where are mysql data files located on file system on CentOS

/var/lib/mysql

packages needed for centOS guest in virtualbox

yum install gcc kernel sources kernel-devel

linux lvm

lvreduce -L 1G /dev/oracle/ora_data
lvextend -L 10G /dev/oracle/ora_data

intellij live templates keyboard shortcuts

http://www.jetbrains.com/idea/features/code_assistance.html#Live_Templates

CentOS 5.5 64bit as a guest on Virtualbox

CentOS 5.5 64bit failed to install as a guest on VirtualBox. It pauses with "NET: Registered protocol family 2" before the installer even starts. The 32bit version installed fine however.

To get the 64 bit version to install as a guest on VirtualBox (redhat 64bit profile), I had to enable IO APIC under System|Motherboard

sqlserver authentication

sa account disable by default for security reason. to enable it http://technet.microsoft.com/en-us/library/ms188670.aspx

nexus one usb debugging on ubuntu 10.04

google's direction at http://developer.android.com/guide/developing/device.html did not work.

with nexus one plugged in, run
% lsusb

Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 005: ID 413c:8156 Dell Computer Corp. Wireless 370 Bluetooth Mini-card
Bus 003 Device 004: ID 413c:8158 Dell Computer Corp. Integrated Touchpad / Trackstick
Bus 003 Device 003: ID 413c:8157 Dell Computer Corp. Integrated Keyboard
Bus 003 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 002: ID 0c45:63fa Microdia
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 032: ID 18d1:4e12
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

vendor id is 18d1 for the nexus one

also make sure permissions of 51-android.rules is rx not just r as in the google documentation
% chmod a+rx 51-android.rules

accessing service from grails console

given a service name FooService, to access it within the grails console:
ctx.fooService

vncserver vncviewer keyboard mapping messed up on ubuntu 9.10

this fixes it
gconftool --set /desktop/gnome/peripherals/keyboard/kbd/layouts --type List --list-type String [aa]

rsync for remote backups


rsync -avz -e ssh /dir/ remote_user@remotehost.com:/dir/


windows command line

shutdown -s -t 01

import java.awt.image.BufferedImage
import java.awt.Graphics
import javax.imageio.ImageIO

def colorImage = ImageIO.read(new File(args[0]))

BufferedImage greyImage = new BufferedImage(1280, 853, BufferedImage.TYPE_BYTE_GRAY);
Graphics g = greyImage.getGraphics();
g.drawImage(colorImage, 0, 0, null);
g.dispose();

File file = new File("saved.png");
ImageIO.write(greyImage, "png", file);

zoom usb modem on ubuntu 9.10

download and run the installer
http://www.linuxant.com/drivers/dgc/downloads-installer.php