install ruby and ruby on rails on ubuntu 12.04

In summary

• update your system
• install git, curl, rvm
• install required packages
• install rails
• done

Step by step

Update system

sudo apt-get update

Install git

sudo apt-get install git

Install curl

sudo apt-get install curl

Install rvm

curl -L get.rvm.io | bash -s stable

Reload to start using rvm

source ~/.rvm/scripts/rvm

or 

source /home//.rvm/scripts/rvm

Check required packages

rvm requirements

and then copy the install command from output, it should look like this

sudo apt-get -y install build-essential openssl libreadline6 libreadline6-dev zlib1g zlib1g-dev libssl-dev libyaml-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev libxslt-dev autoconf libc6-dev ncurses-dev automake libtool bison subversion

Install Javascript runtime

sudo apt-get install nodejs

Install ruby

rvm install 1.9.3

(1.9.3 is the newest version at the time of this writing)

Set ruby version to default

rvm use 1.9.3 --default

Install rails

gem install rails

Done

start your app and see it works! cheers!

references: http://blog.sudobits.com/2012/05/02/how-to-install-ruby-on-rails-in-ubuntu-12-04-lts/

ubuntu - install LAMP server with one click

tasksel is a good service for installing LAMP on ubuntu 12.04 and 11.10

sudo apt-get install tasksel

sudo tasksel

this can be used to install postgreSQL and many others

ubuntu - preventing apache and mysql from auto start when computer starts

• apache2 uses System V style init scripts. To disable it from boot:
  sudo update-rc.d -f apache2 remove
• However, mysql uses an Upstart job, to disable it, create an "override" file:
  echo "manual" | sudo tee /etc/init/mysql.override

To learn more about override files, see: The Upstart Cookbook

backup and restore mysql in ubuntu

although i use ubuntu with shell, you can use whatever linux's distribution, command should like the same

backup mysqlmysqldump -u [username] -p [password] [database'name] > [backup'sname]
exp: mysqldump -u root -p 123 mysite > mysite.bak.sql


restore from file backupmysql -u [username] -p [password] [database'name] < [backup'sname]

note that the only different is mysql <> mysqldump and > <> <exp: mysql -u root -p 123 mysite < mysite.bak.sql
click here for more details

happy coding!