PANGDU

Disable ssh root direct login

2012-03-07T05:10:00.001-08:00

in /etc/ssh/sshd_config

/PermitRootLogin yes

change to

/PermitRootLogin no

then

/etc/init.d/ssh restart

linux check if two files are identical

2012-03-06T03:47:00.002-08:00

linux check if two files are identical

use md5sum to check if their hash are identical

debian, linux, what is my current I/O scheduler?

2012-03-06T02:08:00.003-08:00

debian, linux, what is my current I/O scheduler?

cat /sys/block/sda/queue/scheduler
cat /sys/block/sdb/queue/scheduler

difference between ubuntu server and ubuntu desktop

2012-03-06T02:02:00.001-08:00

what is the difference between Ubuntu server and Ubuntu desktop?

Kernel Differences:

The Server Edition uses the Deadline I/O scheduler instead of the CFQ scheduler used by the Desktop Edition.
Preemption is turned off in the Server Edition.
The timer interrupt is 100 Hz in the Server Edition and 250 Hz in the Desktop Edition.

convert ubuntu 10.04 desktop edition to ubuntu 10.04 server edition

2012-03-06T01:57:00.000-08:00

convert ubuntu 10.04 desktop edition to ubuntu 10.04 server edition

sudo apt-get update
sudo apt-get install linux-headers-server linux-image-server linux-server

debian apt-get install trac 0.12

2012-03-01T00:25:00.000-08:00

do this

sudo apt-get install trac

at this point you will install only trac 0.11

then download Trac-0.12.3.tar.gz

tar -xpzvvf Trac-0.12.3.tar.gz

cd Trac-0.12.3

sudo easy_install Genshi

sudo python ./setup.py install

then finally a successful build of trac 0.12 on debian 5.0/6.0

linux sudo become another user without password

2012-02-23T23:25:00.003-08:00

sudo su username

make exact duplicate directory for ftp users above DefaultRoot

2012-02-17T14:07:00.000-08:00

sudo mount --bind /var/www/somedir /home/someuser/somedir

debian dvd player apt-get

2012-02-11T16:03:00.001-08:00

apt-get install vlc libdvdcss2

ubuntu 404 Not Found [IP: 91.189.92.169 80]

2012-01-31T20:26:00.001-08:00

the ubuntu is no longer supported, so in /etc/apt/sources.list change http://us.archive.ubuntu.com/ubuntu/ to http://old-releases.ubuntu.com/ubuntu/

debian NO_PUBKEY AAFF4A5B336064B5

2012-01-23T21:56:00.000-08:00

error message:

W: GPG error: http://deb.opera.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AAFF4A5B336064B5

reason:
key is outdated

solution:
wget -O - http://deb.opera.com/archive.key | sudo apt-key add -

hp laserjet p1102w setup on debian 6

2012-01-06T19:29:00.000-08:00

hp laserjet p1102w setup on debian 6

commands:

wget http://prdownloads.sourceforge.net/hplip/hplip-3.11.12.run
sh hplip-3.11.12.run

then run hp-setup to download some additional software then you are good to go

firefx how to select column in table

2011-12-21T05:36:00.001-08:00

hold down ctrl key while select

firefox how to disable/block alert,confirm,prompt?

2011-11-14T20:07:00.001-08:00

find your prefs.js add 3 lines user_pref("capability.policy.default.Window.alert", "noAccess"); user_pref("capability.policy.default.Window.confirm", "noAccess"); user_pref("capability.policy.default.Window.prompt", "noAccess");

scim stopped working

2011-10-20T23:12:00.001-07:00

scim stopped working? try kill -9 all process of scim, then run this /usr/lib/scim-1.0/scim-launcher -d -c simple -e all -f socket --no-stay

To configure Exim4, run the following command

2011-10-08T19:24:00.001-07:00

sudo dpkg-reconfigure exim4-config

To install Exim4, run the following command

2011-10-08T19:23:00.001-07:00

sudo apt-get install exim4

ADB: error: insufficient permissions for device

2011-09-16T04:45:00.000-07:00

problem:

List of devices attached
???????????? no permissions

solution:

adb kill-server
sudo adb start-server
adb devices

create a partition shared by both Windows & Linux

2011-08-16T19:11:00.000-07:00

sudo apt-get install ntfs-config

vim move the current line to scrolltop of the screen

2011-08-16T19:05:00.000-07:00

move the current line to scrolltop
zt
move the current line to scrollbottom
zb

wordpress filters

2011-04-13T02:01:00.001-07:00

located in:
wp-includes/default-filters.php

linux reference a file start with a dash

2011-04-04T17:24:00.001-07:00

problem:

say you have a file, its name start with a dash, when you try to use command on that file, it will result in error,

solution:

use command ./-xxxxxxxxxxxxxxx instead of command -xxxxxxxxxxxxxxx

magento how to debug sql query

2011-03-30T19:44:00.001-07:00

edit this file: lib/varien/Db/Adapter/Pdo/Mysql.php

protected $_debug = true;
protected $_logAllQueries = true;
protected $_debugFile = 'var/debug/sql.txt';

magento import export cms pages

2011-03-22T16:26:00.000-07:00

mysqldump cms_page and cms_page_store tables

and restore to your destination database

mysql change root password

2011-03-14T23:14:00.001-07:00

mysqladmin -u root -p'abc' password '123456'