Angular with Electron JS

•Installation

•Angular: npm install -g @angular/cli

•Electron: npm i -D electron@latest

•Electron Packager:  npm install electron-packager -g

What you need to change ?

•Create new angular app : ng new appdemo

•Create main.js

•Update package.json

•Update index.html

Command to test electron app: npm run electron-build

Command to create executable: 

      electron-packager . --platform=<platform-name>

e.g.  electron-packager . --platform=win32

Github git clone url:

git clone https://github.com/yogeshjog/Angular-Electron.git

Video Demo:

Installing Node server (Node JS) on Ubuntu

Just hit the following commands:

$sudo apt-get install curl

$curl -sL https://deb.nodesource.com/setup_10.x | sudo -E bash -

$sudo apt-get install -y nodejs

source :https://nodejs.org/en/download/package-manager/#debian-and-ubuntu-based-linux-distributions-enterprise-linux-fedora-and-snap-packages

(: I don't get it why node js posted it so deep on the first place :)

Airtel customer care contact number direct

In order to contact airtel customer care

1. Dial 121/198 and wait for response
2. Select option 1 as Mobile Services
3. Select option 9 to speak to airtel customer care executive

Five Networks Login IP

Login IP for Five (5) Network is mentioned below:

http://10.20.30.25:8002/

The VirtualBox Linux kernel driver (vboxdrv) is either not loaded

ERROR:

"The VirtualBox Linux kernel driver (vboxdrv) is either not loaded 

or there is a permission problem with /dev/vboxdrv. 

Please reinstall the kernel module by executing"

sudo modprobe vboxdrv

if  does not worked then

sudo apt update
sudo apt install --reinstall linux-headers-$(uname -r) virtualbox-dkms dkms

reboot and run

sudo modprobe vboxdrv

SRC: https://askubuntu.com/questions/920689/how-to-fix-modprobe-vboxdrv-error-in-virtualbox

Ubuntu Stuck on Blue Screen Error

ISSUE: Ubuntu Stuck on Blue Screen While Booting

Solution:

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

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.

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:

1. Grab a web installer as Microsoft suggest and install whatever the components you need and double click on it.
2. 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 :)

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

RMI basic arithmetic

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

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

1. Copy the downloaded file and paste it in  directory.
2. Unzip using the command:

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

3. Install required packages using the command:

   sudo apt-get install alien libaio1 unixodbc

4. Enter into the Disk1 folder using :

   cd Disk1/

5. 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

6. 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

7. Change the permission of the  file using the command:

   sudo chmod 755 /sbin/chkconfig  

8. 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

9. 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 

10. Verify the change using the command:

    sudo cat /etc/sysctl.d/60-oracle.conf 

11. You should see what you entered earlier. Now load the kernel parameters:

    sudo service procps start

12. Verify the new parameters are loaded using:

    sudo sysctl -q fs.file-max

    You should see the file-max value that you entered earlier.
13. Set up /dev/ mount point for Oracle. Create the following file using the command:

    sudo gedit /etc/rc2.d/S01shm_load

14. 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 

15. Change the permissions of the file using the command:

    sudo chmod 755 /etc/rc2.d/S01shm_load

16. 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

1. Install the  DBMS using the command:

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

2. Configure Oracle using the command:

   sudo /etc/init.d/oracle-xe configure 

3. Setup environment variables by  your .bashrc file:

   gedit ~/.bashrc

4. 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

5. Load the changes by executing your profile:
    777 ~/.profile

   . ~/.profile

6. Start the Oracle 11gR2 XE:

   sudo service oracle-xe start

7. Add user YOURUSERNAME to group dba using the command:

   sudo usermod -a -G dba YOURUSERNAME

Step 4: Using the Oracle XE Command Shell

1. Start the Oracle XE 11gR2 server using the command:

   sudo service oracle-xe start

2. 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.
3. 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;

4. 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.
5. Exit the  admin shell using the SQL command:

   exit;

6. 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