tag:blogger.com,1999:blog-61023843585528844532012-02-17T01:08:13.733+05:30Hacking the free world and some other stuffsmohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.comBlogger371100tag:blogger.com,1999:blog-6102384358552884453.post-90369590804487899572011-02-27T23:26:00.018+05:302011-03-06T21:33:22.577+05:30

On of the main purpose of using Latex is to write the math symbols and equations. There are lot of ways to write a given math in Latex, but it is better to follow some conventions . Here I describes how to put simple math equations and those spanning multiple line which needs special alignments, in Latex.To put a math equation inline(ie in the current line), we just have to enclose the equation

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-84586715628024969362010-10-31T23:04:00.007+05:302011-02-28T17:33:20.916+05:30

At the end of all your work, you have some data to show as your result. If you had worked on Scilab you just have to use plot2d() or plot3d() for plotting the data. For 2d data, plot2d() can be used. For 3d data, plot3d() can be used provided you know the third component for each combination of first two components ( ie you have z=f(x,y) for all x and y , then you can plot points(x,y,z) ).I had

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-76417475119717056232010-01-17T08:35:00.005+05:302010-01-17T08:48:59.611+05:30

Have you thought of keeping a calendar on your desktop so that you can see it without clicking anywhere. Then try the calendar Rainlendar . It is very easy to use and can be integrated to your desktop. It has a lot of options that can be configured. A lot of markers are available for highlighting an event. Still it has a simple interface and easy to use.

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-78552167241640340172009-12-30T16:36:00.004+05:302009-12-30T16:46:08.514+05:30

Port used by Pidgin for chatting is different from that of the web. In networks where only web proxy is allowed you have to change the port number. For using google talk, the different options can be configured as shown below

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-54710850550805400002009-11-01T11:00:00.003+05:302009-11-01T11:25:06.554+05:30

I have a wide screen laptop, but I want to get as much vertical space as possible. Here are some of the things I did for that purpose. Removed one of the panels. I removed the bottom panel. To retain the list of opened windows I added window list applet to top panel. The trash applet also you can add to top panel. For switching the desktop I uses keyboard short cuts (Ctrl+Alt+Arrow), so that is

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-52374549146012136082009-10-20T12:05:00.002+05:302009-10-20T13:00:00.211+05:30

Often we have to read input from the user through console and most of the time we need to read primitive types(int,long,float,char ...). For reading an array of integers as input , we often coded as shown below. That is we input was read as a string and converted to integer for using it. int[] array = new int[size]; try { BufferedReader br = new BufferedReader(new

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-29047450370464855822009-10-19T12:46:00.006+05:302009-10-19T13:51:34.343+05:30

The laptop users usually want switch their network when they move from place to place. The easiest way to do this is using the Network manager. You can configure more than one connection and select the one which you want at that moment.You might have seen the Network manager applet on your GNOME panel. You might have also noticed that it shows not connected even if your system is connected to

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-65040395068504417752009-08-04T20:54:00.004+05:302009-10-17T14:58:51.895+05:30

I have been searching for a good pdf reader in which I can highlight or underline the text I want. Such a functionality is useful for reading ebooks and reviewing papers. I tried many pdf readers like Evince),Kpdf(GNOMEKDE), Adobe acrobat reader, xpdf, Sumatra.. . They lack the functionalities I want. Acrobat professional , and Nitro pdf has the functionalities but they are not free. Scribus,

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com1tag:blogger.com,1999:blog-6102384358552884453.post-20740956080255239412009-05-24T17:44:00.002+05:302009-10-17T14:58:51.895+05:30

fortune is a utility for displaying random text items from a database. The data files for fortune is kept in the directory /usr/share/games/fortune by default. We can add our own data files to it.Suppose you want to display a random quote of Einstein whenever you type fortune einstein , as shown below.hash@ssl51:~$ fortune einstein"The eternal mystery of the world is its comprehensibility."For

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-5252152457338768522009-05-19T11:29:00.008+05:302009-10-17T14:58:51.896+05:30

Cowsay is a utility for printing text as dialogues (as a balloon) by cow.hash@ssl50:~$ cowsay "Carry on"__________&lt Carry on&gt----------\ ^__^\ (oo)\_______ (__)\ )\/\ ||----w | || ||A variety of 'cows' like skeleton, tux, devil, dragon, turtle, etc are available. For more available cows check the directory /usr/share/cowsay/cows.hash@ssl50:~$ cowsay -f tux "Carry on"__

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-57377005234163337532009-04-30T20:04:00.002+05:302009-04-30T20:09:31.678+05:30

Gnome-do is a powerful utility to deploy applications or directories. You can start applications, visit url, or browse through directories .. without moving your hands from keyboard to mouse. Install gnome-do. Strat it(u can assign a short cut key ). Just type the name of application, directory,url .. you want. Press Enter key. You will get what u want.

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-84644384607332451532009-04-30T20:00:00.003+05:302009-10-17T14:58:51.896+05:30

If you want to execute a series of commands with root privilege then it is cumbersome to type sudo before every command. Instead just type sudo -i This will take you to root login with required environment variables. You can continue your work there.hash@ssl50:~$ sudo -i[sudo] password for hash:root@ssl50:~#For more details check manpage for sudo.

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com1tag:blogger.com,1999:blog-6102384358552884453.post-42772544831127967532009-04-29T18:18:00.005+05:302009-10-17T14:58:51.897+05:30

pdftk (pdf toolkit) is a tool for manipulating pdf files. It can be used forconcatenating pdf filessplitting filesupdate files....It's very easy to use the tool. For example, to combine two pdf documents say part1.pdf and part2.pdf to get full.pdf just typepdftk part1.pdf part2.pdf cat output full.pdfFor more details visit http://www.accesspdf.com/pdftk/

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-22488208319969732322009-04-11T16:43:00.007+05:302009-10-17T14:58:51.897+05:30

zenity is a tool for displaying gtk+ dialogs from command line or shell scripts. It can be used for displaying various kind of dialog boxes.It is easy to use zenity for simpler applications compared to writing a GTK based program.Following are some of dialogs that can be created using zenity.Read text (entry)hash@ssl50:~$ name=`zenity --entry --title="Example" --text="Your name please"`

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-82017175728581292932009-04-05T21:20:00.004+05:302009-10-17T14:58:51.897+05:30

Gnome global keyboard short cuts can't be applied to Amarok, which is basically a KDE application. There is an amarok script available (Gnome Multimedia Keys in kde-apps.org ) for mapping those keys to the amarok short cuts. Extract the package and just run the python script. Whenever the script is running and amarok is ON the keys will work.For more details visit http://www.kde-apps.org/content/

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-64829862270701256022009-04-03T12:40:00.008+05:302009-10-17T14:58:51.898+05:30

I like Ubuntu and hence gnome very much. When I use it in my laptop a lot of visible area is occupied by different interfaces (like the tool bar,menu bar etc). I thought reducing the font size can give enough work space. Here are two methods I could find out for doing thatUsing gconf editorOpen gconf-editor (type the command gconf-editor). Install the package gconf-editor if it is not already

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-21475525978248176572009-04-01T13:39:00.002+05:302009-05-23T21:24:46.704+05:30

Now Gmail has introduced the facility to mail in Indian languages. This setting is made active by default in India. If it is not active just go to settings, language section, enable transliteration. You should have the necessary fonts in you machine.For typing in a language, just select the language in the compose page. Type as you speak in your language (transliteration).For more details visit

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com2tag:blogger.com,1999:blog-6102384358552884453.post-33648466531153590472009-03-28T14:07:00.007+05:302009-10-17T14:58:51.898+05:30

Basket is a note taking application for KDE. It is available for ubuntu also. It has a lot of features compared to other note taking applications.Following are some of of it.Add note at any location of the page.Grab screen shotsDrag note entriesTag each note entry (shortcuts are available for this)importanttodo listslinksidea,information,personalCollapse listsCreate links to files and

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-91608232079651155032009-03-25T20:33:00.007+05:302009-10-17T14:58:51.899+05:30

It is desirable to minimize applications to system tray rather than messing up the task bar. In Linux many applications has its own extension to get minimized to system tray.Browsers are application which is needed all the time. We would have at least some web pages opened in it if we are in a work. Opera has its extension to minimize to system tray, along with. For Firefox you have to add the

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com3tag:blogger.com,1999:blog-6102384358552884453.post-42909747706539695812009-03-22T10:29:00.004+05:302009-03-22T12:18:31.199+05:30

Proxy server is as an intermediate for a machine(client) to connect to another machine or network. All outside connections of the client can be done by the proxy server. Proxy server can be used for setting firewall in a network.Other than just forwarding requests from client, proxy servers can cache some data(web pages,DNS,network lookups) it has already retrieved. Such proxies are called

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-80692705556828399872009-03-19T23:10:00.003+05:302009-10-17T14:58:51.899+05:30

Samba is a free software implementation of network file sharing application protocol (SMB/CIFS) of windows. It allows sharing of files, parallel port devices, printers in a network.Some examples for using samba is given below.Add a shareEdit the file /etc/samba.smb and append the following (modify according to your requirements)[Programs]path = /home/hash/Programsvalid users = hashread only =

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-58418845537349185982009-03-13T22:17:00.004+05:302009-03-13T23:13:41.868+05:30

I don't have any mail clients configured. I used to get difficulties in sending mail by clicking mailto links. There is a solution in firefox 3 for gmail ( originally posted in lifehacker). Check it outOfficial Gmail Blog: Tip: Set Gmail as your default email client in Firefox 3.

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-53710107119602322832009-03-12T21:03:00.005+05:302009-10-17T14:58:51.899+05:30

lsb_release is a command which gives linux distribution related information of the current installation. For example the following command gives all description of the current installationguest@debian:~$ lsb_release -aNo LSB modules are available.Distributor ID: DebianDescription: Debian GNU/Linux 4.0r7 (etch)Release: 4.0r7Codename: etchFor more options check man lsb_release

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-58386410696521280442009-03-09T20:36:00.005+05:302009-03-09T20:48:31.649+05:30

Command line tools like wget,apt-get requires the variable http_proxy to be initialized , to access the internet if proxy only is available. The format is as followshttp_proxy=http://user:password@proxyhost:portnumber.For example $ http_proxy=http://hash:mypassword@192.168.40.1:3128Then execute the applications needed.

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-30999048580955980042009-03-06T17:26:00.005+05:302009-05-23T21:25:20.999+05:30

Do you like displaying random quotes(adage/epigram) on your terminal each time you open a terminal?fortune is a utility which print a random, hopefully interesting, adage each time the command is executed.hash@ssl50:~$ fortuneHe who opens a school door, closes a prison. -- Victor HugoTo get the output displayed each time you start a shell append the fortune command to end of the file .

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-6462565142614295462009-03-06T09:24:00.004+05:302009-03-06T09:46:39.263+05:30

In one of my earlier post, I mentioned how to set up an Ubuntu mirror and using it for installing Linux. There are many other ways to install Linux in more than one machine(as in the case of a lab).Suppose you have one machine which has all the softwares installed and other necessary settings. This installation can be cloned to another using cloning tools like g4u.g4u(Ghost for Unix) is a cloning

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-7369943294389210702009-03-04T13:05:00.006+05:302009-03-05T20:57:42.070+05:30

Other than the xserver which is currently you are using, there are other consoles where you can login and do your work simultaneously.Key combinationsCtrl+Alt+Fn(n starts from 1): For switching into virtual consolesCtrl+Alt+Fm(m starts from 7): For switching into different screens(If you have started many screens).Compared to windows we can have more than one screen in linux (Don't confuse it

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com1tag:blogger.com,1999:blog-6102384358552884453.post-79169783823284902212009-03-01T22:18:00.007+05:302009-03-05T20:57:20.403+05:30

I wanted to install Ubuntu in more than one pc. Installing using CD in each machine is time consuming. Net installation is another option. I decided to boot from a CD and obtain install image and packages from another machine(let me call it 'server'). Server machine should should have an Ubuntu mirror. Preparing an ubuntu mirror using apt-mirror needes downloading a lot of packages from other

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-70735930616177220102009-02-27T18:32:00.007+05:302009-10-17T14:53:07.843+05:30

Java has a for loop, but it didn't have a for each functionality. From jdk5.0 onwards they have added for each functionality in Java.public class Example{public static void main(String args[]) throws Exception { int[] values = { 2,4,6,8,10,12,14,16,18,20 }; for( int i : values) { System.out.println(i); }}}Given an array, a loop variable can select each element of the array in

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-23489853178848046052009-02-21T11:02:00.006+05:302009-10-17T14:58:51.900+05:30

A partition can be formatted to different file systems. For a pen drive FAT partition is adopted universally. Linux partition is commonly ext3/ext2/ext4/reiserfs.. . Windows usually work with FAT or NTFS partitions.For formatting a partition as FAT ( as in the case of a pen drive ), give the commandmkfs.vfat /dev/sdb1 where /dev/sdb1 corresponds to the required partition. To get partition number

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-75369201496209170442009-02-11T18:12:00.009+05:302009-10-17T14:47:55.654+05:30

fdisk is used for partitioning disks. It can be used for creating , deleting partitions , change fs type, labelling etc. It can be executed only as a privileged user. Simply type fdisk followed by the device file name as shown$ fdisk /dev/sdaThe number of cylinders for this disk is set to 30394.There is nothing wrong with that, but this is larger than 1024,and could in certain setups cause

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-30263263958960415372009-02-06T16:48:00.001+05:302009-10-17T14:47:55.655+05:30

GRUB( GRand Unified Boot loader) can be installed in many waysfrom current linux installationfrom live cd Installing GRUB from current linux.Type the command # grub-install /dev/sda where sda corresponds to the harddisk where the boot loader is being installed. The boot loader is in a small portion and hence it keeps all other necessary files in another location. By default the boot loader takes

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com1tag:blogger.com,1999:blog-6102384358552884453.post-15378268630609472802009-02-03T22:06:00.002+05:302009-10-17T14:47:55.655+05:30

Stardict is both an online and offline dictionary for linux ( it is available for windows too).Some of the features which I likedDifferent dictionaries like OALD(Oxford Advanced Learners Dictionary), Orient Longman, Meriam Webster , Britannica and a lot more can be added to it. They are freely downloadable from its site.Word can be specified as a regular expression which gives a list of available

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-54696945959042019362009-01-20T13:15:00.001+05:302009-10-17T14:47:55.656+05:30

Use the command xrandr to list all possible resolutions available.For eg;hanoosh@hash>xrandrScreen 0: minimum 320 x 200, current 1280 x 1024, maximum 1280 x 1280VGA connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm 1280x1024 60.0*+ 75.0 59.9 1152x864 74.8 1024x768 75.1 60.0 800x600 75.0 60.3 640x480 75.0 60.0 720x400

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-62565909116868799962009-01-10T22:17:00.001+05:302009-10-17T14:47:55.656+05:30

Outline TATA indicom wireless modem is a dial up connection. The utility wvdial is used to connect to internet. The tool require several parameters (username , password, modem type, phone number ..) to be specified. The parameters required can be kept in a config file and wvdial can be called specifying that file. The file can be created manually or using other tools.The steps are explained

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-46732064203361865082008-09-11T23:36:00.001+05:302009-02-23T18:47:23.010+05:30

Boot loader is the one who loads OS into memory and handing over the execution to it.Boot loader can give option to boot into different OSes(one at a time).There are many boot loaders available. GRUB(Grand Unified Boot loader) is more popular in Linux world. In windows we have ntldr...

mohamed hanooshhttp://www.blogger.com/profile/11613427582893503618noreply@blogger.com0tag:blogger.com,1999:blog-6102384358552884453.post-39658254201883813182008-08-16T23:00:00.000+05:302009-01-20T21:32:30.008+05:30

Vim is an editor. For those who are trying it first time feel that it very crude . Those who have been using tell that this is the best editor. I also find it very good than any other editor. One of the main advantage of this editor , i think , is that without taking our hand from the letters side we can do all sort of work. We don't have to even touch the mouse.Other features which I find

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