Use the following command to query a gem’s detail information with the gem name as the query condition:

This implementation comes from here. The code is:

“rvm(Ruby Version Manager)”是用于在一台机器上管理多个不同版本ruby实现的工具。这篇文章的内容主要参考了这里和[这里][rtrvm_url]。

之前我在机器上安装virtualbox都是直接执行apt-get命令即可：

1

sudo apt-get install virtualbox-ose

但是今天执行之后启动virtualbox发现有如下错误：

1

No suitable module for running kernel found

最近忽然发现使用vpn的时候，原来可以访问的国外网站都发生了timeout错误，如twitter和facebook，而访问国内网站都没有问题。

今天遇到一个令人发指的错误。

Run the following command to change the hostnames in the files:

1
2

sudo vi /etc/hostname
sudo vi /etc/hosts

Then restart the computer. The hostname should be the new one.

After I got a new Thinkpad T420 laptop, I installed Ubuntu 10.04 on it and then I found the network couldn’t work, and the display resolution was not right. Then I took some time to figure out the following solution.