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Blog of Roy Chan

GNU/Linux HSDPA (3.5G) 上網!?

早一陣子,有人問我 GNU/Linux 可不可以 HSDRA (3.5G) 上網。現在香港 HSDPA 計畫都頗貴,我沒有錢使用,所以亦答不到。不過研究一下亦無況。

Google 搜索一下,Tuxmobil 有一專頁收集了有過 GNU/Linux 3G 上網的資料。似乎上 Smartone-Vodafone 最新那個 HSDPA USB stick 有 GNU/Linux 驅動器,有 Debian、Fedora 8 和 OpenSuSE 10.3 等 distro 的套件預備。但見討論區有不少人投訴驅動器有問題。

有機會要找個有 Smartone-Vodafone USB stick 的朋友備來試試。

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加快 Notebook 啟動 Ubuntu 速度: 取消開機自動啟動網絡


在 Notebook 啟動 Ubuntu 一般都會很慢。因為 Ubuntu 的圖像開機畫面令人看不到那裡出現問題。按 Alt-Ctrl-F8 就可以發現原兇。問題在於 Notebook 多會使用無線網絡,而開機時一般都還未連上無線網絡或插上網線。而和一般 GNU/Linux 一樣, Ubuntu 開機會自動啟動網絡。當 /etc/init.d/networking 未能找到網絡,自動需要等 timeout 才宣告啟動網絡失敗和繼續下一步。這一下 timeout 要浪廢十多二十秒的時間。

反正現時的網絡連接都交由 Network Manager 管理,我何大可以 rm /etc/rcS.d/S40networking 以取消開機自動啟動網絡,侍登入帳戶後, Network Manager 自動會動連幫我們連接網絡。

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WiFi on car! 這好像點在匪疑所思,不過早前美國密芝根州的一名市民就因在其坐駕上「盜」用附近一間咖啡廳的免費無線網絡而被起訴。

美國密芝根州的Sam Peterson習慣每天都駕車經過Union Street Cafe鄰近並使用其免費無線網絡收發電郵。他的「古怪」習慣行為引起了一位警員的疑心並上前查問。Peterson當時並沒有意會到其行在道德上有問題而照直說出原因。結果Peterson就因此而被捕,並以未經同意進入他人網絡罪被起訴。因為Union Stree Cafe的免費無線網絡只是提供給其客人使用,而Peterson從未光顧或進入Cafe內。


除了Peterson外,Union Street Cafe的老板亦未有意識Peterson的行為是違法。拘捕Peterson的警員亦說當時只意識Peterson已觸犯某條法例但並不知是那條。不過事實上Peterson的案件並首宗例子,類似例子在美國而有不少個案。其中一宗,一名阿拉斯架的男子更在本年年頭在公共圖書館外使用其公開無線網絡玩遊戲而被捕。

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OpenClassRoom 的 transcript

這天和 SambaHK 的 Frankie 討論有關 OSWikiHK 事宜, Frankie 提到因為收到一些國內同胞的要求,他想將 OpenClassRoom 的錄像重新灌錄一個普通話版本的聲帶,但因太忙,一直沒有時間做。當時我建議他可以考慮開一個小專案組織一些人去把有關錄像的言詞寫下來。這一來,做抄寫工作的人的技術要求不需要太高,可以把工作分出去給別人做,減輕他的工作負擔。另一方面,也算是增加多點有關文件,並吸納多此香港開源協力者。

因為時間緊急,我們還未有時間討論具體細節。考慮到 OpenClassRoom 現時的內容已開始不建基於 Debian ,如果成為 DebianHK 及 SambaHK 共同專案會有人反對。所以還要待我有時間才細想其他細節。現時 Frankie 主要想儘快做好由《Samba 下的 Access Control List 的理念》到最近的錄像的普通話版本,且看誰先有時間。

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Sunday wirless (wifi) broadband

Wow, just got an adv SMS from Sunday. They start to offer wireless broadband services in HK. HK$50/month for unlimited access!! Most AP located in KFC now. Bandwidth is 6Mbps for download and 650kbps for upload, not fast but seem enough!

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My home IPMasq box

Finally, I have reinstall my home IPMasq box to Debian Sarge. (It is a Mandrake previously, while once a upon of time I want to try Mandrake 7.x for teaching and haven’t time to upgrade it for years) Alas that it is a pretty old box (AMD K6, bought in 1999) and I haven’t touch it physically for long time, the CD-ROM drive is dirty and fail to boot any Debian Installer within my finger except the BBC Linux 2.1. Therefore, I decided to install the sarge via debootstrap. It is interest and great. May be I would write some article about it later. Beside, I found galternatives enter Sid yesterday, it’s also the time for me to write something about update-alternatives.

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Linux 2.6.5 and 2.6.6

Besides stardict, I spend sometime on reading the new feature Linux 2.6.6 on 14th night. It seems that 2.6.6 got some interesting thing like “laptop-mod” and CFQ and worth to have a try.

As I have mention, my HDD was damage and I have to re-install everything these few weeks, including kernel 2.6. I haven’t backup my Linux 2.6.x .config before the HDD damage. It spent me several hours to re-select the suitable configuration for my Thinkpad x30. This time, I decided to upload my configuration for backup and sharing even it is not prefect yet. If you also using the IBM Thinkpad x30, you can find my compiled Linux 2.6.5 here. It works with all my extra devices including:

  • Palm Tungstun T3
  • Truly MP3 Player MP378
  • Buffalo PCMCIA Wireless LAN WLI-PCM-L11
  • EagleTec CF 5in1 card reader

I keep using APM while I found the software suspend in 2.6.0 doesn’t work. The hibernation of Pheonix BIOS works ok before my HD damage but the notebook spend over 5 mins. to enter the GRUB screen everytime I switch on. It really freaked me out and thought the HD was damaged again. I don’t know why it stalled so long before booting and suspend it is caused by the wrong geometry location of the hibernation partition. But I’m sure it is not the Linux problem. I may need to relocate the partition or move to ACPI and try software suspend again.

No devfs support while it is obsoleted. I decided to try udev later.

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Interesting RFCs

Here is some interesting RFCs. Have u even think about IP over avian carriers? Sound like a joke. But it have been written as an RFCs 11 years ago (RFC 1149)and sound so serious that it got some futher RFC last year (RFC 2549). Last month, Bergen LUG even implement it.

More description can be found in:

even try to send data over space dusts . Athough this is neither an open protocol nor using IP, pretty interesting.

Many hackers like coffee, so we got Hyper Text Conffee Pot Control Protocol (RFC 2324).

Many people know spamming is the most annoying action on net. A new RFC (RFC 309 8) have released recently to educate those spammer. (Although, they will never read it.

The Y2K problem put many people in fears at 1999. Here we got an RFC talk (RFC 2550) about Y10K problem.

Have u heard Monkey typewriters theory before? Here is an RFC (RFC 2795) about it.

Another interesting RFCs, Roman Standards Process (RFC 2551) and Telnet Sublimital-message Option (RFC 1097).

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Based on Fluidity© 1998-2007 Roy Hiu-yeung Chan