一个在 Linux 终端中输出彩虹特效的命令行工具 -lolcat
1）下载ruby并安装
#wget http://www.mrliangqi.com/pack/ruby-2.1.4.tar.gz
#tar xf ruby-2.1.4.tar.gz
#./configure --prefix=/usr/local/ruby && make &&make install
安装完成之后修改系统的PATH路径：
# vim /etc/profile.d/ruby.sh
export PATH=/usr/local/ruby/bin:$PATH
# . /etc/profile.d/ruby.sh 使其生效
#ruby -v 查看安装好的ruby版本
2）下载安装rubygem
rubygems是ruby的在线包管理工具，类似yum和apt-get可以从rubyforge下载。
# wget www.mrliangqi.com/pack/rubygems-2.4.1.tgz
#tar xf rubygems-2.4.1.tgz
# ruby setup.rb 使用ruby命令进行安装
3）下载并安装lolcat
#wget http://www.mrliangqi.com/pack/master.zip
# unzip master.zip
# gem source --remove https://rubygems.org/
https://rubygems.org/ removed from sources
# gem sources -a https://ruby.taobao.org/
https://ruby.taobao.org/ added to sources
# gem sources -l
*** CURRENT SOURCES ***
https://ruby.taobao.org/
# gem install lolcat
4）测试
[root@Aliyun /]# ls -lh | lolcat
