雪夜读书
Friday, June 12, 2015
dnsmasq doesn't play well with OpenBSD
Try to pxeboot install OpenBSD, and was surprised to find I can not use dnsmasq. dnsmasq is the right thing to do this work, it is simple, it is compact, it has dhcp/dns/tftp integrated in one and is the perfect choice for pxe install, except for OpenBSD.
OpenBSD's pxeboot requires reverse arp, and check this out:
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2007q1/001185.html
Sigh!
OpenBSD's pxeboot requires reverse arp, and check this out:
http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2007q1/001185.html
Sigh!
Sunday, October 26, 2014
Boox M96测评
用这货也已经一个月了，现在总算有点心得了，也可以写点有用的东西了。
总体评价，这货是个半成品，远没有到能出货的程度。东西的概念还可以，但是软件粗糙地很，很多功能用起来非常累。
第一是没有触摸屏，所以人家很贴心地给了你一个电磁笔，为了怕你把电磁笔给丢了，人家再很贴心地给了你一个套子。结果这个套子比电子书都重。拿在手上跟那一个ipad也差不了多少了。哦，还有一点忘了，你哪天如果丢了这支电磁笔，上哪里配都不知道。为什么不搞一个触摸屏？难道是要控制成本？
没有触摸屏是所有问题的根源。Android的App形形色色，要想用区区几个按钮来模拟这些App的操作，实在是一件不可能的事情，而且各个App自行其是，弄得这些按钮在各个App之间的行为大相径庭，弄到最后，还得用电磁笔。于是这些按钮就显得非常的多余。
第二是wifi被定义成自动断。wifi呀，我自己的东西，不要钱的，你弄得经常断干吗？要保护电池吗？1700毫安，手机也不过如此，这个电量用个两三天不成问题，你阅读器自动休眠的时候再断wifi难道不可以吗？你知道人家为什么要买你的阅读器？不就是因为是Android吗？你弄个wifi定时休克我怎么用？
第三是内置软件粗糙不堪。机器自带的几个软件在读epub的时候，居然没有办法显示目录。启动FBReader，却被告知某个目录没有写权限。本以为中文的阅读器会多给几个字体，结果拿到手一看，只有最丑陋的default，要宋体还得自己安装。最可气的是，安装了Adobe Acrobat Reader，居然每次打开pdf文件的时候，程序都崩溃。我装这个App就是为了读pdf，你不开pdf它不崩溃，你一开他就崩溃。你们出货的时候到底测试过没有？
最后一点让我不爽的是在看kindle的时候，只能用电磁笔换页。理论上屏幕右边那个按钮也可以换页，但是你真的用这个按钮的话，10次里面有8次，它一下子翻过去两页。于是你得翻过来再试。这种阅读体验真的是没得说了。于是最后还得拿起电磁笔。你们想过读者躺在床上，窝在沙发里，一手拿着电子书，一手拿着电磁笔是个什么状态吗？
现在是非常后悔买了这个东西。
总体评价，这货是个半成品，远没有到能出货的程度。东西的概念还可以，但是软件粗糙地很，很多功能用起来非常累。
第一是没有触摸屏，所以人家很贴心地给了你一个电磁笔，为了怕你把电磁笔给丢了，人家再很贴心地给了你一个套子。结果这个套子比电子书都重。拿在手上跟那一个ipad也差不了多少了。哦，还有一点忘了，你哪天如果丢了这支电磁笔，上哪里配都不知道。为什么不搞一个触摸屏？难道是要控制成本？
没有触摸屏是所有问题的根源。Android的App形形色色，要想用区区几个按钮来模拟这些App的操作，实在是一件不可能的事情，而且各个App自行其是，弄得这些按钮在各个App之间的行为大相径庭，弄到最后，还得用电磁笔。于是这些按钮就显得非常的多余。
第二是wifi被定义成自动断。wifi呀，我自己的东西，不要钱的，你弄得经常断干吗？要保护电池吗？1700毫安，手机也不过如此，这个电量用个两三天不成问题，你阅读器自动休眠的时候再断wifi难道不可以吗？你知道人家为什么要买你的阅读器？不就是因为是Android吗？你弄个wifi定时休克我怎么用？
第三是内置软件粗糙不堪。机器自带的几个软件在读epub的时候，居然没有办法显示目录。启动FBReader，却被告知某个目录没有写权限。本以为中文的阅读器会多给几个字体，结果拿到手一看，只有最丑陋的default，要宋体还得自己安装。最可气的是，安装了Adobe Acrobat Reader，居然每次打开pdf文件的时候，程序都崩溃。我装这个App就是为了读pdf，你不开pdf它不崩溃，你一开他就崩溃。你们出货的时候到底测试过没有？
最后一点让我不爽的是在看kindle的时候，只能用电磁笔换页。理论上屏幕右边那个按钮也可以换页，但是你真的用这个按钮的话，10次里面有8次，它一下子翻过去两页。于是你得翻过来再试。这种阅读体验真的是没得说了。于是最后还得拿起电磁笔。你们想过读者躺在床上，窝在沙发里，一手拿着电子书，一手拿着电磁笔是个什么状态吗？
现在是非常后悔买了这个东西。
Friday, December 27, 2013
Windows 8 sucks, recap
This time it is the narrator. I don't know how I triggered it, but I turned it on by accident. Then the problem starts. How can I stop it, or even better, how can I disable it?
The first challenge, you guess, is to find out the Microsoft lingo for this "feature". After searching on the Internet for 15 minutes, I got the magic word: "Narrator".
OK, then the second job is to disable it. Not too bad, Windows Key + Enter. But how to disable this feature? I am surprised to find that actually you can not. Someone suggests to shut off the executable bit of the binary. But dude, this is not a fix, it's a hack!
I was wondering why this time Microsoft choose to use hot key? Why not give us a small icon in the systray, and you can turn it on and off using this icon, just like managing input method.
I can not help thinking:
In a serious business show, someone turned on his laptop and try to give the presentation. But somehow he turned on this "feature", then everytime when he click a key or move the mouse, a expressionless voice interrupted him. He tries to turn off this "feature", but just like me, he didn't know how the MS guys call this feature. And after a furious and frustrating 15 minutes, his time is up.
The first challenge, you guess, is to find out the Microsoft lingo for this "feature". After searching on the Internet for 15 minutes, I got the magic word: "Narrator".
OK, then the second job is to disable it. Not too bad, Windows Key + Enter. But how to disable this feature? I am surprised to find that actually you can not. Someone suggests to shut off the executable bit of the binary. But dude, this is not a fix, it's a hack!
I was wondering why this time Microsoft choose to use hot key? Why not give us a small icon in the systray, and you can turn it on and off using this icon, just like managing input method.
I can not help thinking:
In a serious business show, someone turned on his laptop and try to give the presentation. But somehow he turned on this "feature", then everytime when he click a key or move the mouse, a expressionless voice interrupted him. He tries to turn off this "feature", but just like me, he didn't know how the MS guys call this feature. And after a furious and frustrating 15 minutes, his time is up.
Thursday, June 20, 2013
Windows 8 sucks
I have a D-Link DNS-320. Also I have a Windows 8 laptop. Both of them have been there for very long time, and they are not talking with each other, because I always use Linux. Then today I need to use Windows to access the files on the DNS-320 box.
Well, the story begins.
First, there's no start button in Windows 8. In the old days, what you want to do is just click the start button, and input \\hostname\sharename, and voila! But how am I going to do with Windows 8?
There is a File Exploder button (whatever you call it). And when you click it, it shows something. I say something, because I really don't understand what it really is. For example, under the "Homegroup" category, there's a user. What does that mean? What is "Homegroup"? I assume it is something like the workgroup name. Then in this case, shouldn't the sub-items be hostnames?
Actually after waisting 3 hours I finally figured out it is some quasi proprietary protocol. A combination of Bonjour, DNLA ..., which totally doesn't work for me.
Of course I search the Internet. There's plenty of tutorials, and all of them are not applicable. Basically what they say is, click the File exploder button, go to the Window that I am already at, and the server should readily appear under the "Network" category.
They are lying! Windows 8 can NEVER automatically discover my DNS-320 box. I will say that again. Windows 8 can *NEVER* find my nas box!
It is purely by chance that I finally find out how to configure it.
click "file exploder", scroll to "Network", right click it, click "Map network drive", there should be a dialogue. Then click the link which reads "connect to a Web site that you can use to store your documents and pictures". There should be a wizard come out. Click next, and fill the "Internet and network address"
OK, Microsoft, you really do a good job. What a fun of Windows 8. Tons of "Guess what I am thinking" quiz.
Well, the story begins.
First, there's no start button in Windows 8. In the old days, what you want to do is just click the start button, and input \\hostname\sharename, and voila! But how am I going to do with Windows 8?
There is a File Exploder button (whatever you call it). And when you click it, it shows something. I say something, because I really don't understand what it really is. For example, under the "Homegroup" category, there's a user. What does that mean? What is "Homegroup"? I assume it is something like the workgroup name. Then in this case, shouldn't the sub-items be hostnames?
Actually after waisting 3 hours I finally figured out it is some quasi proprietary protocol. A combination of Bonjour, DNLA ..., which totally doesn't work for me.
Of course I search the Internet. There's plenty of tutorials, and all of them are not applicable. Basically what they say is, click the File exploder button, go to the Window that I am already at, and the server should readily appear under the "Network" category.
They are lying! Windows 8 can NEVER automatically discover my DNS-320 box. I will say that again. Windows 8 can *NEVER* find my nas box!
It is purely by chance that I finally find out how to configure it.
click "file exploder", scroll to "Network", right click it, click "Map network drive", there should be a dialogue. Then click the link which reads "connect to a Web site that you can use to store your documents and pictures". There should be a wizard come out. Click next, and fill the "Internet and network address"
OK, Microsoft, you really do a good job. What a fun of Windows 8. Tons of "Guess what I am thinking" quiz.
Wednesday, June 19, 2013
typesetting manpage for 6 inch ebook reader
Find out the gz file for the man page, and run the command (here we took bash as example).
cat /usr/share/man/man1/bash.1.gz | gunzip - | groff -Tps -dpaper=b6l -P-pb6 -P-l -man | ps2pdf - /tmp/bash.man.pdf
The overall accessment about PowerShell
From my point, PowerShell is not a good product.
Shell, by definition, is something that glue the applications together. In the Unix world, if you follow the basic conventions, like deal with stdin, stdout, stderr, everything is string, exit code 0 stands for success ..., then you are OK. It doesn't matter whatever language, whatever library you are using. It will be very easy for the end users to call your code. And if other people also follow the same convention, it should be equally easy for you to call their code. However, PowerShell is totally different. Everything is .NET. The arguments, the return values, and even the invocation of the PowerShell commands are .NET stuff. So if you want to write some code that needs to talk with PowerShell, and the language or the library are not .NET ready, then you are screwed. In this way, Powershell is not a shell for the operating system, it is just a shell for .NET.
But MS has really done a great job. PS actually is pretty handy by its own. But the problem is, shell is not a something that mean to play by its own.
Wednesday, January 04, 2012
compile node.js on my DNS-320
The appliance is running chrooted squeeze. To build node, simply set several environments.
$ export TMPDIR=/tmp
$ export CC='gcc -march=armv5t -mfloat-abi=softfp -fno-tree-sink -O0'
$ export CCFLAGS='-march=armv5t -mfloat-abi=softfp -fno-tree-sink -O0'
$ export CXX='g++ -march=armv5t -mfloat-abi=softfp -fno-tree-sink -O0'
$ export GCC='-march=armv5t -mfloat-abi=softfp -fno-tree-sink -O0'
$ ./configure --prefix=/home/jhuang/.local/ --without-snapshot
And voila! It takes quite long to finish, but you know patience is meant to be used this way.
Monday, October 24, 2011
ubuntu sucks
I've been using Ubuntu since 606, and it used to be my favorite distribution, but now I want to say it sucks.
After upgrading to 11.10, I noticed that we don't have any choice but Unity. And the result is it is as slow as Vista. I launched gvim, which is my favourite editor. How laggy it is? You type a key, and it doesn't respond. After few seconds, the cursor begins to move down, and now what you want is to make it stop, and you can't. Do they also buffer your key stroke?
Ubuntu always bring us some funny bugs. And today I got one. cups-pdf doesn't have a backend. Then I check the package, and to my surprise dpkg tells me that cups-pdf doesn't have /usr/lib/cups/backend/cups-pdf any more.
I remember the Ubuntu #1 bug. There are too many people using Microsoft. But how they want to close this bug? Emulating Windows with Linux?
After upgrading to 11.10, I noticed that we don't have any choice but Unity. And the result is it is as slow as Vista. I launched gvim, which is my favourite editor. How laggy it is? You type a key, and it doesn't respond. After few seconds, the cursor begins to move down, and now what you want is to make it stop, and you can't. Do they also buffer your key stroke?
Ubuntu always bring us some funny bugs. And today I got one. cups-pdf doesn't have a backend. Then I check the package, and to my surprise dpkg tells me that cups-pdf doesn't have /usr/lib/cups/backend/cups-pdf any more.
I remember the Ubuntu #1 bug. There are too many people using Microsoft. But how they want to close this bug? Emulating Windows with Linux?
