How to setup a Solr Search Engine, run indexing and writing queries

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Configure JAVA Servlet or JSP webserver in linux (Fedora), which can be accessed over Internet

This blog is for those who want to test or release a private java webserver (weblogic, websphere, Glass-fish, Tomcat...) over internet.

*if you have already used any linux distribution, it will easy to configure otherwise you have to learn some basics of Linux (file-system, terminal/console, root account, console editors 'vi')



Follow these easy steps:-

1). Download Fedora iso file from get.fedoraproject.org/ 

2). Install fedora as any other linux(make user account and password)

4). Create root account 'How to make root account in linux'

5). Disable SELinux:-
            a). open terminal and switch user to root account   
                 $su
            b). edit /etc/selinux/config file via 'vi' editor
                  $vi /etc/selinux/config
            c). disable SELinux
                 SELINUX=disabled

           file /etc/selinux/config:          

6). Now OS is able to make server over internet
      if you want to run webservers like websphere or weblogic, you have to download and install linux compatible installation file, then configure and run from root account. It will bit complex for beginners.
      But beginners can try an easy and effective way- Install NETBEANS of J2EE version.

steps-
a). download and install jdk for linux from oracle website or Install jdk from software center of fedora

b). Download NETBEANS-J2EE version 
     click here to download

c). Install NETBEANS with Glass-fish or Tomcat web-servers
     $sudo '/path of netbeans-7.2.1-ml-javaee-linux.sh'
   (*Installation may require JVM path in terminal) 

d). Connect your PC to Internet and note down IP of PC(to get IP, use 'ipconfig' command in terminal)

e). Now open NETBEANS via root account
     (open terminal > $sudo '/path of netbeans .sh file')

f ).  you can import and run your complete project in NETBEANS
      Browser address will seem as- http://localhost:80/project_name/index.html

      replace localhost:80 to xxx.xxx.xxx.xxx your PC IP
      
Now you can access your website though http://xxx.xxx.xxx.xxx/project_name/index.html from internet connected computer or mobile.
This time your computer is working as webserver-host.

*Remember if you are using college or organization internet which has some Intranet architecture, your server will not work over internet. It will work only in Intranet(only in organization) because for hosting a webserver, host IP should be unique in internet but organization distributes only Intranet IP(Standard IP over Internet remain same for all computers in the organization). So if you want to test it over internet, you have to use dongle or broadband connection.

  Please write if have any problem or question in any step
 and if it is helpful and working.. please like/+1 the post.

Thank you ...

Crack Winows XP/ VISTA/ W-7 password through live cd or flash drive/pendrive

Ophcrack is freeware software, which can crack windows XP/VISTA/W7.

What is ophcrack?
Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms.

Features:
    » Runs on Windows, Linux/Unix, Mac OS X, ...
    » Cracks LM and NTLM hashes.
    » Free tables available for Windows XP and Vista/7.
    » Brute-force module for simple passwords.
    » Audit mode and CSV export.
    » Real-time graphs to analyze the passwords.
    » LiveCD available to simplify the cracking.
    » Dumps and loads hashes from encrypted SAM recovered from a Windows partition.
    » Free and open source software (GPL).

Download:                     1). Installation version                 2). Live CD/Flash drive version
 It may help you to get back forgotten password

How to Install exe files in linux and its limitations

Linux doesn't support direct compatibility with exe files but 'WINE' provides limited compatibility to work as middle-ware.

How to install :-
Open 'Software Download Center' and search 'WINE' and install it.
WINE makes a virual file system of MS WINDOWS in Linux.

How to use WINE :-
Open exe files in wine. It will give you same installation windows as MS WINDOWS.
after installation, it will create link in start automatically.

Limitations of WINE :-
1). WINE doesn't get access of network(internet). So installation of download manager, chat software, antivirus, web-browser, server games are worthless.
2). Linux doesn't provides enough graphic memory to WINE. So Games Installation is also worthless.

So What For Wine ??????
1). Microsoft Office
2). Your favorite Dictionary
3). Photo editor
and more.... hit and try

How to Install Linux in pendrive or flash drive via VM VirtualBox or VMWARE (even in 8 GB capacity pendrive)

This article for those who want a personal and portable OS in his/her pocket and for those too who want to run PC without HDD.
(*I have tested it for Ubuntu 12.10 and I think it will work for all edition and Linux production.)
Procedure-

1). Download VM VirtualBox of any version(I am using VirtualBox-4.2.4-81684 for windows) from oracle website as per running OS(linux or windows x86/x64)

2). Install VirtualBox

 

3). Run VMWARE and choose NEW
     Fill Name, Type and Version as per desired OS (I am planning for UBUNTU)

4). Choose memory size

5). Then in the page of hard drive selection..  Select first option (don't add any hard drive)
     because you are going to use pendrive

6). Now a virtual machine is created 

7). Then go to Setting --> Storage --> Controller: IDE --> empty --> Choose a virtual  CD/DVD file (iso image file of OS)

8). Linux iso image added

9). Go to Setting --> USB --> Add pendrive

10). Start virtual machine

 11). Select " Install Ubuntu" then continue

12). Select Installation type "Something else"

13). Now this is the partition page (if pendrive don't support partition then install it as NTFS via windows)

              partition procedure:-
                            1. Select "New Partition"
                                      Use as:- Ext2 file system
                                      Mount point:-  /
                                     Size: atleast 5 GB
                            2. Select "New Partition"
                                      Use as:- Ext2 file system
                                      Mount point:-  /home
                                     Size: all remaining space

*Do not forget to set "Device for boot loader installation" as pendrive device

14). Now click on "Install Now"
       It will start the installation then fill user account details and paassword

15). After completion of installation of linux, pendrive is ready to use as portable OS

Please write if have any problem to execute these steps and also write review if it is helpful

How to set permanent Variable PATH in Linux

a). Through Command Line

Open Terminal and write this command

$ sudo vi /etc/profile

and append PATH export command

Ex. 1). To set JAVA_HOME/PATH for JDK append these two lines and save

export JAVA_HOME=/usr/java/jdk1.6.0_30

export PATH=$PATH:$JAVA_HOME/bin

2). To set JDK PATH only

export PATH=$PATH:/usr/java/jdk1.6.0_30/bin

b) Through GUI

Login as root account(if root account is not active read this blog to activate http://nvnsolution.blogspot.in/2012/02/how-to-make-root-account-in-ubuntu-to.html )

open via text editor /etc/profile file and append PATH export command and save

Ex. to set JAVA_HOME path

 

How to make root account in ubuntu/Linux to get admin access without sudo

Open terminal and Write
$sudo passwd root
now enter sudo account password which you set initially
then Enter New UNIX(root) password and reEnter UNIX(root) Password
Now you can login as root account--
select "logout"/"switch user" then login as
USERNAME- root
Password- UNIX (root) password as u entered
And to change user in terminal write--
$su
now enter UNIX(root) password
now you have logged as root account...
if have any problem to execute plz write...