1. Java 1.5 or latest [ http://java.sun.com ]
2. Mysql 5.x [ http://www.mysql.com ]
3. Tomcat 5.5.x [ http://tomcat.apache.org/]

Installation [Everything has to be done in root mode ]
1. Download the Unitime source file from http://www.unitime.org/ webiste

2. Extarct the tar file into /opt/unitime folder [ #mkdir /opt/unitime]

#tar -xzvf unitime-3.1_bld248.tar.gz  -C /opt/unitime

3. Start your mysql server

#/etc/init.d/mysqld start

4. Import sql file into mysql server [located in /opt/unitime/doc/mysql folder]

[ Note : MySQL is case sensitive on table names by default. To change this, add the following line to the /etc/my.cnf file. This forces MySQL to translate all table names to lowercase before executing the statement.]

lower_case_table_names=1

# mysql -u root -p -f </opt/unitime/doc/mysql/schema.sql
# mysql -u root -p  </opt/unitime/doc/mysql/woebegon-data.sql

5. Connect  mysql client and create the user for timetable database [ the default username is timetable and password is unitime ] , run the following queries in mysql client window.

update mysql.user set host=’localhost’ where user=’timetable’;
update mysql.user set password=PASSWORD(‘unitime’) where user=’timetable’;
commit;
grant all on timetable.* to timetable;
flush privileges;

I have given sample mysql client window and queries

[root@localhost ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 12 to server version: 5.0.22

Type ‘help;’ or ‘\h’ for help. Type ‘\c’ to clear the buffer.

mysql> update mysql.user set host=’localhost’ where user=’timetable’;
Query OK, 1 row affected (0.02 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> update mysql.user set password=PASSWORD(‘unitime’) where user=’timetable’;
Query OK, 0 rows affected (0.00 sec)
Rows matched: 1  Changed: 0  Warnings: 0

mysql> commit;
Query OK, 0 rows affected (0.00 sec)

mysql> grant all on timetable.* to timetable;
Query OK, 0 rows affected (0.02 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.02 sec)

mysql> exit
Bye

6. Copy the UniTime.war file into tomcat webapps folder

# cp /opt/unitime/web/UniTime.war /opt/apache-tomcat-5.5.29/webapps/

7. Create  a file called my_login.conf and add the following line

#gedit my_login.conf
Timetabling {
org.unitime.timetable.authenticate.jaas.DbAuthenticateModule required;
};

Save the file and exit.

8. Add the following paths at end of /etc/profile file

#gedit /etc/profile
export JAVA_OPTS=”${JAVA_OPTS} -Djava.security.auth.login.config=/opt/unitime/my_login.conf”
export JAVA_OPTS=”${JAVA_OPTS} -Djava.awt.headless=true”
export JAVA_OPTS=”${JAVA_OPTS} -Xmx512m”

9. Run the following command to set the path

#source /etc/profile

10. Now , its time to start your tomcat server

#/opt/apache-tomcat-5.5.29/bin/startup.sh

11. Open your web browser , type the follwoing address

http://localhost:8080/UniTime

12. If you get the login window , then evrything is ok , otherwise some problem with your installation. the default usename and password of unitime is

username : admin
password : admin

13. Have a fun with your university scheduling system !!!

This package allows for easy installation of the Microsoft True Type Core Fonts for the Web including:

• Andale Mono
• Arial Black
• Arial (Bold, Italic, Bold Italic)
• Comic Sans MS (Bold)
• Courier New (Bold, Italic, Bold Italic)
• Georgia (Bold, Italic, Bold Italic)
• Impact
• Times New Roman (Bold, Italic, Bold Italic)
• Trebuchet (Bold, Italic, Bold Italic)
• Verdana (Bold, Italic, Bold Italic)
• Webdings

You will need an Internet connection to download these fonts if you  don’t already have them.

GShutdown is an advanced shutdown utility which allows you to schedule the shutdown or the restart of your computer, or logout your actual session.

Installing GShutdown In Ubuntu

You can use Synaptic Package manager or Ubuntu Software center to install this software. or download the source code from http://gshutdown.tuxfamily.org site and install manually in your system.

GShutdown is a free software under the GPL license. The graphical user interface uses GTK+2.

Features :

• Compatible with GNOME, KDE and XFCE.
• Compatible with GDM and KDM to shutdown, reboot or close the current session, without being root.
• The ability to choose a command to stop the computer (like “sudo poweroff”, for example)
• Systray icon
• Visual notifications (to warn the user that his computer is going to be stopped in a few seconds !)
• Three different ways to schedule the turn off time : « at time and date », « after a delay », « now ».

1. Install Dependencies

To install OpenLink Virtuoso first of all following dependencies are needed-

First of all check all the dependencies whether installed or not. (Version is important!)

To check the version use following sequence.

1. Download and install Python 2.6 from Here (http://www.python.org/download/). for your appropriate windows (32 or 64 bit)
2. Download & Install wxPython (NOT wxWidgets) from Here. (http://www.wxpython.org/download.php)
3. Download & Install SPE from Here(http://developer.berlios.de/project/showfiles.php?group_id=4161). Get this file: “SPE-0.8.4.c-wx2.6.1.0-no_setup.zip”.
4. Unzip it to somewhere you will remember, but don’t rename the folder anything other than “_spe”.
5. Go inside the _spe directory and double click SPE.py.
6. At this point your  new SPE Python IDE should start up. Enjoy Python….

Note: you will have to set the environmental veritable in windows for python. For Xp user,

Right click on MyComputer=>Properties=>Advanced=>Environmental Variable

and then select “Path” and click edit, add the python directory (c:\Python26)

followed by a semi colon at the end of the variable Value.(eg- xxxxxx;C:\Python26)

• Download the latest driver from Broadcom website

http://www.broadcom.com/support/802.11/linux_sta.php

These packages contain Broadcom's IEEE 802.11a/b/g/n hybrid Linux® device driver for use with Broadcom's BCM4311-,                      BCM4312-, BCM4321-, and BCM4322-based hardware.

# mkdir hybrid_wl

# cd hybrid_wl

# tar xzf <path>/hybrid-portsrc.tar or <path>/hybrid-portsrc-x86_64.tar.gz

# make clean   (optional)

# make

# lsmod  | grep "b43\|ssb\|wl"

# rmmod b43

# rmmod ssb

# rmmod wl

# echo "blacklist ssb" >> /etc/modprobe.d/blacklist.conf

# echo "blacklist b43" >> /etc/modprobe.d/blacklist.conf

# rmmod wl

# mv <path-to-prev-driver>/wl.ko <path-to-prev-driver>/wl.ko.orig

# cp wl.ko <path-to-prev-driver>/wl.ko

# depmod

# modprobe wl

# modprobe lib80211

# insmod wl.ko

#vim /etc/profile

rmmod ssb

modprobe lib80211

insmod <path-to-wl.ko-file >/wl.ko

Reference : Broadcom Website

Oops , My Fedora dvd is getting struck .

What the hell is this ? why this DVD is not working  properly ?

Oh my God after 9 hours of downloading , I got problem with DVD .

Everyone could have murmured or shouted these words them self while they are facing some problem with installing ISO images. Last week  i downloaded Fedora 12 DVD -3.0 GB. but i got problem with installation due to corrupted media . I spent one day for downloading that iso image , i dont know why this iso image get corrupted . any way i tried to find the answer .  Finally i found some tips and tricks with downloading ISO images.

Reason for corrupted ISO images

1. Download Interruption or incomplete download – Use proper download manager or accelerator for downloading ISO images.
2. The ISO image might be corrupted while burning with high speed . So use 2x /4x speed in your burning application to avoid this problem
3. Forget to check with hash code  – All ISO images comes with some hash code for checking its content . user need to check after download it.

Checking ISO images using SHA1SUM or MD5SUM

The first two problem could be easily solved using download manager and setting burning speed . here some information about checking ISO image has been given for Linux users

• Download ISO images , For example :  Fedora-12-i386-DVD.iso
• Download the MD5SUM or SHA1SUM hash keys from fedora website – Save the second line into one text file [check.txt]

Hash: SHA1
f0ad929cd259957e160ea442eb80986b5f01daaffdbcc7e5a1840a666c4447c7 *Fedora-12-i386-DVD.iso

• Now use sha1sum or md51sum command for checking your ISO image . In terminal type the following command

# sha1sum    -c check.txt

or

# md5sum    -c check.txt

• If the file has no error then the output of above commands would be

Fedora-12-i386-DVD.iso: OK

• Else some error message would be displayed .

Note : The format of the checksum file is so important , it has to be like

<checksum value><TWO WHITESPACES><name of file to be checked>

In our case , the check.txt sould have

f0ad929cd259957e160ea442eb80986b5f01daaffdbcc7e5a1840a666c4447c7  Fedora-12-i386-DVD.iso

Compiling Linux Kernel is used for making your system as very customizable one . User can change kernel modules and device drivers based on their need . Suppose if i want to disable wireless support in my desktop PC [because wifi card is not available in my system] . i can recompile and disable that option in my existing kernel. In this article , the kernel compilation has been described in Six Easy Steps

Press Alt+F2 and enter gnome-terminal command.And continue by entering :

$sudo fdisk -l
This will show your partition table.Here is my table to understand it better :
/dev/sda1 29 8369 66999082+ 83 Linux
/dev/sda2 * 8370 13995 45190845 7 HPFS/NTFS
/dev/sda3 13996 14593 4803435 5 Extended
/dev/sda5 13996 14593 4803403+ 82 Linux swap / Solaris

Now i will mount Linux (sda1 here), i have no external boot partition as you can see.(IF YOU HAVE external one, do not forget to mount it! )

$sudo mount /dev/sda1 /mnt
$sudo mount –bind /dev /mnt/dev
$sudo mount –bind /proc /mnt/proc

The following command is optional (it copies resolv.conf)

$sudo cp /etc/resolv.conf /mnt/etc/resolv.conf

Now chroot into the enviroment we made :

$sudo chroot /mnt

After chrooting, you do not need to add sudo before your commands because from now, you will run commands as root.
You may want to edit /etc/default/grub file to fit your system (timeout options etc)

#nano -w /etc/default/grub

Play with the options if you want.(But do not forget to give grub-update command if you saved it )

Now install/recover Grub2 via :

#grub-install /dev/sda

However you may get errors with that code like me.If so please use this command :

#grub-install –recheck /dev/sda

Now you can exit the chroot, umount the system and reboot your box :

#exit
$sudo umount /mnt/dev
$sudo umount /mnt/proc
$sudo umount /mnt
$sudo reboot

Rajarajan is a software developer, writes about useful technical information on his blog.

Typing Tamil  in Firefox Browser

1. You need “TamilVisai” [ old name was Tamilkey] addon for typing Tamil in firefox, so click the link given below , in that page select “Add to Firefox” button.

Click here to Install Tamil Visai Addon for Firefox

2. Now Another pop-up window will open , There u select “install”  button . Installation will take one or two minutes [Based on your Internet Speed]

3. After installing TamilVisai Restart Your firefox.

4. If you want to type in tamil in any text box or text area , simply right click on your mouse and select  Tamil vissai option  or press Alt+F8 . based on your type wring method .you can choose any one of the type options , If you know Tamil typewriting then choose Tamill99 option , otherwise choose Anjal [Based on phonetics].

5. For Type in English Press F9