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20150603-1 选题
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Arc Is a Gorgeous GTK Theme for Linux Desktops
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================================================================================
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It has been a veritable eon since we last highlighted a GTK theme here on this site.
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But seeing Arc, pictured above, rectifies that.
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We couldn’t not mention it.
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### Arc GTK Theme ###
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Transparency. Not to everyones’ taste.
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Arc is a flat theme with a subtle color scheme and transparency in select parts of the window, like GTK Header Bars and the Nautilus sidebar.
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The see through effect does not, as in themes we past, render the entire app a peek-a-boo mess. Like on OS X Yosemite, the effect is used sparingly and to great effect.
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A companion icon set (called Vertex, and pictured) is also in the works.
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**Yes, it supports Unity**
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The Arc theme supports GTK3 and GTK2 based desktop environments, including GNOME Shell (of course) and the standard Ubuntu Unity desktop.
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It also works just dandy with lightweight Budgie and elementary’s Pantheon desktops and should work fine on Cinnamon.
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Switches, sliders and widgets in Arc
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For all its style it is not the easiest theme to download and install — *understatement klaxon* — because it’s still under active development.
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The package requirements of GTK 3.14 or later also mean Ubuntu 14.04 LTS and 14.10 users are left out in the cold on this one.
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Those of you running Ubuntu 15.04 can use the theme. You can’t (yet) add a PPA or double-click a .Deb package. If you like what you see you’ll need to roll up your sleeves and check out the compile instructions on the project Github page.
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- [Arc Theme Install Instructions on Github][1]
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--------------------------------------------------------------------------------
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via: http://www.omgubuntu.co.uk/2015/06/arc-gtk-theme
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作者：[Joey-Elijah Sneddon][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://plus.google.com/117485690627814051450/?rel=author
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[1]:https://github.com/horst3180/Arc-theme
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Here's How to Install the Beautiful Arc GTK+ Flat Theme on Linux
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================================================================================
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> Step-by-step tutorial with easy-to-follow instructions
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**Today we're introducing you to a newly released GTK+ theme that features transparent and flat elements and is compatible with multiple desktop environments and Linux distributions. [The theme is called Arc][1].**
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Before going into detail, we suggest that you take a quick look at the gallery attached below, so you have a basic idea of what the theme looks like. Also, you should be aware that it currently works with GTK+ 2.x, GTK+ 3.x, GNOME-Shell, Budgie, Unity, and Pantheon user interfaces, all of them using the GNOME Stack.
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Also, the developer of the Arc theme informs us that it has been successfully tested on the Ubuntu 15.04 (Vivid Vervet), Arch Linux, elementary OS 0.3 Freya, Fedora 21, Fedora 22, Debian GNU/Linux 8.0 (Jessie), Debian Testing, Debian Unstable, openSUSE 13.2, openSUSE Tumbleweed, and Gentoo Linux operating systems.
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### Requirements and installation instructions ###
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To build the Arc theme, you will need to first install some packages, such as autoconf, automake, pkg-config (pkgconfig for Fedora), libgtk-3-dev for Debian/Ubuntu-based distros or gtk3-devel for RPM-based ones, git, gtk2-engines-pixbuf, and gtk-engine-murrine (gtk-murrine-engine for Fedora).
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The Arc theme does not yet have binary packages, so you will need to grab the latest source code from the project's Git repository and compile it. Therefore, open a Terminal app and run the following commands, one by one, hitting the Enter key after each one and waiting for the previous command to finish before adding the next.
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git clone https://github.com/horst3180/arc-theme --depth 1 && cd arc-theme
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git fetch --tags
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git checkout $(git describe --tags `git rev-list --tags --max-count=1`)
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./autogen.sh --prefix=/usr
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sudo make install
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That's it! At this moment, the Arc theme is currently installed on your GNU/Linux distribution and you can activate it using either the GNOME Tweak Tool utility if you're using GNOME or the Unity Tweak Tool software if you are running Ubuntu's Unity desktop. Have fun and don't forget to drop a screenshot with your setup in the comments section below.
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--------------------------------------------------------------------------------
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via: http://news.softpedia.com/news/Here-s-How-to-Install-the-Beautiful-Arc-GTK-plus-Flat-Theme-on-Linux-483143.shtml
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作者：[Marius Nestor][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://news.softpedia.com/editors/browse/marius-nestor
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[1]:https://github.com/horst3180/Arc-theme
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Installing Ruby on Rails using rbenv on Ubuntu 15.04
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================================================================================
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This article we will learn about how to Install Ruby on Rails with rbenv on Ubuntu 15.04. We choose Ubuntu as operating system because Ubuntu is one of Linux distribution that easy to use with a lots of package support and complete documentations , so I think this is the right choice. If you don't install the latest version Ubuntu yet, you can [download the ISO file][1] to start off.
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### Installing Ruby ###
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First thing we need to update ubuntu packages and install some dependencies for Ruby.
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sudo apt-get update
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sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev
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There are three methods to install Ruby such rbenv, rvm and from the source. Each have their own benefits, but these days many developers prefer to use rbenv installation method than rvm or from source. We will install the latest version of Ruby, version 2.2.2.
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Installing with rbenv is a simple two step process. First you install rbenv, and then ruby-build :
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cd
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git clone git://github.com/sstephenson/rbenv.git .rbenv
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echo 'eval "$(rbenv init -)"' >> ~/.bashrc
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exec $SHELL
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git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
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echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
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exec $SHELL
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git clone https://github.com/sstephenson/rbenv-gem-rehash.git ~/.rbenv/plugins/rbenv-gem-rehash
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rbenv install 2.2.2
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rbenv global 2.2.2
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ruby -v
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We need to install Bundler but before that we tell Rubygems not to install the documentation for each package locally.
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echo "gem: --no-ri --no-rdoc" > ~/.gemrc
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gem install bundler
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### Configuring GIT ###
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Before configuring GIT you have to create github account first, you can register [Git][2]. We need Git for our version control system so we are going to set it up to match our Github account.
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Replace **Name** and **Email address** in the following steps with the ones you used for your Github account.
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git config --global color.ui true
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git config --global user.name "YOUR NAME"
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git config --global user.email "YOUR@EMAIL.com"
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ssh-keygen -t rsa -C "YOUR@EMAIL.com"
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After that take the newly generated SSH key and add it to your Github account. And then you need to copy and paste the output of the following command and [paste it here][3].
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cat ~/.ssh/id_rsa.pub
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If you done of this, check and see if it worked
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ssh -T git@github.com
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You should get a message like this
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Hi excid3! You've successfully authenticated, but GitHub does not provide shell access.
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### Installing Rails ###
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We need to install javascript runtime like NodeJS because these days Rails ships with so many dependencies. With this way we can combines and minify your javascript to provide a faster production environment.
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We need to add PPA repository for installing nodeJS
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sudo add-apt-repository ppa:chris-lea/node.js
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sudo apt-get update
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sudo apt-get install nodejs
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If you find a problem while updating repository packages, you should try to do this command :
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# Note the new setup script name for Node.js v0.12
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curl -sL https://deb.nodesource.com/setup_0.12 | sudo bash -
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# Then install with:
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sudo apt-get install -y nodejs
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Next step, follow this command :
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gem install rails -v 4.2.1
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Because we are using rbenv, make the rails executable available with the following command below
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rbenv rehash
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To make sure the Rails have installed correcly, you can run the rails -v and this will show like this
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rails -v
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# Rails 4.2.1
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For some reason your environment may not be setup properly if you get different result.
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### Setting Up MySQL ###
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You may already be familiar with MySQL, you can install MySQL server and client from Ubuntu repository. You will set the password for the root user on installation process. This information will go into your Rails app's database.yml file in the future. Follow the command line below :
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sudo apt-get install mysql-server mysql-client libmysqlclient-dev
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Installing the libmysqlclient-dev gives you the necessary files to compile the mysql2 gem which is what Rails will use to connect to MySQL when you setup your Rails app.
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### Last Step ###
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Let's try to create your first Rails Application :
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# Use MySQL
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rails new myapp -d mysql
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# Move into the application directory
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cd myapp
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# Create Database
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rake db:create
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rails server
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Visit http://localhost:3000 to view your new website. Now you have got machine setup and ready to build some Rails application.
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If you received an error message when you create database that said Access denied for user 'root'@'localhost' (Using password: NO) then you need to update your config/database.yml file to match the database **username** and **password**.
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# Edit your database.yml in config folder
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nano config/database.yml
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and then fill the password field with your MySQL root password.
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Exit (Ctrl+X) and save.
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### Conclusion ###
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Rails is written in Ruby, the programming language which is also used alongside Rails. Ruby on Rails can be installed in three methods such rbenv, rvm and from the source on Ubuntu 15.04. Here in this tutorial we've used rbenv method and MySQL as database. If any question or suggestion, please write them in the comment below.
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--------------------------------------------------------------------------------
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via: http://linoxide.com/ubuntu-how-to/installing-ruby-rails-using-rbenv-ubuntu-15-04/
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作者：[Obet][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:http://linoxide.com/author/obetp/
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[1]:http://release.ubuntu.com/15.04
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[2]:http://github.com
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[3]:https://github.com/settings/ssh
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