Manual do Hacker Especial - Volume 2 (2019-07)

Manual do Hacker Especial | 7

gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @
task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $
bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.
add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.
Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/
bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) {
$screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group
:development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.
html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails generate migration addpriority
to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.
now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star =
[randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep);
use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i]
-= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem
install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head
:no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate
$ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random
import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.
append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for
($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; }
$screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $
rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” }
format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails
server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init()
screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in
pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80);
$star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen-

refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit
respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status:
:unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_thepast def due
at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480))
clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.
QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4)

• 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~>
  0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respondto do |format| if @task.update
  attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails
  generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in
  the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in
  range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100;
  use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i
  < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem
  “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task,
  notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer
  $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python
  import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0,
  479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new
  Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i]
  < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install
  rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html
  { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate
  $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS
  = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.
  tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++)
  { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i],
  “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-
  test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors,
  status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def
  due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640,
  480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type ==
  pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i]
  = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem
  “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.
  update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.errors, status: :unprocessable_entity } $ bundle
  exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_in_the_past def due_at_is_in_thepast errors.add(:due
  at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAX_STARS = 100 pygame.init() screen = pygame.display.set_mode((640, 480)) clock = pygame.time.Clock() stars
  = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.type == pygame.QUIT: exit(0) #!/usr/bin/perl
  $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24); $star_s[$i] = rand(4) + 1; } while (1) { $screen-
  clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem “therubyracer”, “~> 0.11.4” group
  :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.
  html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist
  --skip-test-unit respond_to do |format| if @task.update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit” } format.json { render json: @task.
  errors, status: :unprocessable_entity } $ bundle exec rails generate migration add_priority_to_tasks priority:integer $ bundle exec rake db:migrate $ bundle exec rake db:migrate $ bundle exec rails server validate :due_at_is_inthe
  past def due_at_is_in_the_past errors.add(:due_at, ‘is in the past!’) if due_at < Time.zone.now #!/usr/bin/en python import pygame from random import randrange MAXSTARS = 100 pygame.init() screen = pygame.display.set
  mode((640, 480)) clock = pygame.time.Clock() stars = for i in range(MAX_STARS): star = [randrange(0, 639), randrange(0, 479), randrange(1, 16)] stars.append(star) while True: clock.tick(30) for event in pygame.event.get(): if event.
  type == pygame.QUIT: exit(0) #!/usr/bin/perl $numstars = 100; use Time::HiRes qw(usleep); use Curses; $screen = new Curses; noecho; curs_set(0); for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] = rand(80); $star_y[$i] = rand(24);
  $star_s[$i] = rand(4) + 1; } while (1) { $screen->clear; for ($i = 0; $i < $numstars ; $i++) { $star_x[$i] -= $star_s[$i]; if ($star_x[$i] < 0) { $star_x[$i] = 80; } $screen->addch($star_y[$i], $star_x[$i], “.”); } $screen->refresh; usleep 50000; gem
  “therubyracer”, “~> 0.11.4” group :development, :test do gem “rspec-rails”, “~> 2.13.0” $ gem install bundler $ gem install rails --version=3.2.12 $ rbenv rehash $ rails new todolist --skip-test-unit respond_to do |format| if @task.
  update_attributes(params[:task]) format.html { redirect_to @task, notice: ‘...’ } format.json { head :no_content } else format.html { render action: “edit”

Distros

Qual é o ambiente de desktop

ideal? Escolha entre Gnome, KDE

e outros. Confira também o

combate entre Windows e Linux

8 Desktops Linux

9 Instalação e suporte

9 Aplicativos padrão

10 Aparência

10 Ajuda e documentação

11 Performance

12 Extensões e add-ons

12 Configurabilidade

13 O veredicto

14 Sistemas alternativos

15 Hardware

15 Facilidade de instalação

16 Desempenho

16 Nível e qualidade de suporte

17 Status de desenvolvimento

18 Recursos e aplicativos

18 Primeiro contato

19 O veredicto

20 Linux vs Windows

21 Windows é coisa do passado

22 Recursos familiares

24 Performance do sistema

25 Desktop e aplicativos

36 Hardware e drivers

37 Muito além do desktop

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