Flush DNS cache on mac

Flush DNS cache on mac:

#dscacheutil -flushcache

how to change the multiple file extensions at once

example:

sh-3.2# find ./ -type f -exec mv {} {}.pcap \;

快速設定網路 on windows - use netsh command

最近常常需要在不同電腦上設定不同的網路, 每次都要開控制台又要進到網路連線設定按一堆鍵, 久了實在是覺得很沒有效率, 為了改善此一現狀, 可以使用netsh 這個windows內建的指令來做設定.

1. 首先使用管理者權限開啟CMD

2. 輸入下列指令設定本機IP與DNS server:

[以下只是範例 exmaple]
netsh interface ip set address "區域連線" static 192.168.0.1 255.255.255.0 192.168.0.254 1
netsh interface ip set dns "區域連線" static 8.8.8.8

3. 完成

Show iptable rules with interface info

#iptables -L -v


and see the "in" "out" column


If you only want to see the iptable rules with certain interface,
use some thing like iptables -L -v | grep eht0.

replace localhost CNAME : Proxy debugging tool [CNAME]

http://www.charlesproxy.com/download/latest-release/download.do

筆電當AP , turn your windows 7 laptop into a Wi-Fi Hotspot

1. 進入命令提示字元 (用管理者權限開啟) - enter cmd

>netsh wlan set hostednetwork mode=allow ssid=NAME key=PASSWORD

2.

>netsh wlan start hostednetwork


3. 進入控制台中的網路介面設定, 在剛剛新增的連線 -> 右鍵 -> 內容 -> 共用

勾選 允許其他網路使用者透過這台電腦的網際網路連線來連線

不勾選 允許其他網路使用者來控制或停用網際網路連線共用



完成 :D

HLS (for iphone, ipad streaming service) server 架設

1. Download AVC streamer :

http://www.geardownload.com/d.php?id=69428&url=http://files.geardownload.com/3a54e-ff8ed/dl012/avcstreamer_win32_v0.02-alpha.zip

2. unzip

3. modify  /etc/avcserver.conf

{


# listen=[local HTTP server ip address]:[port]
# listen=127.0.0.1:8080
listen=127.0.0.1:8080
#modify to your own server IP or domain name

# media=[ media library dir ]
# This is the root directory of all your stored video files
# media=
media=/videos
#modify to the directory you want to put video files in

# home=[ AVCstreamer home dir ]
# Default value is automatically discovered based on invocation path
# home=
home=../
#root path


}

4. run

清空DNS快取 [windows]

> ipconfig /flushdns

這個指令目前個人是常用於 更新某個domain name 所要對應到的IP

example: 我已經在 hosts file 裡面設定 www.yahoo.com.tw 對應到的IP 是我自己架設server之IP, 這時候由於之前我已經問過DNS server about the www.yahoo.com.tw 的 IP, 所以要先清空這筆DNS快取內的old record.

win7 下 hosts file path :   C:\Windows\System32\drivers\etc\hosts

VIM設定檔 [sharing]

Write the following in the .vimrc :


set cindent
set enc=taiwan
set encoding=utf-8
set hls
set nocompatible
set sw=2
highlight Comment ctermfg=darkcyan
highlight Search term=reverse ctermbg=4 ctermfg=7
set autoindent
set ai
set cin
set ru
set showcmd
set bs=2
set ts=4
syntax on
set background=dark
set t_Co=256
set number
filetype plugin on

screen 設定檔 [sharing]

Share for everyone:


write the following in the .screenrc


termcapinfo xterm 'hs:ts=\E]2;:fs=\007:ds=\E]2;screen\007'
termcapinfo xterm 'hs:ts=\E]0;:fs=\007:ds=\E]0;bash\007'
caption always "%{= wk} %{= KY} [%n]%t @ %H %{-} %= %{= KR} %l %{-} | %{= KG} %Y-%m-%d %{-} "
hardstatus  " %-Lw%{= Bw}louwang%n%f %t%{-}%+Lw %=| %0c:%s "
shelltitle '$ |bash'
defhstatus "\005t"

關閉 ubuntu 預設的自動鎖螢幕

System -> Preferences -> Screensaver to open the Screensaver Preferences" dialog box. Uncheck "Lock screen when screensaver is active" at the bottom of the dialog box.

關閉chrome 分頁的快捷鍵

今天分享給各位 如何快速關閉chrome 的分頁而不用用滑鼠去點 X

答案是: Ctrl + w

如果你的Capslock 已經換成Ctrl 了會覺得更好按喔

Change the LED in mouse

滑鼠拆開後的主體

開始解焊原本滑鼠的紅色LED

準備要換上的超級藍光LED

YES! 安裝完成 酷炫藍光射出

好像比原本紅光來的亮

裝上外殼後

工作站一覽

Install GlassFish on Linux

o. sudo apt-get update
o. sudo apt-get install sun-java6-jdk sun-java6-jre
o. add export JAVA_HOME="/usr/lib/jvm/java-6-sun-1.6.0.06" to ~/.bashrc
o. download glassfish for linux from glassfish official website
o. sh glassfish-3.0.1-unix.sh
o. cd ~/glassfishv3/glassfish/bin
o. ./startserv #start glassfish

大量取代檔案中的關鍵字

這裡我所用到的case是我在許多網頁檔案中都有我blog的連結, 但是現在我domain name改了, 所以如果要一個一個檔案開檔然後修改就很麻煩, 這裡記錄快速方法:


grep 'keyword' * | sed 's/original_domain/new_domain/g'


keyword: 你想要找的關鍵字
original_domain: 要被取代的字串 (ex: IP address, domain name, parameter)
new_domain: 要填上的字串


如果要直接修改檔案的話請用 sed -i 's/A/B/g' file.txt.

在Linux下大量改變副檔名

雖然在linux之下副檔名並沒有什麼意義, 但是有時候為了辨識容易還是會用到.這裡提供一下在bash/C shell下如何大量改變副檔名

Bourne Shell:

for f in *.foo; do
 base=`basename $f .foo`
 mv $f $base.bar
done

C Shell:

foreach f ( *.foo )
 mv $f $f:r.bar
end

如何在cmd之下大量改變檔案之副檔名

example
rename *.txt *.c

vi 編輯完檔案 發現忘記按sudo編輯 之 解決方法

:w !sudo tee %

有時候沒有注意編輯檔案的權限, 等到全部編輯完才發現忘記打sudo,

我可不想跳出去再重新編輯一次, 這時候在vi 指令模式下用以上指令即可儲存.

在eeebox b202, FreeBSD 8.0 release 安裝 wireless card driver

This is the process to setup eeebox's wireless driver on FreeBSD:
The eeebox's wireless chip is rt2860 made by the company - ralink.

method 1(WARNING: this method is NOT success in my trial):
convert windows driver for rt2860 to FreeBSD kernel module.
download windows version driver: rt2860.inf, rt2860.sys
put kernel module generated from ndisgen which is rt2860_sys.ko to /boot/modules
edit /boot/loader.conf add rt2860_sys_load="YES"

result -> fail -> the strange error message keep output to screen
"ndis0 if_input should not be called"

accidently find there are already a driver for rt2860 for FreeBSD 7.0 and 8.0 release
so I abandon method 1 and turn to method 2.

method 2 (SUCCESS): find the kernel module.
Surprisely, someone has write the rt2860/rt2870 driver for FreeBSD.
http://repo.or.cz/w/ralink_drivers/rt2860_fbsd8.git
use git clone links to download whole source code
make
cp rt2860.ko/ rt2860.ko.module to /boot/kernel
set rt2860_load="YES" in /boot/loader.conf
reboot system.

Loading rt2860.ko/rt2870.ko will create the hardware interface rt28600/rt28700 respectively but since version 8 of FreeBSD, these are not controlled directly for the usual settings but with a virtual interface that must created either manually like:

wlans_rt28600="wlan0"
ifconfig_wlan0="WPA DHCP"

network={
ssid="freebsdap" (ssid)
psk="freebsdmall" (password)
}
#/etc/rc.d/netif start # restart the network interface
SUCCEED!!

reference:
"FreeBSD wireless handbook" -
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/network-wireless.html

file path summary:
/boot/loader.conf -> setting which module to boot when starting the system.
/boot/defaults/loader.conf -> default modules to boot.
/boot/modules -> put the custom kernel modules .ko to here
/boot/kernels -> put your .ko .ko.symbols to here

快速移動游標 in console

快速移動游標 in console

ctrl+a -> 移到最前面 (= home)
ctrl+e -> 移到最後面 (= end)