Docker is a platform for developers and sysadmins to develop, ship, and run applications. Docker lets you quickly assemble applications from components and eliminates the friction that can come when shipping code. Docker lets you get your code tested and deployed into production as fast as possible.

redmine@mail rubygems-2.6.12$ ruby -v ruby 2.4.1p111 (2017-03-22 revision 58053) x8664-linux redmine@mail rubygems-2.6.12$ which ruby /usr/sbin/ruby. RubyGems.org is the Ruby community’s gem hosting service. Instantly publish your gems and then install them. Use the API to find out more about available gems. Become a contributor and improve the site yourself. RubyGems.org is made possible through a partnership with the greater Ruby community. If you try rails new foo to build a new Rails application with RubyGems 1.8.23 and Ruby 1.9.3-p194 you'll get an error because RubyGems now verifies SSL certificates and Bundler tries to connect with when you build a new Rails app and is wrongly configured for SSL connections. If you've been itching to try out Ruby and/or Rails, if the Terminal is somewhat new to you, you may find that even the process of installing it can generate countless confusing errors. This article will detail the exact steps you need to follow to get Ruby up and running on your Mac. A sample permissions error (triggered when you try to install the jekyll gem such as gem install jekyll) might look like this for Rubygems: ERROR: While executing gem. (Gem::FilePermissionError) You don't have write permissions for the /Library/Ruby/Gems/2.0.0 directory. Instead of changing the write permissions on your operating system’s version of Ruby and Rubygems (which could pose security issues), you can install another instance of Ruby (one that is writable) to get around this.

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Docker for Mac

Docker for Mac is the current release of Docker for OSX. Requirements:

• Mac must be 2010 or new model with Intel's hardare support for memory management unit (MMU, virtualization, and Unrestricted mode.
• OSX El Capital 10.11 and newer releases are supported.
• Virtualbox prior to version 4.3.30 must NOT be installed. It is incompatiable. Use a newer version.

Install Docker for Mac

Docker for Mac can be downloaded here.

Docker Toolbox

Docker Toolbox is a legacy desktop solution for older Mac and Windows systems that do not meet the requirements of Docker for Mac and Docker for Windows.

Before you install Docker Toolbox

In order to simplify the installation process you should install homebrew-cask which provides a friendly homebrew-style CLI workflow for the administration of Mac applications distributed as binaries. Refer to this article in order to install homebrew-cask.

Install Docker Toolbox

Use can use cask to install Docker Toolbox which is a collection of useful docker tools such as compose, machine and Kitematic.

Docker Toolbox Quick Start

For quick start find the Docker Quickstart Terminal and double click to launch it. Then you start the hello world container using:

You can find more about docker follow the documentation here.

Ruby developers beware: a would-be cryptocurrency thief is out to get at your digital wallet, and they’re using typosquatting code to do it.

Typosquatters use misspellings of popular names to misdirect victims into using the wrong thing. It’s been a problem for websites for years, but it’s becoming an increasing issue for software developers too. Rather than reinventing the wheel by writing their own code to handle common tasks, they write it once as a software package and upload it to repositories. These repositories contain thousands of packages for developers to download. The upside is that it accelerates software development. The downside? Developers don’t often known exactly what those packages are doing.

Security researchers at threat detection company Reversing Labs found typosquatters had uploaded a malicious package in RubyGems, which is a repository serving the Ruby programming language.

You can install a RubyGems package – known as a Gem – by typing gem install followed by the package’s name on the command line. Attackers take advantage of this by copying a legitimate package, inserting some malicious code, and then uploading it again with a similar name to target fat-fingered programmers. In this case, the author had engineered the package to steal victims’ cryptocurrency.

Reversing Labs is no stranger to malicious packages, although they’ve tended to be in the Python package repository PyPi and the NPM Node.js repository. It found a typosquatting package after analysing the entire PyPi repository in July 2019. It also found a password stealer in the NPM repository last year after a similar scan.

This time it honed its approach by finding the most popular Ruby gems and then monitoring the RubyGems repository file for new files that used misspellings of the legitimate packages, it flagged those for further analysis and dug into their code. It found over 700 packages containing a file with executable code using the same name: aaa.png. This was suspicious, because .png extensions indicate image files, not executable ones.

The most downloaded Gem in this group was atlas-client, which had been downloaded about a third as much as the legitimate atlas_client Gem.

Rubygems Issues For Mac Os

The booby-trapped Gem includes a script that activates if it’s running on Windows. If so, the script renames the file aaa.png to a.exe and runs it.

The a.exemalware file monitors the Windows clipboard for text that looks like a cryptocurrency address, something that is very likely to appear in the clipboard via Ctrl-C just before the user performs an online cryptocurrency transaction.

The sniffed-out cryptocoin address is then replaced in the clipboard itself with one belonging to the attackers, so that if a user subsequently pastes the address into the “send the money here” field on a cryptocurrency transaction page, then the crooks will receive the payment instead.

How To Install And Run Ruby On Mac OS X - Dummies

The malware also adds an entry to the Windows registry to make sure it gets reloaded when Windows starts up, for what’s known as persistence, meaning that the malware survives a logout or a reboot.

Rubygems Issues For Mac Catalina

Although we’ve seen cryptocurrency crimes carried out via the clipboard before, this attack is pretty niche, according to Reversing Labs. It only works against Ruby developers using Windows machines making bitcoin transactions. Perhaps that’s why the address used in the attack had no transactions at the time of writing.

The attacker is persistent, though. Judging by the use of just two user accounts in RubyGems and the common filename, they were probably responsible for most of the malicious gems, said Reversing Labs. It also noted that the file names had turned up in other attacks on RubyGems in the past.

The RubyGems security team has removed all the affected packages from its repository, but Ruby developers should check the list of malicious packages to ensure that they’re not running dodgy code.

These supply chain attacks have been a perennial problem for other repositories too. Another researcher also discovered a cryptocurrency-stealing package that used typosquatting in the Python PyPi repository in October 2018, and ten packages cropped up in 2017. Attackers have also targeted NPM repeatedly over the years, most recently in January.

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