The error message was

NONE/400 3505 GET / – NONE/- text/html

Solution :

#vi /etc/squid3/squid.conf

put the word “transparent so the line should look like below

http_port  172.16.26.1:3128 transparent

then /etc/init.d/squid3 restart

Every thing is hunky-dory

Have Fun

Then I did the following to troubleshoot

Step1. grub> set root=(hd0,1)                                       #  / (root) partition was /dev/sda1

Step2. grub> linux  /vmlinuz root=/dev/sda ro

step 3 grub> initrd /initrd.img

step3. grub>boot

Machines rebooted

on the command prompt as a root

#grub-install  /dev/sda
Rebooted again. Its done.

Reference: https://help.ubuntu.com/community/Grub2/Troubleshooting

To limit Quota ( I have just allotted 2GB will increase later on)

iptables -I FORWARD 5  -s 172.16.0.33 -p tcp -m quota –quota 2147483648 -j ACCEPT

iptables -I FORWARD 6  -s 172.16.0.33  -j DROP

For quota ofcourse i have to reset the quota again. I will try to automate it some how

To limit time

iptables -I FORWARD 7 -s 172.16.0.33 -p tcp -m multiport –dport http,https -o eth0 -i eth1     -m time –timestart 16:00 –timestop 18:00 –weekdays Mon,Tue,Wed,Thu,Fri,Sat,Sun -j ACCEPT

Reference:  http://linuxgazette.net/108/odonovan.html

(Above said link had a little typo in time based rule is –days instead of –weekdays

Even making changes for  ACL’s in Apache conf result noting.

Google is always our friend.The link shown below explained about the bug.

http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626462

I have changed file as shown

Added the index.html in /etc/apache2/conf.d/nagios3.conf. So the line should be

DirectoryIndex index.php  index.html

not

DirectoryIndex index.php

/etc/init.d/apache2 restart

Done!

Have Fun

Do the following on both  Load Balancers ( I did it on Nginx LBs)

1. apt-get install ucarp

2. vi  /etc/network/interfaces and append the lines starting from ucarp-vid 3

3. replace password and ip (192.168.69.11) with your own

4. Reboot

I have followed the link below. Tested it by shutting down both Load Balancers one by one.

Will dig more in to it. It is Awesome!.

Reference http://forsetti.wordpress.com/2011/09/10/ucarp-and-squeeze/

Have Fun

http://aperiodic.net/screen/quick_reference

Have FUN

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1016838

This issue occurs when the .vmdk descriptor file is corrupt or missing. I my case it was corrupt.

Follow the Resolution heading in above said link. The step by step  procedure is given in the link below

http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1002511

In step 3 Instead of     scsi1.virtualDev = “lsilogic”

My Virtual server show me  scsi1.virtualDev = “lsilogic1068″

So the corresponding command ( vmkfstools -c 4294967296 -a lsilogic -d thin temp.vmdk ) does not work for me. But i had  replaced the  lsilogic1068 with lsilogic in command and it works fine. Rest is same and i followed step by step

It works awesome!

Have FUN!

I have done it on Debian squeeze. So first we have to install nginx package

#apt-get install nginx

Edit the nginx configuration file. Before editing,  I have copied the original nginx conf file as default.orig

#cd  /etc/nginx/sites-available/

#/etc/nginx/sites-available# cp default default.orig

#vi  /etc/nginx/sites-available/default

upstream mysite {
                server web1.meapay.com;
                server web2.meapay.com;
                }

server {

        server_name  http://www.meapay.com:80;
        #listen   [::]:80 default ipv6only=on; ## listen for ipv6
        access_log  /var/log/nginx/access.log;

        location / {
                proxy_pass http://mysite;
                proxy_set_header   Host $host;
        }

}

#/etc/init.d/nginx restart

Its done.

Have FUN

Reference:

http://mickeyben.com/blog/2009/12/30/using-nginx-as-a-load-balancer/

While making entry in /etc/fstab for newly created RAID device,  we need either device name (/dev/md7) or UUID. I got the UUID using the command

#mdadm –detail /dev/md7

and made the entry in fstab. But it did not worked as per  expectation

Searched Google about the problem as usual. I found that we have to use the UUID provided by the following command

#blkid /dev/md7

not by the command mdadm. Both UUID are different. It works. I have no idea why they are different. So please if you find please tell me as well.

Have FUN! again

As of Debian 6.0. Installer does not have sgdisk. So I had rebooted the machine from Gparted live cd. and ran the command given below.

Note that the /dev/sdb is destination drive and source is second device(/dev/sda) (exchange them at your own risk). It will copy partition layout from /dev/sda  to /dev/sdb

#sgdisk -R=/dev/sdb /dev/sda

The command below is required coz the first command copy/assign the same GUID to new device. So to assign another random unique GUID run the following command

#sgdisk -G /dev/sdb

Have FUN!