will show the line above the matching line. Finally, I am piping this to awk and printing the first row in the first column.

close (SOURCE);
close (DESTINATION);


You are opening a file named source.xml, reading every line and if there is some text that matches “YYYYYYYY”, you are replacing the whole line with “XXXXXXXXXXXXXXXXXXX”. I am sure there are more elegant ways to write this .. but this will do the trick too..

So for example in your web app, you added a sym link to another directory, where most of your content is stored, Jboss would not show the content, when you go to the link.

Here’s a quick guide to fix this.

1. Go to the deploy folder of the context you want to configure. For example, if you used the default context, you go to $JBOSS_HOME/server/default/deploy/jboss-web.deployer
2. Edit the context.xml file and add allowLinking=”true” in the Context (NOTE : This allows Jboss to publish symbolic links on all apps in your application server, if you want to restrict it to just one particular app, you have to edit the context.xml in your specific application folder). Upon adding the option, our context.xml file looked as such

   

   
   org.jboss.web.tomcat.security.RunAsListener

More information on options for the context.xml can be found here

http://www.jboss.org/file-access/default/members/jbossweb/freezone/docs/2.1.0/config/context.html

For the record, Jboss configuration and accompanying documentation is what I call black magic .. Too many options, too many ways to do the same thing.

Here are the parameters I used

cht=bvg
chs=400×250
chtt=week+6+Training
chdl=Recommended+Miles|Actual+Miles
chco=ff0000,00ff00
chxt=x,y
chxr=1,0,15
chxl=0:|Mon|Tue|Wed|Thu|Fri|Sat|Sun|
chd=t:0,3,4,3,0,7,0|0,2,0,3,0,0,7
chbh=10

” Hey V, You can show the value of the bars by using the variable CHM”..

Thx for making me lazy dude .. Here’s the upated image