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• Debugging Rails Applications
• How do I output a variable in a rspec test?

raise variable.to_yaml

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• Bash history handling with multiple terminals

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• API
• How can I uninstall Ruby on ubuntu?
• Latest version
• railscasts.com
• avod.me

###Server###

• https://gist.github.com/joneslee85/5844933
• http://tommy.chheng.com/2013/01/23/deploying-a-rails-app-on-nginxpuma-with-capistrano/
• http://stackoverflow.com/a/17451342/712308

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Watch logs:

tailf /home/luna/www/myapp/log/production.log
tailf /home/luna/www/myapp/log/development.log

Debug object:

puts variable.inspect

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Run:

rails g controller StaticPages index

In config/routes.rb add:

root "static_pages#index"

###Show variable contents from controller in view### ####Controller####

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#Nginx debug# Use strace. First, you need to detect PID of nginx process:

# ps ax | grep nginx
25043 ?        Ss     0:00 nginx: master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
25044 ?        S      0:02 nginx: worker process

Ok, so 25044 is the worker process. Now, we trace it:

# strace -p 25044 2>&1 | grep gz

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stat("/home/luna/www/myapp/public/", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
stat("/home/luna/www/myapp/public/assets/application-58c7c0e35a67f189e19b8c485930e614.css", {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
open("/home/luna/www/myapp/public/assets/application-58c7c0e35a67f189e19b8c485930e614.css.gz", O_RDONLY|O_NONBLOCK) = 11
stat("/home/luna/www/myapp/public/assets/application-67fb624685eb5c3c2d8351122ac368a1.js", {st_mode=S_IFREG|0664, st_size=106238, ...}) = 0
open("/home/luna/www/myapp/public/assets/application-67fb624685eb5c3c2d8351122ac368a1.js.gz", O_RDONLY|O_NONBLOCK) = 12
# /home/luna/www/myapp/public/assets/application-67fb624685eb5c3c2d8351122ac368a1.js deleted
stat("/home/luna/www/myapp/public/", {st_mode=S_IFDIR|0775, st_size=4096, ...}) = 0
stat("/home/luna/www/myapp/public/assets/application-58c7c0e35a67f189e19b8c485930e614.css", {st_mode=S_IFREG|0664, st_size=0, ...}) = 0
open("/home/luna/www/myapp/public/assets/application-58c7c0e35a67f189e19b8c485930e614.css.gz", O_RDONLY|O_NONB

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#VirtualBox tips and tricks# ##Shrink disk size## In Total Commander browse to c:\Program Files\Oracle\VirtualBox and run cmd in bottom command line. Then in cmd:

VBoxManage modifyhd "d:\VirtualBox\VMs\Ubuntu 12.04 LTS amd64\Ubuntu 12.04 LTS amd64.vdi" compact

source

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  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100   184  100   184    0     0    106      0  0:00:01  0:00:01 --:--:--   147
100 19527  100 19527    0     0   7715      0  0:00:02  0:00:02 --:--:-- 35754
Turning on auto dotfiles mode.
Please read and follow further instructions.
Downloading RVM branch stable
Downloading https://github.com/wayneeseguin/rvm/archive/stable.tar.gz to rvm-stable.tgz.
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

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#Ruby on Rails installation on Ubuntu 12.04 LTS + Nginx + Puma# ##Adding new user## Create new user:

sudo useradd -G sudo -m -s /bin/bash luna

blog.lunarlogic.io

Change password: