Saturday, September 10, 2016

How to install Oracle Java 8 on Ubuntu

  1. Open terminal
  2. Type
    sudo apt-get update

    sudo apt-get install default-jre sudo apt-get install default-jdk

    sudo add-apt-repository ppa:webupd8team/java
    sudo apt-get update

    sudo apt-get install oracle-java8-installer

    sudo update-alternatives --config java

  3. Choose the java installation number that you want to use as a default
  4. Copy the path
  5. Type
    sudo gedit /etc/environment

  6. At the end of the file, add the following line:
    JAVA_HOME={DEFAULT JAVA PATH}
    {DEFAULT JAVA PATH} is the java installation number that you selected on step 3

  7. Save the file
  8. Close the editor
  9. Type
    source /etc/environment

Example:

I want to use the Oracle Java 8 as default and set the JAVA_HOME to it:
  1. Open terminal
  2. Type
    sudo apt-get update

    sudo apt-get install default-jre sudo apt-get install default-jdk

    sudo add-apt-repository ppa:webupd8team/java
    sudo apt-get update

    sudo apt-get install oracle-java8-installer

    sudo update-alternatives --config java

  3. Ubuntu will return to a content similar like the below:
    There are 2 choices for the alternative java (providing /usr/bin/java).

      Selection    Path                                            Priority   Status
    ------------------------------------------------------------
    * 0            /usr/lib/jvm/java-8-oracle/jre/bin/java          1082      auto mode
      1            /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java   1081      manual mode
      2            /usr/lib/jvm/java-8-oracle/jre/bin/java          1082      manual mode

    Press <enter> to keep the current choice[*], or type selection number: 

  4. Type 0
  5. Copy the path of the selection 0 until java-8-oracle ( /usr/lib/jvm/java-8-oracle)
  6. Type
    sudo gedit /etc/environment

  7. At the end of the file, add the following line:
    JAVA_HOME=" /usr/lib/jvm/java-8-oracle"

  8. Save the file
  9. Close the editor
  10. Type
    source /etc/environment

Source: https://www.digitalocean.com/community/tutorials/how-to-install-java-with-apt-get-on-ubuntu-16-04

How to install Apache, MySQL and PHP in Ubuntu

  1. Open terminal
  2. Type

    sudo apt-get update
    sudo apt-get install apache2

    sudo apt-get install mysql-server

    sudo apt-get install php libapache2-mod-php php-mcrypt php-mysql

    sudo systemctl restart apache2
Source: https://www.digitalocean.com/community/tutorials/how-to-install-linux-apache-mysql-php-lamp-stack-on-ubuntu-16-04

How to enable root login in Linux

  1. Open terminal
  2. Type

    sudo passwd root

Tuesday, September 6, 2016

How to restore MySQL dump/backup?

  1. Open the Command Prompt (Windows)/Terminal (Linux)
  2. Go to the folder where it is the MySQL dump/backup file
  3. Type the following command:

    mysql -u {username} -p{password} -h{host} {databaseName} < {backup-name}.sql
{username} is the login that has access to connect to the database
{password} is the login's password
{host} is the server name where it is the database
{databaseName} is the database name
{backup-name} is the name back up file name

Example:

I want to restore the Meemaw.sql dump/backup file to the BAZINGA database located at the TheBigBangTheory host with the user name Sheldon and password Cooper.

mysql -u Sheldon -pCooper -h TheBigBangTheory BAZINGA < Meemaw.sql

Source: http://www.thegeekstuff.com/2008/09/backup-and-restore-mysql-database-using-mysqldump/

Thursday, September 1, 2016

How to download a site with wget


  1. Open terminal or command prompt
  2. Type

    wget --mirror --convert-links --adjust-extension --page-requisites --no-parent {url}
{url} is the url of the site that you wants do download

Example

I want to download the Luiz's Blog
wget --mirror --convert-links --adjust-extension --page-requisites --no-parent http://www.blogger.com