2014-01-05

ZFS

Compression
  It can save space without performance impact.

Network File Sharing
NFS
  osx nfs mount

SMB


Snapshot and Clone

2012-02-28

NAT 設定

網路架構
                                                                  eth0
                                                                    |
                                                                    |
HINET -----  ADSL Modem ------ ppp0 ----- eth1 (192.168.200.1)
                                                                    |
                                                                    |
                                                                  eth2 (192.168.100.1)
                                                                         \-->  192.168.100.0/24

  • /etc/network/interfaces
   1:  ################################

   2:  # ADSL which bind to eth1

   3:  ################################

   4:  auto dsl-provider

   5:  iface dsl-provider inet ppp

   6:  pre-up /sbin/ifconfig eth1 up # line maintained by pppoeconf

   7:  provider dsl-provider

   8:   

   9:  auto eth1

  10:  iface eth1 inet static

  11:  address 192.168.200.200

  12:  netmask 255.255.255.0

  13:   

  14:  auto eth2

  15:  iface eth2 inet static

  16:  address 192.168.100.1

  17:  netmask 255.255.255.0






eth2 不確定是否需增加 gateway設定





  • iptables

iptable rule 參考 iptable.rule

需注意的是 EXTIF介面為ppp0



打開ip 分享功能似乎在debian下運作並不成功,因此獨立至rc.local執行:
iptables -t nat -A POSTROUTING -s $innet -o $EXTIF -j MASQUERADE





若需要debian風格的啟動設定,可安裝iptables-persistent套件,

執行 invoke.rc iptables-persistent save可以將目前的iptable rules保留至/etc/iptables-persistent/iprules.v4 or v6









2009-09-12

常見水瓶材質

編號

材質

說明

1

PET 寶特瓶(飽和多元酯)

不適合高溫或重複使用,超過40度會釋放有毒物質

2

HDPE 高密度聚乙烯

也不適合高溫或重複使用,超過60度會釋放有毒物質

3

PVC 聚氯乙烯

千萬別用這個(很多國家禁用),3號材質溫度超過六十度,會釋出戴奧辛致癌物

4

LDPE 低密度聚乙烯

也不適合高溫或重複使用,超過60度會釋放有毒物質

5

PP 聚丙烯(能耐100度以上的溫度)

穩定性高,最適合拿來當食品容器

6

PS 聚丙乙烯

耐熱度60-70度,裝熱飲料也會產生毒素

2009-09-08

Naim uniti

下一個目標
image
image




Specification
Frequency response:20Hz - 50 kHz
Signal to Noise Ratio:80dB
Power output:50WPC into 8Ω、90WPC into 4 Ω
Other outputs:Headphone 3.5mm jack
Analogue inputs:3.5mm socket on front、3*RCA、1*DIN with power to support Stageline phono stage
Digital Inputs: 5 SPDIF (2*optical, 2*coaxial, 1*3.5mm jack)
USB:Front panel socket
Other inputs:Ethernet and iPod (analogue)
RS232: Rear panel
Audio files supported
Internet radio (WMA, MP3 Streams, MMS)
Playlists (M3U, PLS)
MP3, AAC (up to 320 kbps, CBR/VBR)
Apple Lossless (from iPod)
Windows Media–formatted content (up to 320 kbps)
WAV, FLAC, OGG Vorbis
CD formats disc compatibility:Redbook and CD-R
Dimensions (H x W x D):87 x 432 x 314mm
Weight:11.3kg