sqlite3 Issues – Error installing sqlite3 – sqlite3 requires Ruby version >= 1.9.1

Errors as follows, common problem is not having the header files installed or installing the gem sqlite3 when you actually want sqlite3-ruby.

sudo gem install sqlite3
ERROR:  Error installing sqlite3:
sqlite3 requires Ruby version >= 1.9.1.
Fix with: Read the rest of this post »
Posted on July 6, 2010 at 1:48 pm by Jordan Carter · Permalink · 2 Comments
In: Ruby on Rails, Server Config · Tagged with: ,

RubyGem nokogiri failed to install – libxslt is missing – Error installing nokogiri

Had trouble installing nokogiri until I installed dependencies.

libxslt is missing
#or
libxml2
sudo apt-get install libxslt-dev libxml2-dev

Full Error Stacktrace:

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Posted on June 29, 2010 at 2:22 pm by Jordan Carter · Permalink · 11 Comments
In: Ruby on Rails, Server Config · Tagged with: , ,

Memcached – Libmemcached already built; run ‘rake clean’ first if you need to rebuild.

Trying to install memcached ruby gem on Ubuntu 10.04 Lucid Lynx and I get the error

Libmemcached already built; run ‘rake clean’ first if you need to rebuild.

Fixed this by installing

sudo apt-get install libsasl2-dev
gem uninstall memcached && gem install memcached

Full Error Stacktrace:

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Posted on June 28, 2010 at 2:10 pm by Jordan Carter · Permalink · 5 Comments
In: Ruby on Rails, Server Config, Ubuntu Tricks · Tagged with: , ,

Developing Ruby on Rails on Ubuntu Lucid Lynx 10.04

Update: For Installing Ruby on Rails onto a Ubuntu Server (Lucid Lynx 10.04) goto this post

Developing for any Web Application can be helped by developing in the same environment as the deployment.  For me this means that running Ubuntu Desktop and deploying onto Ubuntu Server is a no brainer.  Most Ruby on Rails developers you’ll find today use a Mac and Textmate.  I learnt Ruby on Rails in the same scene, and Textmate is awesome.  It is yet to be matched by another text editor.

There are some things that I don’t like about Mac, or I guess I prefer about Ubuntu/Linux.  The procedure to install something on a Linux machine is so painless.  Ruby Gems works really well.  Xapian is a breeze to install on a linux machine, Postgresql installs with one command in less than 20 seconds!  The last time I installed Postgresql on a Mac (and had the development headers, so you can install the gem..) it took the good part of an hour.

We have now all been blessed with the latest LTS (long term support) Ubuntu release.  It is pleasant on the eyes, right out of the box!  It fast the fastest boot time I have seen (I have used WinXp, Vista, Win7, OSX)

I would be confident when I say almost all Ruby on Rails deployments are to a linux environment.  Probably Red Hat, but I prefer Ubuntu just because of the ease of use and my familiarity of it.  So to get yourself up and running on Ubuntu Desktop and Developing Ruby on Rails, follow below! Read the rest of this post »

Posted on June 8, 2010 at 2:54 pm by Jordan Carter · Permalink · Leave a comment
In: Ruby on Rails, Server Config · Tagged with: 

Package ‘adobe-flashplugin’ is Virtual when installing Flash on Firefox or Chrome – Ubuntu Lucid Lynx 10.04 64

Trying to install Flash on Ubuntu 10.04 64 bit fails with the error

Package ‘adobe-flashplugin’ is Virtual

I managed to install it with the following pasted into terminal.

sudo add-apt-repository ppa:sevenmachines/flash && sudo apt-get update && sudo apt-get install flashplugin64-installer
Posted on June 8, 2010 at 9:36 am by Jordan Carter · Permalink · 13 Comments
In: Ubuntu Tricks · Tagged with: , , ,

Share Keyboard and Mouse between Two or Multiple Computers

I have three computers at my desk.  No reason other than I am a geek.  I have a desktop, nice beasty thing.  I have a Tablet Laptop and I have a netbook.

I wanted to connect them all up so that I could use the screen space on them, put twitter on one maybe, gmail on another.

The answer is Synergy

Synergy lets you easily share a single mouse and keyboard between multiple computers with different operating systems, each with its own display, without special hardware. It’s intended for users with multiple computers on their desk since each system uses its own monitor(s).

It is easy to setup and seems to be in the repos, install by:

sudo apt-get install synergy

You then need to have a config file, it has a default name but I prefer to call it .synergy, mine as follows.
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Posted on June 4, 2010 at 9:42 am by Jordan Carter · Permalink · Leave a comment
In: Ubuntu Tricks · Tagged with: 

Sending Emails with Rails, multipart html plain with Attachments

When trying to send attachments along with type versons of an email (html and plain text) you might notice that there is no content in your email message.  While I found this out too.  Simple if not over the top solution.

The trick is that you have to put the html and plain part inside a “multipart/alternative” block.  If you don’t you’ll end up sending no message with the email, or you’ll send two attachments, the actual attachment (image etc.) and a message attachment.  Not ideal!

Koz, so a friend of mine pointed out my problems and I ended up with the following.

def send_photo(employee)
recipients “[email protected]
from “[email protected]
subject “Security Photo”
sent_on Time.now
part(:content_type => “multipart/alternative”) do |p|
p.part :content_type => “text/html”, :body => render_message(“send_photo.text.html.erb”, :employee => employee)
p.part :content_type => “text/plain”, :body => render_message(“send_photo.text.plain.erb”, :employee => employee)
end
unless employee.security_photo.path.nil?
attachment :content_type => employee.security_photo_content_type,
:body => File.read(employee.security_photo.path(:medium_email))
end
end
Posted on June 3, 2010 at 5:36 am by Jordan Carter · Permalink · 3 Comments
In: Ruby on Rails · Tagged with: , ,

VirtualBox shared folder guest access command

Enable shared folders
Add shared folder via “Devices” > “Shared Folder…”

Windows from virtualbox.org

net use x: \\vboxsvr\sharename

Linux from virtualbox.org

mount -t vboxsf [-o OPTIONS] sharename mountpoint

Sharename is for example (by default) if you shared your Hosts Desktop, it would be Desktop.  Easy.

Posted on May 18, 2010 at 10:36 am by Jordan Carter · Permalink · Leave a comment
In: Ubuntu Tricks · Tagged with: ,