ubuntu安装 ralis ruby

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gem update --system ：gem更新

安装ruby1.9.2

1.先去官网下载安装包，略～
2.打开终端输入几个命令：
(1)tar jxvf ruby-1.9.2-p0.tar.bz2
(2)cd ruby-1.9.2-p0
(3)./configure –prefix=/usr/local/ruby
(4)sudo make
(5)sudo make test
(6)sudo make install
(7)sudo gedit /etc/environment
3.加入:/usr/local/ruby/bin

具体可参见http://xiang.lu/2010/12/ubuntu-%E5%AE%89%E8%A3%85-ruby1-9-2/

rvm安装：http://blog.csdn.net/imafish_i/article/details/6533747

安装sqlite：apt-get install libsqlite3-dev

on Debian/Ubuntu the package it's called libssl-dev

1. aptitude install libssl-dev libopenssl-ruby1.8
2. cd /ruby_install_dir/ext/openssl
3. make
4. make install

afeicool@localhost:~$ gem install rails
ERROR: Loading command: install (LoadError)
no such file to load -- zlib
ERROR: While executing gem ... (NameError)
uninitialized constant Gem::Commands::InstallCommand

解决方案：

apt-get install zlib-bin zlib1g-dev
cd path/to/your ruby source dir/ext/zlib
ruby extconf.rb –with-zlib-include=/usr/include –with-zlib-lib=/usr/lib
make
make install