Install MongoDB on Snow Leopard

I have to install MongoDB on a Linode server with Ubuntu 10.04. So I decided to install it on my MBP first. It’s a cool little database, and John Nunemaker’s MongoMapper gem is a treat.

Here’s how I got the server installed and running as a daemon in Snow Leopard for local development.

Download, unpack, and install the pre-compiled 32-bit binaries:

curl -O http://downloads.mongodb.org/osx/mongodb-osx-i386-1.4.0.tgz
tar xzf mongodb-osx-i386-1.4.0.tgz
sudo mv mongodb-osx-i386-1.4.0 /usr/local/mongodb
sudo mkdir /usr/local/mongodb_data /var/log/mongodb
sudo chown -R root /usr/local/mongodb

(If you’re on a 64-bit machine, substitute in x86_64 for each i386 above.)

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MySQL 5.5.8 can’t start automatically on Mac OS 10.6.6

After resolving the problem of MySQL and mysql gem I got another problem: MySQL 5.5.8 didn’t start automatically when I boot my computer.

Don’t be serious, you can fix it easily by modifying mysql.server file.
Open /usr/local/mysql/support-files/mysql.server with your favorite text editor, locate the configuration of basedir= and datadir=, change them to:

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data

and the problem gone, your MySQL server now starts automatically everytime you boot the computer.

now you can start the MySQL server manually (no need to reboot) by this command:

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Deploy Rails app from Github to Heroku

Recently I found deploying your Rails code which already on Github to Heroku is very useful. You can use this to show your work to your customers, friends …. Let’s start

= GITHUB

== Generate a keypair

cd ~/.ssh
ssh-keygen -t rsa -C “your@mail.com”
(enter at first prompt)

Then go to your github account then add that key in id_rsa.pub. Should use a text editor then ctrl-A to select all.

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how to setup tr.im on Bluehost

Ok, some days ago a friend of mine asked me to write a tutorial on how to install a Tr.im application. Actually, I had successfully installed it on Bluehost (failed on Justhost, I think there’re some problems with dispatch.cgi/fcgi/rb on Justhsot)

Tr.im application is a combination of 3 applications: trim, trim_api and trim_redirect. We have to modify the configuration files in trim/config/ only (no need on that 2 remaining apps)

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Install and use your custom gems on Bluehost

It’s very normal your Rails app has to run under a Rails version different from the one on Bluehost (or any other hosts). If so, we have to find a way to install our own Rails gem and let the application knows about it.

Install a new gem on Bluehost (or any other hosts) is easy, just run

gem install gem_name -v=gem_version

Next, we’ll let our app where our own gems are located. In your ~/.bashrc, added these:

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Easily setup Rails app on Bluehost

Hi guys, below is the steps to setup a Rails application on Bluehost. Really easy

– create new sub domain (a folder named /public_html/sub_domain_name will be created automatically)
– delete the above folder
– “rails app_name”
– create soft link: “ln -s /path/to/your/app_name /public_html/sub_domain_name”
– create database (by cPanel)
– create mysql user (by cPanel)

– add user to database (and grant *ALL* privileges)

– modify /config/database.yml file to match the username/password, database name of mysql
– “rake rails:update:generate_dispatchers” to create 3 dispatchers.rb/cgi/fcgi (will use fcgi, chmod 755)
– create .htaccess with content:

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NERDTree – file and directory navigator for VIM

I used to code on Windows using e-texteditor. I find e it’s very useful and light weight, that’s why I like it.

Recently I have to switch to CentOS, so I begin to code using Vim. After hours searching on the Internet, I found NERDTree, a Vim plugin that makes Vim very comfortable. NERDTree provides a folder tree on the left hand side for you to navigate. Moreover you can set your personal options to make your own working enviorenment.

Personally, after setting these options, I think Vim on Centos becomes e-texteditor on Windows, which is my favorite editor.

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