1. Agile Web Development with Rails 4
2. Learn Ruby the Hard Way
3. Refactoring Ruby Edition
4. Everyday Rails Testing with RSpec
5. Confident Ruby
6. The Ruby Programming Language: Everything You Need to Know
7. The Well-Grounded Rubyist
8. Ruby on Rails Tutorial
9. Programming Ruby – The Pragmatic Programmer?s Guide
10. Rails 4 in Action: Revised Edition of Rails 3 in Action
Writing this post after a long long time almost a gap of around 1+ year.
Nginx – I have been a big fan of nginx since the time I came to know about it. Have written many blogs about the same in the past. Most of the apps deployed by me are on Nginx.
Its always good to have nginx upgraded to the latest version. Below are the steps for the same
First of all check the existing version of nginx using
Now take the back of the existing nginx
sudo cp /etc/nginx/nginx.conf /etc/nginx/nginx.conf.1.1.19.backup
Now Stop the service
sudo service nginx stop or /etc/init.d/nginx stop
Install dependencies (might not be required)
sudo aptitude install python-software-properties
Add the repository for the stable version of Nginx
sudo add-apt-repository ppa:nginx/stable
Now update and upgrade
sudo aptitude update
sudo aptitude safe-upgrade
Once done. start nginx
sudo service nginx restart or /etc/init.d/nginx start
Again check the version (For confirmation)
Voila!! its done. Njoy safe and secure web apps.
Please post your comments in case you face any issues in upgrading nginx.
Had to upgrade OpenSSH to 6.6p for PCI Compliance. Found that 12.04 does not support OpenSSH 6.6p via direct upgrade. So Had to do it manually. After some research found that it can be done easily with 3-4 steps
1) Download portable version of OpenSSH from
2) Run the following command
tar -xvf openssh-6.6p1.tar.gz
./configure –prefix=/usr –sysconfdir=/etc/ssh \
3) make install
4) Check Version using
you should see it as OpenSSH_6.6p1
If you do not see it restart your sshd service and check again.
Do comment for any questions.
The OpenSSL project has recently announced a security vulnerability in OpenSSL affecting versions 1.0.1 and 1.0.2 (CVE-2014-0160).
Users who are using Ubuntu specifically 12.04 LTS and having openssl version 1.0.1 needs to upgrade to 1.0.1g
First of all find out how to see if your website is vulnerable or not.
Go to http://filippo.io/Heartbleed/ type in your domain and see the result.
If you see that your website is Vulnerable check the Open ssl version using the command below
openssl version -v
IF it is 1.0.1 or 1.0.1a….f You need to upgrade it to 1.0.1g
Below the single command line to compiling and install the last openssl version.
curl https://www.openssl.org/source/openssl-1.0.1g.tar.gz | tar xz && cd openssl-1.0.1g && sudo ./config && sudo make && sudo make install
Replace old openssl binary file by the new one via a symlink.
sudo ln -sf /usr/local/ssl/bin/openssl `which openssl`
Now run the command to check the version again and you will see the new version of openssl
Hope this helps. If you face any issue please feel free to comment.
Finally got some time to update the blog. Recently I was configuring a rails app on windows 7 machine (ah! I know now no one uses windows for development but it was a requirement 🙁 ) and I had to install json gem.
As soon as I did gem install json I got a weird error.
ERROR: Error installing json:
The ‘json’ native gem requires installed build tools.
Please update your PATH to include build tools or download the DevKit from ‘http://rubyinstaller.org/downloads’ and follow the instructions at ‘http://github.com/oneclick/rubyinstaller/wiki/Development-Kit’
Then I went and downloaded DevKit-4.5.0-20100819-1536-sfx.exe. Extracted it to C:\DevKit. And then from the command prompt I executed the following commands.
ruby dk.rb init
The command above will create a config.yml file where you need to verify where you ruby is installed and set it accordingly if there is any change.
ruby dk.rb review
The command above will show you the path where its pointing to.
ruby dk.rb install
The command above will install devkit.
Thats all!! Now again try gem install json and woo it works!!
Hope this helps.
If you get stuck with this strange error of uninitialized constant ActiveSupport::Dependencies::Mutex (NameError) don’t worry.
Just follow the steps below :-
gem update –system 1.5.3
once its installed successfully do gem list and see if you have any other versions of rubygems-update already installed. If so remove all the others apart from 1.5.3
Once you do that run the following command
The above command will show that 1.5.3 is installed. Do confirm the same by checking the gem version gem -v
Hope this helps. In case you have any query related to this do post a comment and I will get back ASAP