– Do neatly logout of their web application, before switching machines. As they keep the records, which would not let you login using a different machine till a session timeout which ranges from 0.5 to 6 hours.
– Spoof Your MAC Address, if you are using multiple laptops/desktops
use ifconfig utility:
MAC address can be changed very easily using ifconfig. Run the following command as root user.
#ifconfig eth0 down hw ether address
eth0 is the name of the interface/NIC which address is to be changed.
down means the NIC is to be shutdown before changing address.
hw ether means hardware address class is ether(which indicates ethernet).
address is the address which will used as the new mac.
After the successful execution of the command. start the NIC again using the command:
# /sbin/ifconfig eth0 up
– Release your IP after successful log out
# dhclient -r -pf < path to the current dhclient pid file >
The path of current dhclient pid file can be found using
# ps -eaf | grep dhclient
Path is usually /var/run/dhclient-eth0.pid or /var/run/dhclient-wlan0.pid
=> Get a large packet of Haldiram Bhujia Sev
 |
| From Food |
=> Get two tomatoes, two onion, 4 lemons, 1-2 green chillies, black pepper powder etc
 |
| From Food |
=> Cut the tomatoes and onion in small pieces and lemon into 2 halves as shown below
 |
| From Food |
=> Mix onion and tomatoes in a large bowl
 |
| From Food |
=> Add black pepper ( don’t add too much of it, as it may upset the stomach)
 |
| From Food |
=> Squeeze all the lemon in a different bowl and remove the seeds
 |
| From Food |
=> Empty the haldiram bhujia sev pack in the bowl containing onion and tomatoes
 |
| From Food |
=> Add the lemon juice in the mixture and mix well.
 |
| From Food |
=> Add topping of coriander leaves and nicely cut green chillies, mix well and it is ready to serve
 |
| From Food |
The chef can be reached here
]]>Huntplace as the name suggests let’s you hunt for the place where you want to go . It basically aggregates/mines the data from resourceful and rich web applications like Flickr, Youtube, Wiki, etc. and makes your life easier. Instead of stumbling upon those stale and old sites, get the data from the popular and reliable sources. It is a mashup that calls the pulic APIs and let’s u explore your travel destination based on the content received.
The whole idea is in a very early phase and has been implemented. There are bunch of enhancements and ramifications that can be done.
]]>Download the new version’s (say FC 10) iso(DVD) image and save it to a disk drive partition. I used a pen drive for the same. It works very well for filesystems viz. FAT32,ext2 and not NTFS. Copy the image file to any directory say for example /mnt/FedoraCoreDVD.iso( Assuming, that pen drive is mounted at /mnt) . Mount the iso image in a directory(any) to extract the isolinux folder.
#mount -o loop /mnt/FedoraCoreDVD.iso /home/user/Fedora/
Copy the isolinux folder and paste it inside the boot folder.
#cp -r /home/user/Fedora/isolinux /boot
Now we need to make an entry in the grub file to boot the copied isolinux folder’s install.img
# cat /etc/grub.conf
______________________________
title Fedora Upgrade
root (hd0,8) ———–> should be your partition containing the current linux installation (0->First Hard Drive,8-> Partition number on this drive )
kernel /isolinux/vmlinuz
initrd /isolinux/initrd.img
______________________________
Copy the isolinux folder also to the pen drive(/dev/sdb, mounted at /mnt in this case) and reboot the system. Select the ” Fedora Upgrade” option in grub and the normal installation/upgrade demon anaconda will start. It will ask for the option of disk partition and folder containing the iso image and iso linux folder, which is /dev/sdb1 in this case. Select the same and the upgradation works like a charm.
]]>
in unauthenticated mode. I was just going through the squid logs at /var/logs/squid/access.log, and I saw few miscreant IPs eating up my network bandwith by using our proxy server. Then, I decided to tune up the authentication mode for squid proxy server. Squid doesn’t have its authentication module and we need to us LDAP,PAM or NCSA. I came accross NCSA based authentication at http://www.cyberciti.biz/tips/linux-unix-squid-proxy-server-authentication.html. Given below. It worked very well in our case.
Configure an NCSA-style username and password authentication
I am going to assume that squid is installed and working fine.
Tip: Before going further, test basic Squid functionality. Make sure squid is functioning without requiring authorization
Step # 1: Create a username/password
First create a NCSA password file using htpasswd command. htpasswd is used to create and update the flat-files used to store usernames and password for basic authentication of squid users.
# htpasswd /etc/squid/passwd user1
Output:
New password:
Re-type new password:
Adding password for user user1
Make sure squid can read passwd file:
# chmod o+r /etc/squid/passwd
Step # 2: Locate nsca_auth authentication helper
Usually nsca_auth is located at /usr/lib/squid/ncsa_auth. You can find out location using rpm (Redhat,CentOS,Fedora) or dpkg (Debian and Ubuntu) command:
# dpkg -L squid | grep ncsa_auth
Output:
/usr/lib/squid/ncsa_auth
If you are using RHEL/CentOS/Fedora Core or RPM based distro try:
# rpm -ql squid | grep ncsa_auth
Output:
/usr/lib/squid/ncsa_auth
Step # 3: Configure nsca_auth for squid proxy authentication
Now open /etc/squid/squid.conf file
# vi /etc/squid/squid.conf
Append (or modify) following configration directive:
auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd
auth_param basic children 5
auth_param basic realm Squid proxy-caching web server
auth_param basic credentialsttl 2 hours
auth_param basic casesensitive off
Also find out your ACL section and append/modify
acl ncsa_users proxy_auth REQUIRED
http_access allow ncsa_users
Make sure that you do not have any other http_access statement.
Save and close the file.
Where,
* auth_param basic program /usr/lib/squid/ncsa_auth /etc/squid/passwd : Specify squid password file and helper program location
* auth_param basic children 5 : The number of authenticator processes to spawn.
* auth_param basic realm Squid proxy-caching web server : Part of the text the user will see when prompted their username and password
* auth_param basic credentialsttl 2 hours : Specifies how long squid assumes an externally validated username:password pair is valid for – in other words how often the helper program is called for that user with password prompt. It is set to 2 hours.
* auth_param basic casesensitive off : Specifies if usernames are case sensitive. It can be on or off only
* acl ncsa_users proxy_auth REQUIRED : The REQURIED term means that any authenticated user will match the ACL named ncsa_users
* http_access allow ncsa_users : Allow proxy access only if user is successfully authenticated.
Restart squid:
# /etc/init.d/squid restart
.
language.
So folks, if you use firebug with firefox , better be watchful else keep scratching your head.
]]>No. 72. Rakesh Gupta
No. 73. ….. and so on.
Hurray ! I was floating on cloud nine . I had made in to the company . The on campus drive at my college hyped as arduous process had been a cake walk for me. The faculty member read loud the list of the students who had made in. Celebrations were inevitable . 24th September 2006 :
Hey, did you collect the offer letter ? No, have they come? Cool. Having an offer letter in your hands of a big shot MNC, with a year more still left to complete your engineering degree, sounds fantastic. I had made my mind, I will join it. Become a fundoo coder shoder !! All things seemed to be so perfect. My future path was decided. But, I failed to realise that heavenly signal. As they say in literature, when you desire something, universe conspires to let you have the best. But, I was blinded by the charm and glamor and was not able to see that I had something better to achieve. 10th May 2007 – 25th June 2007:
Desperate wait for the receiving the joining letter at the company. As the history says, it should be something in the middle of June. Perhaps, this was one of the firsts of heavenly signal which I failed to realise. The signal that I am destined for something better and I should seek or continue with some other opportunity. 1st July 2007:
For the first time on the college’s history, a database giant had arrived interviewing our batch. The coll was over and everyone was relaxing at home. But the offering and name of the database giant tempted everyone to rush back to the campus from even their remotest abodes and try their knowledge and luck. The selection process was strenuous and I was pleased to make into top 18 out of the 500 people appeared. But unfortunately, they needed only 12 folks. Hence, had a narrow setback. I was disappointed, but this was another heavenly indicator that destiny has something else in store for me and I should realize my potential. 10th July 2007:
The joining date of the company came(23rd July). As expected, it was in their huge training campus. I had mixed feelings. But, I had made my mind and was careless to hunt for any other opportunities. 17th July 2007:
The company had altered the joining date and location to 6th August, to a place where I had never been too. Perhaps, this was the biggest heavenly indicator. Again, I could not sense it. What could I do ? I was not seeing things beyond joining this company, which eventually turned out to be a big mistake of my life. I have been avid passionate about Java and Open Source technologies since my college days. With an expectation of getting similar kind of work/training, I joined the company at the new location 6th August 2007:
Lush green campus and huge glassy buildings, good enough to dupe anyone. I was joyous. The training process started and things went on smoothly. Till one fine day, we had the catastrophic event …. MAINFRAMES, yes your batch has been identified for the mainframes stream. Happy hunting folks, Its gonna be a wonderful time. Man, I was shattered, I never desired to study those outdated legacy systems. The company was not willing to cater to your personal interests. 10th October 2007:
I started pumping my resume like anything. I wanted to get out and do anything but not mainframes. Ill-fated, nothing much happened. Only ray of hope was to complete training and expect to get a different technology project. Chances are meager, but you never now. 1st Feb 2008:
After successful completion of training, off to production. Seems, a whole new world is going to start. Fortunately, I managed to sneak into a non mainframe project after persuading one of the managers at the company. New energy and enthusiasm started to reverberate again in me. 10th April 2008:
All that glitters is not gold. I could perfectly understand that. This one was the biggest and best heavenly indicators, you need to work hard, you are destined for something else. Now I started feeling it hard. The project, they call it support and maintenance barely requires you to be smart, logically and technically sound. There was nothing much crucial I was playing. It started striking me that I am losing, losing rapidly; everything, my knowledge, my analytical and logical skills. What would my future be ? A dumb box. Oh no ! I won’t let that happen. Job hunt began with more fierce efforts. I needed to move out. No kidding this time. It’s a high priority to give justice to my career life. 15th July 2008:
Filed the resignation, a sense of relief or moksha. 20th August 2008:
I walkout like a free bird. With lesser apprehensions about my next venture.
The following code draws a circle of particular diameter by setting the PIXELS falling inside the circle to a different RGB value. It involves simple co-ordinate geometry fundas. There are some approximations being taken.
import java.awt.image.*;
import javax.swing.*;
import javax.swing.JComponent.*;
public class circles extends JFrame {
public static void main(String args[]) {
double d=Double.parseDouble(args[0]);
int diameter= (int)d;
circles ca= new circles();
ca.drawCircle(diameter);
}
public void drawCircle(int diameter) {
int x=0,y=0,radius;
JFrame frame=new JFrame();
JLabel lab;
BufferedImage bi=new BufferedImage (diameter,diameter,BufferedImage.TYPE_BYTE_GRAY );
WritableRaster raster=bi.getRaster();
double [] iPix=new double [diameter*diameter];
if(diameter%2 == 1) {
diameter-=1;
}
radius=diameter/2;
for(int i=0;i(radius)){
y=y%(radius);
}
else
{
y-=radius;
y=-y;
}
if((x*x+y*y)<=((radius)*(radius))) { iPix[i]=255; } else { iPix[i]=0; } }
raster.setPixels(0,0,diameter,diameter,iPix); lab=new JLabel(new ImageIcon(bi)); frame.add(lab);
frame.setVisible(true); frame.setSize(600,600);
}
}
compile the program as javac circles.java
run as java circles diameter_value
e.g. java circles 500
]]>