Quick Generate Key-Binding Command in Emacs

We want to bind Ctrl+c m to man-follow. We can use the following 3 steps to generate key binding command just like this:

(global-set-key “^Cm” (quote man-follow))
We can put this command into .emacs file to make our life easier.

1. M-x global-set-key

press Ctrl-c m from keyboard, press return.

enter man-follow return.

2. M-x repeat-complex-command return.

Now (global-set-key “^Cm” (quote man-follow)) is displayed in mini buffer.

3.Ctrl-a Ctrl-k to copy it into kill ring then paste it into .emacs.

Remember! Don’t copy the string by mouse copy or Ctrl+Shift+c if you use emacs-nox because ^C is a single key! Copy it into clipboard will make it into “^ and C” which leads to an error.

Ubuntu Stardict With Sound And HTML Parser

The default installation of stardict do not support sound and HTML dicts.

you need to install stardict-plugin package and download WyabdcRealPeopleTTS . Put those sound files in /usr/share/WyabdcRealPeopleTTS then chenge stardict sound sitting-> command  from play to aplay

Enjoy

Ubuntu Samsung 933SN Dual Monitor Vartual Desktop ATI Configration

First, backup your /etc/X11/xorg.conf

Then, sudo dpkg-reconfigure xserver-xorg  This command reconfigures xorg.

Then, reboot the system. Your ubuntu should be able to recognize your monitor but not in right resolution

in system->Administration->Hardware Device. Select ati driver. Reboot again.

Make sure in your xorg.conf contains the following info

Section “Screen”
#add these three lines
SubSection “Display”

Virtual   2640 1568  #2640=1200+1340 1568=800+768 which is my two monitors resolution
EndSubSection

#———————————
Identifier “Default Screen”
Device     “Configured Video Device”
Monitor    “Configured Monitor”
DefaultDepth     24
EndSection

Reboot again. I spent 2+ hours to make everything right. Here is my xorg.conf file. I use default ubuntu ati driver.  It takes time, be patient

How much do you know about tar?

Tar could be one of most powerful and complex command which we need to use every day. Here some tips for tar

Find file and put them in to tar:

find ./ -name “*.jpg” | tar -cvf yourtar.tar -T -

or

tar -cvf yourtar.tar  `find *.c -print`

Bash Tip: Execute Command Inside Another Command

There is a way to embeded a command inside another command by using ` key. This key is on the left of 1 key

Example

tar -cvf aa.tar `find *.c -print`

This command finds all the *.c file and send it to aa.tar

Get Assembly Code Output From GCC

Sometime we want to know the assembly code output for piece of c code. We can use this following command to do this.

gcc -S c_file.c

then it generates a c_file.s which is the assembly code of c_file.c

Read it and have fun.

Ubuntu 8.04 Setup Opengl Development Environment

First make sure you have installed build-essential packages. Those packets ensure you to have a basic compile environment.

Then:

sudo apt-get install libglut3-dev

Ubuntu 8.04 don’t have man page for opengl. but you can find one here

http://emergent.unpythonic.net/01157053957

download the man page and put it proper directory (/usr/share/man/man3)

Currently, I don’t find any glut man pages available for ubuntu. You can read the online version. If you really need man pages for glut. You can get one from some rpm of gult. Take man page out of rpm and put them in man page directory.

here is the rpm you need

glut-devel-3.7-12 RPM for i386

Install alien command first.This command can convert rpm to deb, then

sudo alien glut-devel-3.7-12.i386.rpm

extract the new deb packet(not install) find the manpages in man3 directory. Copy all of them to /usr/share/man/man3 directory.

You installed opengl library, head files and manpages. It’s time to start your journey in opengl programming now!

Ubuntu 8.10 can not shutdown, freeze in alsa

Put:

ifconfig wlan0 down

at the beginning of stop in: /etc/init.d/alsa-utils

Chmod recursively in directory

Chmod recursively in directory

remove execute from files under aa directory. This is useful when you copy files from fat or ntfs.

find aa/ -type f -exec chmod -x {} \;

GNU screen scroll by PageUp and PageDown

Add this line in your .screenrc  Use shift+pageup/pagedown to scroll

termcapinfo xterm* ti@:te@