Converting between tab and space in Emacs

Emacs: "M-x untabify" will ConvertTabsToSpaces in the region; "M-x tabify" will ConvertSpacesToTabs.

Tab width

M-x set-variable  tab-width 7

For this session, force Emacs to indent with spaces, never with TABs:

M-x set-variable indent-tabs-mode nil

http://www.student.northpark.edu/pemente/emacs_tabs.htm

Alan Kay: Doing with Images Makes Symbols

Alan Kay: Doing with Images Makes Symbols (1987)

part 1
http://www.archive.org/details/AlanKeyD1987

part2
http://www.archive.org/details/AlanKeyD1987_2

Windows Installer error 1601

Windows Installer error 1601 and msiexec.exe cannot be started

#
Start Windows Installer Service manually
Under Windows XP Professional
Control Panel -> Administrative Tools -> Services -> Windows Installer -> right click and choose "Start"

Under Windows XP Home
If XP Home doesn't have "Services" in its Control Panel, try typing "Services.msc" at the run or command

Try to install your desired program

#
Make sure that your system has up-to-date system files
start -> Run... -> cmd -> sfc /scannow

#
You may not have a right permission on your Windows XP as an administrator. Even though your account type appears as Computer Administrator in User Accounts under Control Panel, you may not have full permission of Computer Administrator. To have full control on Windows Installer, your account must be an administrator. To do that,

0. re-register Windows Installer Service

• start -> Run... -> cmd -> msiexec.exe /unregister
• msiexec.exe /regserver

1. open registry editor

start -> Run... -> regedit

2. Click the following registry hive: HKEY_CLASSES_ROOT
3. On the Edit menu, click Permissions
4. Change your account type to be an administrator

Click Advanced button -> Select Owner tab -> double click your account name to get ownership on your computer -> OK -> Apply

5. cmd -> Services.msc -> Windows Installer -> Properties -> "Log On" tab -> check "allow service to interact with desktop" -> "General" tab -> Change "startup type" to automatic -> ok


5. Restart the computer

6. If SYSTEM is not listed in the Group or user names list,

• click Add, make sure that the local computer name appears in the From this location box
• -> type system in the Enter the object names to select box, click Check Names, and then click OK
• -> click SYSTEM in the Group or user names list
• -> select the Full Control check box under allow in the Permissions for SYSTEM box
• -> Apply,
• -> OK
• -> quit Registry Editor
• -> Restart the computer

Reference: http://www.annoyances.org/exec/forum/winxp/1059790283

Linux UVC Installation

Linux UVC for my web cam

1. install subversion to download UVC source codes

$ sudo apt-get install subversion

2. download UVC sources

$ svn checkout svn://svn.berlios.de/linux-uvc/linux-uvc/trunk

3. before compile the sources

$ sudo apt-get build-essential
$ sudo apt-get kernel-headers

4. go to the Linux UVC directory

$ cd trunk

5. open the Make file in this directory

$ sudo make

6. open Makefile

$ vi Makefile
INSTALL_MOD_DIR := usb/media
to
INSTALL_MOD_DIR := kernel/ubuntu/media/usbvideo

7. make

$ make

8. install

$ sudo make install

Reference:
http://openfacts.berlios.de/index-en.phtml?title=Linux+UVC

The Power of 48 Minutes

Install Timer Applet on Ubuntu 7.04

$ sudo apt-get install timer-applet

Some nice voice alarms here, http://www.voco.uk.com

References: http://kldp.org/node/84516
http://successbeginstoday.org/wordpress/2006/09/the-power-of-48-minutes

My Learning Style

The results of Hwal Kim's learning inventory are:

Visual/Nonverbal 24 Visual/Verbal 24 Auditory 10 Kinesthetic 32

Your primary learning style is:

The Tactile/ Kinesthetic Learning Style

You learn best when physically engaged in a "hands on" activity. In the classroom, you benefit from a lab setting where you can manipulate materials to learn new information. You learn best when you can be physically active in the learning environment. You benefit from instructors who encourage in-class demonstrations, "hands on" student learning experiences, and field work outside the classroom.

Strategies for the Tactile/ Kinesthetic Learner:

To help you stay focused on class lecture, sit near the front of the room and take notes throughout the class period. Don't worry about correct spelling or writing in complete sentences. Jot down key words and draw pictures or make charts to help you remember the information you are hearing.

When studying, walk back and forth with textbook, notes, or flashcards in hand and read the information out loud.

Think of ways to make your learning tangible, i.e. something you can put your hands on. For example, make a model that illustrates a key concept. Spend extra time in a lab setting to learn an important procedure. Spend time in the field (e.g. a museum, historical site, or job site) to gain first-hand experience of your subject matter.

To learn a sequence of steps, make 3'x 5' flashcards for each step. Arrange the cards on a table top to represent the correct sequence. Put words, symbols, or pictures on your flashcards -- anything that helps you remember the information. Use highlighter pens in contrasting colors to emphasize important points. Limit the amount of information per card to aid recall. Practice putting the cards in order until the sequence becomes automatic.

When reviewing new information, copy key points onto a chalkboard, easel board, or other large writing surface.

Make use of the computer to reinforce learning through the sense of touch. Using word processing software, copy essential information from your notes and textbook. Use graphics, tables, and spreadsheets to further organize material that must be learned.

Listen to audio tapes on a Walkman tape player while exercising. Make your own tapes containing important course information.

Web Version of the Learning Styles Survey © Copyright 2000 by Suzanne Miller, Instructor
Contact me via: smiller@dvc.edu or or phone: (510) 685-1230 ext 830 or fax: (510) 687-2557
Diablo Valley College 321 Golf Club Road, Pleasant Hill, CA 94523
latest update October 25, 2000.

Reference: http://www.metamath.com/lsweb/dvclearn.htm

Speed up firefox on Ubuntu

about:config

1. network.http.pipelining -> true
2. network.http.pipelining.maxrequests -> 8
3. network.http.proxy.pipelining -> true
4. network.dns.disableIPv6 -> true
5. plugin.expose_full_path -> true
6. Right click -> New -> Integer: nglayout.initialpaint.delay -> 0
7. Right click -> New -> Integer: content.notify.backoffcount -> 5
8. Right click -> New -> Boolean: content.notify.ontimer -> true
9. Right click -> New -> Integer: ui.submenuDelay -> 0
10. layout.spellcheckDefault -> 2
11. Right click -> New -> Integer: browser.cache.memory.capacity -> 16384
12. Right click -> New -> Integer: content.maxtextrun -> 5000
13. add-on : fasterfox

References:
http://www.ubuntugeek.com/speed-up-firefox-web-browser.html
http://fasterfox.mozdev.org
http://kb.mozillazine.org

Install K3B MAD MP3 codec on Ubuntu

It's very simple now.
Ubuntu 7.04 Feisty

Install K3B MAD MP3 Codec

$ sudo apt-get install libk3b2-mp3

Emulating the XO/Quick Start/Linux

Debian/Ubuntu/Fedora/...

1 - Unpack the image

bzcat olpc-redhat-stream-development-ext3.img.bz2 > laptop.img

2 - Obtain qemu

On Debian/Ubuntu, as root:

apt-get install qemu

On Fedora, as root:

yum install qemu

3 - Run qemu on the image

qemu -soundhw es1370 -serial `tty` -hda laptop.img 

Then see Running for the first time.

4 - (optional, but recommended) Make qemu run faster

If you have an x86 or x86_64 cpu, you can use kqemu to speed up the emulation several 100%.

4 a - Obtain kqemu

On Debian/Ubuntu, as root, do one of:

apt-get install kqemu-modules-2.6-486    # if you have a 486/original Pentium
apt-get install kqemu-modules-2.6-686    # if you have a later Pentium
apt-get install kqemu-modules-2.6-k7     # if you have a 32-bit AMD Duron/Athlon/AthlonXP

Then

apt-get install kqemu-common

to add docs and have it auto-load at boot time.

In Ubuntu 7.04, you'll have to use module-assistant to compile kqemu.

Install the program:

sudo apt-get install module-assistant

Download the kernel headers:

sudo module-assistant prepare kqemu

Download, compile and install the kqemu module package:

sudo module-assistant auto-install kqemu

Due to an open bug in ubuntu's kqemu-source package, you'll need to do the following as well:

sudo nano /etc/modprobe.d/kqemu

Change the contents to be:

options kqemu major=0

Save the file and exit nano. Then do:

sudo nano /etc/udev/rules.d/60-kqemu.rules

Enter this text into the empty file:

KERNEL=="kqemu", NAME="%k", MODE="0666"

Save the file and exit nano.

On Fedora x86,

XXX please fill this in if you know

On Fedora x86_64,

as of 2007-05-13, there are no official rpms for kqemu, or the kqemu kernel module, and they are not included in the qemu rpm. atrpms.net has kqemu rpms. Or install from source.

I was successful using kqemu-1.3.0-2.fc6.i386.rpm and kqemu-kmdl-2.6.20-1.2962.fc6-1.3.0-2.fc6.x86_64.rpm from atrpms on fc6. 2962 is the kernel version (eg, ls /boot/). MitchellNCharity 19:40, 1 July 2007 (EDT)

4 b - Run modprobe

/sbin/modprobe kqemu major=0

This will need to be run again if the host computer is rebooted (unless noted above). If you forget, qemu will be slow again (and a one-line error message scroll by when you run qemu).

4 c - Run a qemu variant with the -kernel-kqemu option

On x86,

qemu -kernel-kqemu ...

On x86_64,

qemu-system-x86_64 -kernel-kqemu ...

If you forget and use just qemu instead, things will be slow again.

Reference: http://wiki.laptop.org/go/Emulating_the_XO/Quick_Start/Linux

시간을 정복한 남자, 류비셰프

Switch Caps Lock to Ctrl

On Windows XP Professional
It's actually not switch but swap Caps Lock key with Control key on a Windows XP professional version.

1. start -> Run -> regedit
2. Find the Keyboard Layout directory where is in
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Keyboard Layout
3. Click on Edit->New->Binary Value
4. Name it "Scancode Map" without the quotes
5. Right click -> Modify
6. Input the values below
00,00,00,00,00,00,00,00,
03,00,00,00,1d,00,3a,00,
3a,00,1d,00,00,00,00,00

Reference: http://www.usnetizen.com/fix_capslock.html

On Ubuntu 7.04 Feisty
1. create .Xmodmap file in your home directory

$ vi ~/.Xmodmap

2. write down below

! Switch caps lock and left control
remove Lock = Caps_Lock
remove Control = Control_L
keysym Control_L = Caps_Lock
keysym Caps_Lock = Control_L
add Lock = Caps_Lock
add Control = Control_L

3. load .Xmodmap file

$ xmodmap ~/.Xmodmap

4. next time you log in to your Gnome, it will detect .Xmodmap file automatically. Thus, next steps are not really necessary.

If ~/.xinitrc doesn't exist
$ cp /etc/X11/xinit/xinitrc ~/.xinitrc

In all cases
$ vi ~/.xinitrc
in the first line,
xmodmap ~/.Xmodmap

References:
http://ubuntuguide.org/wiki/Ubuntu:Feisty#How_to_remap_the_Caps_Lock_key_as_another_Control_key
http://dinomite.net/archives/caps-lock-to-control-on-ubuntu

External Hard Drive Install, Making a File System in Linux

// report file system disk usages
$ df

// low level format, fulfill with zero
# dd if=/dev/zero of=/dev/sdb1

// create or delete the partition
# fdisk /dev/sdb
or # cfdisk /dev/sdb

Remain in fdisk and do the following:
a. You need to add a new partition so type n
b. Make it a primary. Press p
c. Make it the 1st partition. Press 1
d. Use the defaults to create one big hard disk. Press enter twice
e. You need to change the partition's system id so type t
f. To see the list of codes type L
g. To select vfat, W95 Ext'd (LBA), press c
h. Now write the changes to disk. Press w

// Create the file system.
# mkfs.vfat -F 32 -n VolumeName /dev/sdb1

My Lovely Family

This picture was took in the private room of my parents on July 10, 2007, the day before I came back to California. I don't know when my family can get together again. My brother, who is a chef, got a job in a Japanese restaurant in Australia, so he's going to leave with his wife on July 19, 2007. My father told me, one day, "I feel like becoming an orphan." Of course, my brother and me are not his parents. It was just an emotion that he felt when he was told that my brother made a decision to go to Australia.

When my international family get together next time, I wish that there would be one more person in the picture. :-)