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As everyone probably knows by now, Doom has been ported to Android.
This is exciting for two reasons,
1. It’s Doom!
2. It’s actually native code running with a Dalvik frontend.Now, Dalvik doesn’t have JNI, so how can you write something in C and run it?
This guy will lead you down a link-clicking rabbit hole that’ll tell you how. The important parts are the compiler (Choose ARM GNU/Linux and IA32 GNU/Linux), and the technique of running system commands from Dalvik, which is detailed on Gimite’s page.
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Why still Intrepid (Ubuntu 8.10) server? I just don’t have time to upgrade it. For a server, as long as it is secure and stable, no need for the cutting edge.
Why VPN? Check wiki. For me, I want to access some location sensitive files while I am on the iPhone via 3G network.
How? There is an excellent How-To in Chinese. I followed it and it works! This post is a summary of what I did.
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自从实验室放了台 Linux 服务器后，可玩的东西就越来越多了。虽然这台服务器主要的工作是 Web Server，但鉴于我们那小站压力非常之小，服务器资源绝大多数还是浪费着，所以让它多干些活是个不错的选择。实验室的内部网络中有不少非常有用的资源，例如科研用的文献资料，个人的实验数据等等，这些内容一旦离开实验室就不那么容易访问到了。解决这个问题最好的办法就是 VPN。在 Ubuntu 上搭建 VPN 服务器的方法非常多，比较著名的有 PPTP, L2TP/IPSec 和 OpenVPN。这三种方式中后两者的安全性比较好，但配置较麻烦。其中 OpenVPN 在 Windows/Mac 平台上还需要额外的客户端。而 L2TP/IPSec 方式虽然比较好，但我配置后，虽然 Windows 和 Linux 用户没有问题，但 Mac/iPhone 却始终无法连上，所以暂时删掉了，日后搞清楚是什么问题再换到这种方式。