F1: 2017

Wednesday, December 6, 2017

Ubuntu Stuck on Blue Screen Error

ISSUE: Ubuntu Stuck on Blue Screen While Booting

Solution:

Press ctrl + alt + F1
run command "sudo apt-get upgrade"
sudo dpkg --configure -a

Saturday, December 2, 2017

IO Error: The network adapter could not establish the connection

I'm not sure if the following steps will help you or not to solve the "IO Error: The network adapter could not establish the connection" issue just give a try it works in my case.

The error was:

(In NetBeans and in Sqldeveloper)

Steps:

Step 1: Open CMD
Step 2: Type services.msc and hit enter

Step 3: Search for Oracle Services and make sure that the following three are running:
OracleXETNSListener
OracleXEClrAgent
OracleServiceXE

Step 4: If not then just right click and hit start

That's all :).

Hope This will help you :p.

Thursday, November 2, 2017

Visual Studio 2017 Offline Installation

1) You will never get an ".iso" file officially from Microsoft for Visual Studio 2017 (Any edition).

2) Thus you remains with 2 options:

Grab a web installer as Microsoft suggest and install whatever the components you need and double click on it.
Follow the following steps to create an offline installer setup so that whenever you format you don't have to download it again or you can install it to another pc without an internet connection.

I downloaded Visual studio 2017 Community edition from here but this procedure will work for other editions too. It took me near about 13 hours and download size was ( 30.5 GB )

<<Download link for VS Community 2017 edition >> Link working as of 03-11-2017.

Steps to create offline installer of VS2017:

Download visual studio setup exe file from the above link.
Open Command Prompt
Move to your downloaded directory where the exe file is
And use the following command

vs_community_something.something.exe

This is name of your downloaded file

In my case it is -> vs_community__1972895516.1509628450.exe

It differs per download so don't worry about matching the exact digits :p

--layout dir_path

where dir_path is a location where your offline installer will present. By default, all languages will be downloaded. For me I only want english US for that

--lang en-US

you can use any language.

ISO CODE	LANGUAGE
cs-CZ	Czech
de-DE	German
en-US	English
es-ES	Spanish
fr-FR	French
it-IT	Italian
ja-JP	Japanese
ko-KR	Korean
pl-PL	Polish
pt-BR	Portuguese - Brazil
ru-RU	Russian
tr-TR	Turkish
zh-CN	Chinese - Simplified
zh-TW	Chinese - Traditional

Full command format:

vs_community setup.exe --layout "dir_path" --lang ISO-CODE

In my case it is:

vs_community__1972895516.1509628450.exe --layout "D:\VS\" --lang en-US

once you type the command and hit enter it will open Visual Studio command prompt and starts downloading.

Once the Downloading is done it will show you the following message in command prompt

Setup completed successfully.
Press any key to continue...

REMEMBER IT DOESN'T HAVE ANY PAUSE or RESUME OPTION SO YOU HAVE TO DOWNLOAD IT COMPLETELY.

ALL THE BEST AND TELL ME TIME TAKEN AND SPEED YOU GET AND TOTAL DOWNLOAD SIZE :)

Tuesday, September 19, 2017

Code::blocks ppa

To install Code::Blocks from this PPA, open a terminal and type:

sudo add-apt-repository ppa:damien-moore/codeblocks-stable
sudo apt-get update
sudo apt-get install codeblocks codeblocks-contrib

Wednesday, August 2, 2017

RMI Program for arithmetic operations:
_________________________________________________________________________________

Interaface

package RMIDemo;

import java.rmi.Remote;
import java.rmi.RemoteException;

/**
*
* @author yogesh
*/
public interface one extends Remote{
public int add(int num1,int num2)throws RemoteException;
public int sub(int num1,int num2)throws RemoteException;
public int mul(int num1,int num2)throws RemoteException;
public int div(int num1,int num2)throws RemoteException;

}

_________________________________________________________________________________

Implementation Class

package RMIDemo;

import java.rmi.RemoteException;

import java.rmi.server.UnicastRemoteObject;

/**

* @author yogesh

public class two extends UnicastRemoteObject implements one{

public two()throws RemoteException{}

@Override

public int add(int num1, int num2) throws RemoteException {

System.out.println("Addition Performed");

return ((num1+num2));

}

@Override

public int sub(int num1, int num2) throws RemoteException {

System.out.println("Subtraction Performed");

return ((num1-num2));

}

@Override

public int mul(int num1, int num2) throws RemoteException {

System.out.println("Multiplication Performed");

return ((num1*num2));

}

@Override

public int div(int num1, int num2) throws RemoteException {

System.out.println("Division Performed");

return ((num1/num2));

}

_________________________________________________________________________________

Server Class

package RMIDemo;

import java.io.IOException;

import java.net.MalformedURLException;

import java.rmi.AlreadyBoundException;

import java.rmi.Naming;

import java.rmi.RemoteException;

import java.rmi.registry.Registry;

/**

* @author yogesh

public class rmiserver {

public static void main(String[] args) throws RemoteException, AlreadyBoundException, MalformedURLException, IOException {

Registry r = java.rmi.registry.LocateRegistry.createRegistry(1099);//1099 is the port number

Runtime.getRuntime().exec("cmd /c C:\\Program Files\\Java\\jdk1.8.0_144\\bin\\rmic C:\\Users\\Yogesh\\Documents\\NetBeansProjects\\DSLabs\\build\\classes\\RMIDemo.two");

two twox=new two();

Naming.bind("add", twox);

Naming.bind("sub", twox);

Naming.bind("mul", twox);

Naming.bind("div", twox);

System.out.println("ALL OBJECTS CREATED");

System.out.print("\nListing");

String s[]=Naming.list("two");

for(String str:s){

System.out.println(""+str);

}

_________________________________________________________________________________

Client Class

package RMIDemo;

import java.net.MalformedURLException;

import java.rmi.Naming;

import java.rmi.NotBoundException;

import java.rmi.RemoteException;

import java.util.Scanner;

/**

* @author yogesh

public class rmiclient {

public static void main(String[] args) throws NotBoundException, MalformedURLException, RemoteException {

Scanner sc=new Scanner(System.in);

System.out.print("\nEnter two Numbers:");

int num1=sc.nextInt();

int num2=sc.nextInt();

one onex=(one)Naming.lookup("rmi://localhost/add");

one oney=(one)Naming.lookup("rmi://localhost/add");

one onez=(one)Naming.lookup("rmi://localhost/add");

one onew=(one)Naming.lookup("rmi://localhost/add");

System.out.println("Addition="+onex.add(num1,num2));

System.out.println("Subtraction="+oney.sub(num1,num2));

System.out.println("Multiplication="+onez.mul(num1,num2));

System.out.println("Division="+onew.div(num1,num2));

}

_________________________________________________________________________________

EXECUTING DEMO IN NETBEANS

Sunday, May 28, 2017

Installing .rpm on Ubuntu

Step 1: Installing alien

$sudo apt-get install alien dpkg-dev debhelper build-essential

Step 2:Converting .rpm to .deb

$sudo alien package_name.rpm

Step 3: Installing converted .deb

$sudo dpkg -i package_name.deb

Installing VLC on Fedora 22 or later

    $> su -
    #> dnf install https://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-$(rpm -E %fedora).noarch.rpm
    #> dnf install vlc
    #> dnf install python-vlc npapi-vlc

Installing Oracle 11g Express Edition on Ubuntu

Step 1: Download Oracle Database Express Edition.

Step 2: Instructions before install Oracle

Copy the downloaded file and paste it in directory.

Unzip using the command:

unzip oracle-xe-11.2.0-1.0.x86_64.rpm.zip

Install required packages using the command:
```
sudo apt-get install alien libaio1 unixodbc
```
Enter into the Disk1 folder using :
```
cd Disk1/
```
Convert RPM package format to DEB package format (that is used by Ubuntu) using the command:
```
sudo alien --scripts -d oracle-xe-11.2.0-1.0.x86_64.rpm
```

Create the required script using the command:

sudo gedit /sbin/chkconfig

The text editor is started and the commands are shown at the bottom of the screen. Now copy and paste the following into the file and save:

#!/bin/bash
# Oracle 11gR2 XE installer chkconfig hack for Ubuntu
file=/etc/init.d/oracle-xe
if [[ ! `tail -n1 $file | grep INIT` ]]; then
    echo >> $file
    echo '### BEGIN INIT INFO' >> $file
    echo '# Provides: OracleXE' >> $file
    echo '# Required-Start: $remote_fs $syslog' >> $file
    echo '# Required-Stop: $remote_fs $syslog' >> $file
    echo '# Default-Start: 2 3 4 5' >> $file
    echo '# Default-Stop: 0 1 6' >> $file
    echo '# Short-Description: Oracle 11g Express Edition' >> $file
    echo '### END INIT INFO' >> $file
fi
update-rc.d oracle-xe defaults 80 01

Change the permission of the file using the command:
```
sudo chmod 755 /sbin/chkconfig  
```
Set kernel parameters. Oracle 11gR2 XE requires additional kernel parameters which you need to set using the command:
```
sudo gedit /etc/sysctl.d/60-oracle.conf
```

Copy the following into the file and save:

# Oracle 11g XE kernel parameters 
fs.file-max=6815744  
net.ipv4.ip_local_port_range=9000 65000  
kernel.sem=250 32000 100 128 
kernel.shmmax=536870912

Verify the change using the command:
```
sudo cat /etc/sysctl.d/60-oracle.conf 
```
You should see what you entered earlier. Now load the kernel parameters:
```
sudo service procps start
```
Verify the new parameters are loaded using:
```
sudo sysctl -q fs.file-max
```
You should see the file-max value that you entered earlier.
Set up /dev/ mount point for Oracle. Create the following file using the command:
```
sudo gedit /etc/rc2.d/S01shm_load
```

Copy the following into the file and save.

#!/bin/sh
case "$1" in
start)
    mkdir /var/lock/subsys 2>/dev/null
    touch /var/lock/subsys/listener
    rm /dev/shm 2>/dev/null
    mkdir /dev/shm 2>/dev/null
*)
    echo error
    exit 1
    ;;

esac

Change the permissions of the file using the command:
```
sudo chmod 755 /etc/rc2.d/S01shm_load
```

Now execute the following commands:

sudo ln -s /usr/bin/awk /bin/awk 
sudo mkdir /var/lock/subsys 
sudo touch /var/lock/subsys/listener

Now, Reboot Your System

Step 3: Install Oracle

Install the DBMS using the command:

sudo dpkg --install oracle-xe_11.2.0-2_amd64.deb

Configure Oracle using the command:
```
sudo /etc/init.d/oracle-xe configure 
```
Setup environment variables by your .bashrc file:
```
gedit ~/.bashrc
```

Add the following lines to the end of the file:

export ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe
export ORACLE_SID=XE
export NLS_LANG=`$ORACLE_HOME/bin/nls_lang.sh`
export ORACLE_BASE=/u01/app/oracle
export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH
export PATH=$ORACLE_HOME/bin:$PATH

Load the changes by executing your profile:
777 ~/.profile
```
. ~/.profile
```
Start the Oracle 11gR2 XE:
```
sudo service oracle-xe start
```
Add user YOURUSERNAME to group dba using the command:
```
sudo usermod -a -G dba YOURUSERNAME
```

Step 4: Using the Oracle XE Command Shell

Start the Oracle XE 11gR2 server using the command:
```
sudo service oracle-xe start
```
Start command line shell as the system admin using the command:
```
sqlplus sys as sysdba
```
Enter the password that you gave while configuring Oracle earlier. You will now be placed in a SQL environment that only understands SQL commands.
Create a regular user account in Oracle using the SQL command:
```
create user USERNAME identified by PASSWORD;
```
Replace USERNAME and PASSWORD with the username and password of your choice. Please remember this username and password. If you had executing the above with a message about , then execute the following SQL command and try again:
```
alter database open resetlogs;
```
Grant privileges to the user account using the SQL command:
```
grant connect, resource to USERNAME;
```
Replace USERNAME and PASSWORD with the username and password of your choice. Please remember this username and password.
Exit the admin shell using the SQL command:
```
exit;
```
Start the shell as a regular user using the command:
```
sqlplus
```
Now, you can run commands...

Installing Google Chrome .rpm package in Fedora




Step 1: Install Following Dependencies:
$sudo yum install lsb
$sudo yum install libXScrnSaver




Step 2: download .rpm chrome package here or from https://www.google.com/chrome/.

Step 3: install .rpm chrome package using following command

$ sudo rpm -ivh google-chrome-stable_current_x86_64.rpm