ubuntu karmic manager services

Use package:
 sysv-rc-conf

Or
update-rc.d -f cron remove

Or


Disabling Services using BUM

bum is a package

so  use
apt-get install bum

how to diff two files of currently open in vim

:windo difft

mac terminal color highlighting

Enabling directory and file color highlighting requires that the file ~/.bachrc, ~/.profile, or ~/.bash_profile to be changed:

export CLICOLOR=1
 export LSCOLORS=ExFxCxDxBxegedabagacad

how to uninstall grub from linux

copied from somewhere. 

Using Linux

You can also use dd command from Linux itself (it removes partition table):
# dd if=/dev/null of=/dev/sdX bs=512 count=1

Just remove MBR, without the partition table (see comment below):
# dd if=/dev/null of=/dev/sdX bs=446 count=1

Replace /dev/hdX with your actual device name such as /dev/hda. Use fdisk -l command to find out device name:
# fdisk -l

a simple speed comparison of GSL and Rmath C libraries

Just use the functions in both libraries to generate normal random samples. 
It turns out that Rmath is faster for this simple computing.

build R on ubuntu

Both packages 'libxt-dev' and 'libx11-dev' or one of them are needed before building.


# apt-get insall libxt-dev libx11-dev
# configure
# make

Rmath example

The following is an example of code using stand alone R math library
and the compilation command.

/*
 *  C CODE
 */

#define MATHLIB_STANDALONE
#include <Rmath.h>
#include <stdio.h>
#include <stdlib.h>

int main(){
  int i;
  unsigned int SEED1, SEED2;
  double mu, sigma, PHI_X, *X;

  mu = 0;
  sigma = 1;
  SEED1 = 12345;
  SEED2 = 67890;
  set_seed(SEED1, SEED2);

  X = (double *) malloc(10 * sizeof(double));
  for(i = 0; i < 10; i++){
    X[i] = rnorm(mu, sigma);
    PHI_X = pnorm(X[i], mu, sigma, 1, 0);
    printf("X: %f, PHI(X): %f\n", X[i], PHI_X);
  }
  free(X);
}



/*
 * COMPILATION:  gcc -I/Users/local/lib64/R/include -L/Users/local/lib64 -lRmath -lm tmp2.c
 */

tsc quit full screen on ubuntu

Re: How to exit Terminal Services fullscreen??

---

exit the full screen mode with Ctrl-Alt-Enter
annd close the window

ubuntu restart network (eth0 dhcp)

restart networking

/etc/init.d/networking  restart 

/etc/network/

# The primary network interface
auto eth0
iface eth0 inet dhcp
~                       

root@jqt-laptop:/etc/network# ls
 if-down.d  if-post-down.d  if-pre-up.d  if-up.d  interfaces  interfaces.bak-0
root@jqt-laptop:/etc/network# 
root@jqt-laptop:/etc/network# 

latex eps automatically converted to pdf

Copied from http://robjhyndman.com/researchtips/converting-eps-to-pdf/

\documentclass{article}
\usepackage{graphicx,epstopdf}
\begin{document}
 \includegraphics[width=\textwidth]{fig1}
\end{document}

ubuntu packages needed for me

==
necessary
------------------
texlive-fonts-recommended
texlive-latex-recommended
subversion
vim-gnome
terminator


==
optional
---------------------------------
 ubuntu-restricted-extras 

C Man pages in UBUNTU

manpages-posix-dev - for c headers
manpages-dev - for c functions

VIM: block editing

Use CTRL+V to enter the block editing mode.
For editing something like tables, that is sweet.

switch to debian

switched from ubuntu to Debian. Have to say that ubuntu is more end user friendly.
On debian,
I need to mount ntfs partition use
#mount -t ntfs-39 /dev/sda /mnt

And I need to use iceweasel, which is not support chinese by default,
I need to install a package.
# apt-get install iceweasel-l10n-zh-cn

modify debian console resolution

debian console resolution change


title        Debian GNU/Linux, kernel 2.6.26-2-amd64
root        (hd0,5)
kernel        /boot/vmlinuz-2.6.26-2-amd64 root=/dev/sda6 ro vga=0x303
initrd        /boot/initrd.img-2.6.26-2-amd64

http://en.wikipedia.org/wiki/VESA_BIOS_Extensions

mount ntfs partition in debian

mount ntfs in debian

#mount -t ntfs /dev/sda2  /mnt -o rw -o umask=000

Fwd: combining r plots,

http://www.statmethods.net/advgraphs/layout.html

Irregular layout

R operators

x + y
x - y
 x * y
x / y
 x ^ y
x %% y
 x %/% y

> 4 %% 2
 [1] 0
> 4 %% 2
 [1] 0
> 4 %/% 2
 [1] 2
> 5 %/% 2
 [1] 2

r: clear screen

# An R function to clear the screen on RGui:
cls <- function() {
if (.Platform$GUI[1] != "Rgui")
return(invisible(FALSE))
if (!require(rcom, quietly = TRUE)) # Not shown any way!
stop("Package rcom is required for 'cls()'")
wsh <- comCreateObject("Wscript.Shell")
if (is.null(wsh)) {
return(invisible(FALSE))
} else {
comInvoke(wsh, "SendKeys", "\014")
return(invisible(TRUE))
}
}
cls() # test

from http://onertipaday.blogspot.com/2007/05/how-to-clear-screen-in-r.html,
cool!

svnadmin --- create and load

svnadmin create my_repo
svnadmin load my_repo < my_dump_file