sudo apt-get install xvfb
sudo apt-get install xfonts-100dpi xfonts-75dpi xfonts-scalable xfonts-cyrillic

xvfb-run -a -n 99 bundle exec rspec spec

repo_path = 'another project absolute path'

Bundler.with_clean_env do
  Dir.chdir repo_path do
    %x{bundle install}
  end
end

...

Bundler.with_clean_env do
  Dir.chdir repo_path do
    %x{rspec spec --format html --out rspec_results.html --format documentation --out rspec_results.txt}
  end
end

# echo $PS1
# \h:\W \u\$

export PS1='$(whoami)@$(hostname):$(pwd)'

export PS1='$(pwd): '

export PS1='${PWD##*/}: '

export CLICOLOR=1
export LSCOLORS=ExFxBxDxCxegedabagacad
export PS1="\[\033[36m\]\u\[\033[m\]@\[\033[32m\]\h:\[\033[33;1m\]\W\[\033[m\]\$ "

# XXX: owner/group(users in owner's group)/otherUsers

x = 4: 'read' permission
x = 2: 'write' permission
x = 1: 'exec' permission

sudo chmod 600 file (only owner has read, write permission)
sudo chmod 644 file (owner has read and write permission, group users and other users has only read permission)

sudo chmod 700 file (only owner has read, write and exec permission)
sudo chmod 666 file (everyone has read, write permission)
sudo chmod 777 file (everyone has read, write and exec permission)

sudo chmod go-x file (cancel the exec permission of group and other users)

sudo apt-get install -y build-essential openssl libreadline6 libreadline6-dev curl zlib1g zlib1g-dev libyaml libxml2 libxslt autoconf libc6-dev ncurses-dev automake libtool bison pkg-config git-core subversion

gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
\curl -L get.rvm.io | bash -s stable

source ~/.rvm/scripts/rvm

rvm list known
rvm install 2.0.0

gem source -r https://rubygems.org/
gem source --add http://ruby.taobao.org/
gem source -l # 查看gems源