http://www.raspberrypi.org/phpBB3/

在磁盘中创建备份目录 mkdir /media/usbdisk/mactimebak 推荐使用ext4分区(打开notime)

安装nettalk

修改配置文件： sudo vim /etc/netatalk/AppleVolumes.default

配置如下

# The line below sets some DEFAULT, starting with Netatalk 2.1.
:DEFAULT: options:upriv,usedots
# By default all users have access to their home directories.
~/                      "Home Directory"
/media/usbdisk/mactimebak  "Time Machine" allow:pi cnidscheme:dbd options:usedots,upriv,tm

写在另外一个页面里了 [https://gist.github.com/kennyz/0afc809baabd8223fddf]

有时候需要远程连接到pi上去用samba编辑本地代码，这该死的samba又死活只支持局域网，逼得我连vpn进来。 当然在pi上搞个VPN服务，还是有很多好处的，你懂的。

步骤如下：

sudo modprobe ppp-compress-18

sudo vim /etc/pptpd.conf

localip 192.168.1.10
remoteip 192.168.1.234-238,192.168.1.245

sudo vim /etc/ppp/chap-secrets

vpnuser pptpd vpnpwd *

sudo vim /etc/ppp/pptpd-options 配置改为：

ms-dns 8.8.8.8
ms-dns 8.8.4.4
noipx
nodefaultroute
mtu 1396
mru 1396

/etc/sysctl.conf 修改 net.ipv4.ip_forward=1

打开防火墙 1723 端口

稍微有点复杂，慢慢写...

参考文章 Link

将Pi的负载和温度显示在你自己的网站上，愿意自己绘图的可以自己动手，像我一样懒的可以通过COSM的API实时接收数据并且画出精美的监控图片。 比如这样的：

send_data.sh 的代码如下：

cd /home/pi/bin/cosm/
sed 's/\([0-9]*\.[0-9][0-9]\) \([0-9]*\.[0-9][0-9]\) \([0-9]*\.[0-9][0-9]\)\(.*\)/{"datastreams":[ {"id":"5min","current_value":"\1"},{"id":"10min","current_value":"\2"},{"id":"15min","current_value":"\3"} ]}/' /proc/loadavg > cosm-load.json
curl --request PUT --data-binary @cosm-load.json --header "X-ApiKey: -APIKEY" http://api.cosm.com/v2/feeds/95397?timezone=+8

VAL=`cat /sys/class/thermal/thermal_zone0/temp`
STR=`awk 'BEGIN{printf "{\"datastreams\":[ {\"id\":\"temp\",\"current_value\":\"%.1f\"} ] } ",'$VAL'/1000}'`
echo $STR > cosm_temp.json
curl --request PUT --data-binary @cosm_temp.json --header "X-ApiKey: -APIKEY" http://api.cosm.com/v2/feeds/95397?timezone=+8

pi的源列表: http://www.raspbian.org/RaspbianMirrors

测试了之后发现这个源在国内更新最快

http://mirror.devunt.kr/raspbian/raspbian/

更换源:

sudo vi /etc/apt/sources.list

更换为以下代码： deb http://mirror.devunt.kr/raspbian/raspbian/ wheezy main contrib non-free rpi

外接磁盘绝对不能使用NTFS格式分区！速度非常慢

安装测试磁盘速度的软件： sudo apt-get install hdparm

测试本地card的读写速度：

hdparm -Tt /dev/mmcblk0

pi@raspberrypi ~/downloads $ sudo hdparm -Tt /dev/mmcblk0

/dev/mmcblk0:
 Timing cached reads: 210 MB in 2.02 seconds = 104.21 MB/sec
 Timing buffered disk reads: 54 MB in 3.09 seconds = 17.45 MB/sec
pi@raspberrypi ~/downloads $ dd count=50 bs=1M if=/dev/zero of=~/test.img
50+0 records in
50+0 records out
52428800 bytes (52 MB) copied, 1.55218 s, 33.8 MB/s

测试外接硬盘的读写速度：

hdparm -Tt /dev/sda1

pi@raspberrypi ~/downloads $ sudo hdparm -Tt /dev/sda1

/dev/sda1:
 Timing cached reads: 316 MB in 2.01 seconds = 157.46 MB/sec
 Timing buffered disk reads: 62 MB in 3.03 seconds = 20.48 MB/sec

pi@raspberrypi ~/downloads $ dd count=50 bs=1M if=/dev/zero of=/media/usbdisk/test.img

50+0 records in
50+0 records out
52428800 bytes (52 MB) copied, 13.5962 s, 3.9 MB/s

将external disk 格式化成ext4

sudo mount -t ext4 /dev/sda1 /media/usbdisk

pi@raspberrypi / $ sudo dd count=50 bs=1M if=/dev/zero of=/media/usbdisk/test.img

50+0 records in
50+0 records out
52428800 bytes (52 MB) copied, 1.15549 s, 45.4 MB/s

bingo!!