How to install Tomcat7

[this process was accomplished using Ubuntu 12.04 LTS, Tomcat 7 and Eclipse Standard Keplerr 4.3]

Follow this tutorial (from step 1 to 9):
http://gridlab.dimes.unical.it/lackovic/eclipse-tomcat-ubuntu-jersey/

Notes for the above tutorial:
Download and install eclipse manually, from:
http://www.eclipse.org/downloads/packages/eclipse-standard-43/keplerr

Before starting up the tomcat7 server:
sudo mkdir /usr/share/tomcat7/logs

Before shutting down the tomcat7 server:
sudo mkdir /usr/share/tomcat7/conf
sudo cp /etc/tomcat7/server.xml to /usr/share/tomcat7/conf

Before creating a "Dynamic Web Project", run:
cd /usr/share/tomcat7
sudo ln -s /var/lib/tomcat7/conf conf
sudo ln -s /etc/tomcat7/policy.d/03catalina.policy conf/catalina.policy
sudo chmod -R 777 /usr/share/tomcat7/conf

If you try to add the Tomcat Server v7.0, and the server name doesn't appear:
Close Eclipse
cd ~/workspace/.metadata/.plugins/org.eclipse.core.runtime/.settings/   
rm org.eclipse.jst.server.tomcat.core.prefs   
rm org.eclipse.wst.server.core.prefs
Restart Eclipse


Then, to configure a servlet, follow this tutorial:
http://www.srccodes.com/p/article/3/Tomcat-Hello-World-Servlet-using-Eclipse-IDE

How to burn / create a dvd video on Ubuntu

[this process was accomplished using Ubuntu 12.04 LTS]

I just used a program, called "Devede". To install:
sudo apt-get install devede

How to install IntelliJ IDEA

[This process was accomplished using Ubuntu 12.04 LTS and IntelliJ IDEA 13]

Install Java:
http://lucastipss.blogspot.com.br/2013/11/how-to-installupdate-java.html

Download Android SDK:
https://developer.android.com/sdk/index.html

To download the Target devices:
"run tools/android, under android_sdk_YOUR_OS, to retrieve the targets, check the option that says “force https to be fetched using http” under settings. And finally, under “Available packages,” select the version of Android you want. ", author.

Download IntelliJ community edition:
http://www.jetbrains.com/idea/download/

Then, extract the folder where you want to be the path to the installation.

Apply the rights to run the executable:
sudo chmod +x [path to the installation]/bin/idea.sh

Do this process to increase the limit
http://confluence.jetbrains.com/display/IDEADEV/Inotify+Watches+Limit

Done!

To run the IDE, just run:
./[path to the installation]/bin/idea.sh

If you want, you can create an icon through the application Alacarte:
http://lucastipss.blogspot.com.br/2013/11/ubuntu-how-to-add-application-to.html

SubVersion Tips

To checkout a repository (example):
svn co --username [seu_usuario] https://zurbb.codespaces.com/svn/buusapp/android/trunk android2.0
"seu_usuario" = username
"android2.0" = new folder to where the files will be downloaded

Java Default SDK Folder

[this process was accomplished using Ubuntu 12.04 LTS]

The default java jdk folder is:
/usr/local/java

How to install KeePass

On Ubuntu 16.04 I installed KeePassXC - snap from Software Center
Install snap
https://askubuntu.com/questions/873243/hello-cannot-locate-the-core-snap-no-such-file-or-directory
Install ChromeIPass (didnt manage to make it work)
https://chrome.google.com/webstore/detail/chromeipass/ompiailgknfdndiefoaoiligalphfdae


On Ubuntu 12.04, I don't remenber.
On Ubuntu 14.04, I found the Keepass program on Software Center

Installing keeFox plugin (for firefox)
sudo apt-add-repository ppa:dlech/keepass2-plugins
sudo apt-get update
sudo apt-get install xul-ext-keefox

Then, just reopen KeePass and Firefox

How to format ubuntu

Tips:
Do NOT use internet during the installation. Update everything later.

My last configurations (during the ubuntu installation):
order - description - size - file system - Mount point
1 - main linux system - 70GB - ext4 - / (root)
2 - other win/linux system - 70GB - don't use the partition -
3 - swap - 10 GB - swap -
4 - efi (this is for the partion table index, or something like) - 1GB - efi -
5 - home - the rest - ext4 - /home

After installing,
http://lucastipss.blogspot.com/2013/11/what-to-do-after-installing-ubuntu.html

How to install a video board (MY GPU nVidia GT 630M)

[this process was accomplished on Linux Ubuntu 12.04 LTS]


Just run on terminal:
sudo apt-add-repository ppa:ubuntu-x-swat/x-updates
sudo apt-get update
sudo apt-get install nvidia-current nvidia-settings

Note:
Some time later the installation, an icon on top bar appeared, asking to install additional driver "NVIDIA accelerated graphics driver (post-release updates) (version 319-updates)" DON'T INSTALL THIS!

This was a tutorial extracted from:
http://www.howopensource.com/2012/10/install-nvidia-geforce-driver-in-ubuntu-12-10-12-04-using-ppa/ 

FOR UBUNTU 14.04 LTS
Install the recommended driver from "additional driver" native support.
Don't forget to set this configurations, for power savings and lower the temperature: https://help.ubuntu.com/community/PowerManagement/ReducedPower


FOR UBUNTU 12.04 LTS
The process above didn't work pretty well. The unity was converted to a 2d old one.

Then, install bumblebee:

1. sudo add-apt-repository ppa:bumblebee/stable
2. Enable the Universe and Multiverse repositories (for bumblebee and nvidia packages respectively).
3. sudo apt-get update
4. Install Bumblebee using the default proprietary nvidia driver for 12.04 - 13.04 :
   sudo apt-get install bumblebee bumblebee-nvidia virtualgl linux-headers-generic
   • And for 13.10 :
   sudo apt-get install bumblebee bumblebee-nvidia primus linux-headers-generic
5. Reboot 

From:
https://wiki.ubuntu.com/Bumblebee

What to do after installing ubuntu

Change keyboard numpad key from comma to dot (at "keyboard layout options):
Do it customizing the "numeric keypad delete key behavior" from default to "four level key with dot". (On Ubuntu 13.10+, http://mikewilliamson.wordpress.com/2014/03/31/changing-keyboard-layout-options-in-ubuntu-14-04/)
Above step not necessary anyone, for ubuntu 14.04 lts.

Install terminator:
sudo apt-get install terminator

Update ctrl+alt+T shortcut:
Search for keyboard, go to tab shortcut. Then create a new shortcut (it will override the default).

Install the GPU:
http://lucastipss.blogspot.com.br/2013/11/how-to-install-my-gpu-nvidia-gt-630m.html

Make the power savings and low temperature configs:
https://help.ubuntu.com/community/PowerManagement/ReducedPower

Configure the two-finger scroll:
Search for "Mouse and Touchpad"

Install Pre load (to speed up the computer using memory pre loads):
sudo apt-get install preload

Install java
http://lucastipss.blogspot.com.br/2013/11/how-to-installupdate-java.html

Install KeePass
http://lucastipss.blogspot.com.br/2013/12/how-to-install-keepass.html

Customize firefox
http://lucastipss.blogspot.ch/2015/07/features-installed-on-firefox.html  

Ubuntu: How to prevent your computer from lock/suspend/hibernate?

[this process was accomplished using Ubuntu 12.04 LTS]

Install this program, called "Caffeine". It prevents the computer from locking/suspending/hibernating by simulating some key pressing events.

TO INSTALL:
On terminal:
sudo add-apt-repository ppa:caffeine-developers/ppa
sudo apt-get update
sudo apt-get install caffeine

Then just run and configure like you want.

Done!

How to install/update java

[this process was accomplished using ubuntu 12.04 lts]

[this tutorial is COPIED from www.wikihow.com/Upgrade-Oracle-Java-on-Ubuntu-Linux]

...

Java: Working with Date

The best tutorial I've found:
http://www.blog.edersonlima.net/?p=144

How to connect your galaxy (or android +4.0) for mass storage transfer?

[process accomplished on Ubuntu 12.04 LTS and Galaxy S2 with Android 4.0.3]

Just go to (with the USB cable disconnected):
Configurações > Conexões sem fios e redes > Utilitários USB

Click on "Conectar memória ao PC".

Then follow the instructions and voilá.

Done!

With it doesn't resolve the problem, I found other tutorials to try:
http://askubuntu.com/questions/87667/getting-mtp-enabled-devices-to-work-with-ubuntu/308366#308366

http://askubuntu.com/questions/247943/are-there-any-plans-to-improve-mtp-support-on-future-ubuntu-releases

About Eclipse

To automatically indent a code:
Select all the code > ctrl + i

To collapse all the capable blocks:
ctrl + alt + NUM_KEYPAD_DIVIDE

To expand all the collapsed blocks:
ctrl + alt + NUM_KEYPAD_MULTIPLAY

To display the line number:
Preferences > General > Editors > Text Editors
and check "Show line numbers"

To change the color scheme, use this tutorial:
http://eclipsecolorthemes.org/?view=plugin

Installing Android Studio

[process accomplished in Ubuntu 12.04 LTS]

To use Android Studio, simply extract the zipped files and execute the file bin/studio.sh

It will be asked for the java jdk.
http://lucastipss.blogspot.com.br/2013/12/java-default-sdk-folder.html

Done!

Android: How to install and import Library Support v7 to your project

[process accomplished using Ubuntu 12.04 LTS + Eclipse (from ADT Bundle)]

1. Make sure you have downloaded the Android Support Library using the SDK Manager.
2. Create a library project and ensure the required JAR files are included in the project's build path:
   1. Select File > Import.
   2. Select Existing Android Code Into Workspace and click Next. (without copying files)
   3. Browse to the SDK installation directory and then to the Support Library folder. For example, if you are adding the appcompat project, browse to <sdk>/extras/android/support/v7/appcompat/.
   4. Click Finish to import the project. For the v7 appcompat project, you should now see a new project titled android-support-v7-appcompat.
   5. In the new library project, expand the libs/ folder, right-click each .jar file and select Build Path > Add to Build Path. For example, when creating the the v7 appcompat project, add both the android-support-v4.jar and android-support-v7-appcompat.jar files to the build path. (don't import v4 now. It could be create incompatibilities if your project already imported it).
   6. Right-click the library project folder and select Build Path > Configure Build Path.
   7. In the Order and Export tab, check the .jar files you just added to the build path, so they are available to projects that depend on this library project. For example, the appcompat project requires you to export both the android-support-v4.jar and android-support-v7-appcompat.jar files.(don't check v4 now. It could be create incompatibilities if your project already did it).
   8. Uncheck Android Dependencies.
   9. Click OK to complete the changes.

You now have a library project for your selected Support Library that you can use with one or more application projects.
Add the library to your application project:

1. In the Project Explorer, right-click your project and select Properties.
2. In the category panel on the left side of the dialog, select Android.
3. In the Library pane, click the Add button.
4. Select the library project and click OK. For example, the appcompat project should be listed as android-support-v7-appcompat.
5. In the properties window, click OK.

A picture is worth a thousand words:

You can follow this link too:

http://developer.android.com/tools/support-library/setup.html#download

How to customize NetBeans?

[this process was accomplished on Netbeans 7.3.1]

You can download a theme on internet, at sites like this.

The last one I used was Icarus.

And before that, was sublime style.

To install, just go to tools > options and click on "Import", at the botton.

To alter the font size, tools > options > Fonts & Colors > Font, and choose your preference.

Ubuntu: How to add an application icon to the launcher?

[this process was accomplished using Ubuntu 12.04 LTS]

Install the program alacarte (it's currently name is "Main Menu"):

sudo apt-get install alacarte

Then, just open it and add a new item to the category you want.

Done!

You could also do this process adding a .desktop file manually. To do that, follow this link:

http://askubuntu.com/questions/224004/how-to-add-programs-to-the-launcher

How to install SDL?

[This process was accomplished using Ubuntu 12.04 LTS + NetBeans 7.3.1]

First, you need to install the sdl library. Just go through the terminal:
sudo aptitude install libsdl1.2-dev

For others OS, look at here:
http://lazyfoo.net/SDL_tutorials/lesson01/index.php


To set up on Netbeans:
On the project you want to use it, go to "Project Properties -> Build -> Linker -> Libraries -> Add Option -> Other option ", and enter:
-lSDL

More on:
http://forums.netbeans.org/topic41614.html
http://forums.netbeans.org/post-29474.html


For other IDEs, look at here:
http://lazyfoo.net/SDL_tutorials/lesson01/linux/index.php


To test if it worked, run the following code:
#include "SDL/SDL.h"
int main( int argc, char* args[] ) {
 SDL_Init( SDL_INIT_EVERYTHING ); //Start SDL
 SDL_Quit(); //Quit SDL
 return 0;
}  

Installing SDL Extensions:

to load images of various extensions
sudo aptitude install libsdl-image1.2-dev
 
to work with fonts
sudo aptitude install libsdl-ttf2.0-dev

to work with 16-bit sounds
sudo aptitude install libsdl-mixer1.2-dev

For other OS:
http://lazyfoo.net/SDL_tutorials/lesson03/index.php

Set up on Netbeans:
On the project you want to use it, go to "Project Properties -> Build -> Linker -> Libraries -> Add Option -> Other option ", and enter:
-lSDL_image 
-lSDL_ttf
-lSDL_mixer 

You need to add the header files to the project:

#include "SDL/SDL_image.h"
#include "SDL/SDL_ttf.h"
#include "SDL/SDL_mixer.h" 

Done! 

How to install the SBVBLib?

[this process was accomplished on Ubuntu 12.04 LTS using Netbeans IDE 7.3.1 C/C++]

Download the VBLib:
[link]

Extract it wherever you want.

Then, on your Eclipse IDE:
right click on your project > properties > Build > C++ Compiler > Include Directories.

Add the path to the library. Mine was:
../sbvblibs-h/include

Ok, we're finished!

Now you can include the lib to your project, like this:
#include "VBLib/VBLib.h"

And namespacing:
using namespace br::com::sbVB::VBLib;

More information about header only libraries:
http://stackoverflow.com/questions/14287817/how-do-you-add-libraries-to-eclipse-cdt-no-such-file-or-directory

How to install QT Digia?

[tested on Ubuntu 12.04 LTS. But should work for many other platforms]

The easiest way, witch I used, was to go through the online instalation:

http://qt.digia.com/Try-Qt-Now/

Download the online installer on the above link, and run it.

It has a dependency that I had to install too:
sudo apt-get install libgl1-mesa-dev

If you difficulties on executing .run file, see:
http://lucastipss.blogspot.com.br/2013/10/ubuntu-how-to-runexecute-run-files.html

Android Development: How to make a custom ListView item

Tutorial to make the view (without buttons and functions):

http://hmkcode.com/android-custom-listview-items-row/

Android Development: To change the titlebar background color

Notes:

    the color setted was light gray
    For <api 11, the attribute changed was windowTitleBackgroundStyle
    For >api 11, actionBarStyle


Add to the application tag, on AndroidManifest.xml:

android:theme="@style/ThemeSelector"

On values/styles.xml, it was added:

    <style name="ThemeSelector" parent="android:Theme.Light">
        <item name="android:windowTitleBackgroundStyle">@style/WindowTitleBackground</item>
    </style>

    <style name="WindowTitleBackground">   
        <item name="android:background">#E0E0E0</item>
    </style>

On values-v11/styles.xml, add:

    <style name="ThemeSelector" parent="android:Theme.Holo.Light">
        <item name="android:actionBarStyle">@style/ActionBar</item>
    </style>

    <style name="ActionBar" parent="android:style/Widget.Holo.ActionBar">   
        <item name="android:background">#E0E0E0</item>
    </style>

Git + GitHub Commands

touch README.md
git init
git add README.md
git commit -m "first commit"
git remote add origin [url
git push -u origin master

git clean -fd   # removes all unstaged files, recursivel
git reset --hard [HEAD hash] # To reset the files to a commit point:
git clone [url]


git status                                  #see what files have been modified
git add files.txt                            #add the file.txt to the next commit
git log # use ctrl+z to finish

git add -u                                # to stage deleted files from the whole tree [more info: http://stackoverflow.com/questions/1402776/how-do-i-commit-all-deleted-files-in-git


Other resets:
http://stackoverflow.com/questions/4114095/revert-to-previous-git-commit


git push
git pull
git reflog

git rm --chached file.txt                        #basic, the opposite of git add
file ".gitignore"                            #list in there all the files to be ignored

Ubuntu: tips on taking ScreenShots

To take an entire desktop screenshot:
      simply press the "print screen" button

To take a print screen of a specific window || selected are:
      Search for a program called "ScreenShot" or "Take ScreenShot".

To take a screenshot (with the above features) and automatically open into GIMP:
      On the GIMP menu, go to File>Create>ScreenShot

Tips on VirtualBox

v.m. = "Virtual Machine"

To scale your v.m. to fullscrenn:
Go to the title bar menu on the v.m.  View>choose your prefered option. Or use the shortcuts Host (generly right ctrl [there is a popup, when you inicialize the v.m., that tells you that]) + c || Host + f

To install a Shared Folder:
Turn the v.m. off. On the main menu, go to Settings>Shared Folder and set up the folder. Then, turn your v.m. on. Go to the title menu bar, Devices>Install Guest Addition. Then go to the CD/DVD driver (on the v.m.), run the wizard and install it. Done!

How to download an entire youtube playlist on Linux Ubuntu

First you have to install the youtube-dl (stands for youtube download):

sudo apt-get install youtube-dl

If you already have it installed, make sure it is updated:

sudo youtube-dl -U

Ok, to download the youtube playlist simply enter:

youtube-dl -cit <the youtube playlist link, between quotation marks>

To understand what "c", "i" and "t" do, enter:

youtube-dl --help

Useful terminal commands on linux

To remove a folder and inside files (recursivelly), use:
rm -r <name of directory>

Handle Tips About Ubuntu

Where to find the list of default applications per file type:

~/.local/share/applications/mimeapps.list


Where to find the executables of all the programs:

/usr/bin


Where to find the .desktops of all the programs:

/usr/share/applications

Tips to configure the wireless router

On the wireless router,

Look for MTU. Using Velox (Oi), the PPPoE default value is 1492, and PPPoA is 1500.
Then, look for Beacon Interval, and set it to the minium value. Repeat it for DTIM.

Ok, it's this! :)

Using g++

To compile (and link) a .cpp file:

g++ -o <executable file name> <.cpp file name>

To run the binary file, enter:

./<executable file name>

Como melhorar sua conexao wireless no Ubuntu?

Olá, esta é uma dica para quem está com problemas de lentidão, desconexão frequente e afins no Ubuntu lts 12.04.
Basicamente esta dica se refere ao Network-Manager, o gerenciador de rede padrão do ubuntu. Na sua versão atual (hoje é 14/09/2014, infelizmente não encontrei o código da versão no repositório apt-get), disponível, foram encontrados bugs que resultam no seu péssimo desempenho.