最近宿舍使用树莓派心得一二
使用vpn连接校网：
1.绑定静态ip地址
http://service.chinasinew.com/
2.安装vpn，下源码包
http://www.cc98.org/dispbbs.asp?boardID=212&ID=2323871&page=1
3.配置帐号密码，或用以下脚本
http://pan.baidu.com/s/1qWr2w7y
编译树莓派内核：
参考文章：
http://blog.csdn.net/jinzheng_2010/article/details/8676213
注意：
下载内核代码时git clone一直会断开，那就去网页下zip，
下完将其放入linux后用jar xvf解压，否则编译会出现错误。
备份树莓派镜像2014-12：
http://pan.baidu.com/s/1pJ9LtKf
备份我的源码3.12.25：（可编译）配合前面的镜像中的config才行
http://pan.baidu.com/s/1jG89Atg
备份config.gz，3.12.25版
备份RpiTools，我使用的是64位的交叉编译工具
http://pan.baidu.com/s/1kTzKfAZ
PATH=$PATH:~/build_pi/RpiTools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin
配置Exim4发送邮件：
apt-get install exim4
自动配置：
dpkg-reconfigure exim4-config
使用smarthost发信
(1)将配置文档拆分成小文件么? 否
(2)选择“用smarthost发信;无本地邮件”
(3)系统邮件名称，raspberrypi
(4)要监听的入站 SMTP 连接的 IP 地址：127.0.0.1 (这样，就只有本机可以利用exim4)
(5)其它可接受的邮件目的地址：(empty)
(6)为这些主机进行邮件转发：(empty)
(7)负责处理从本机寄出的邮件的机器(smarthost)：真正用来外发邮件的smtp地址(我这里用smtp.qq.com)
(8)保持最小DNS 查询量吗(按需拔号 Dial-on-Demand)? 否
(9)或者直接修改文件/etc/exim4/update-exim4.conf.conf内容如下：
# /etc/exim4/update-exim4.conf.conf # # Edit this file and /etc/mailname by hand and execute update-exim4.conf # yourself or use 'dpkg-reconfigure exim4-config' # # Please note that this is _not_ a dpkg-conffile and that automatic changes # to this file might happen. The code handling this will honor your local # changes, so this is usually fine, but will break local schemes that mess # around with multiple versions of the file. # # update-exim4.conf uses this file to determine variable values to generate # exim configuration macros for the configuration file. # # Most settings found in here do have corresponding questions in the # Debconf configuration, but not all of them. # # This is a Debian specific file dc_eximconfig_configtype='smarthost' dc_other_hostnames='raspberrypi' dc_local_interfaces='127.0.0.1' dc_readhost='' dc_relay_domains='' dc_minimaldns='false' dc_relay_nets='' dc_smarthost='smtp.qq.com' CFILEMODE='644' dc_use_split_config='false' dc_hide_mailname='false' dc_mailname_in_oh='true' dc_localdelivery='mail_spool'
其余设置（重要！）
(1)/etc/exim4/passwd.client，smtp的帐号密码设置
# password file used when the local exim is authenticating to a remote # host as a client. # # see exim4_passwd_client(5) for more documentation # # Example: ### target.mail.server.example:login:password smtp.qq.com:QQ号:QQ密码
(2)/etc/email-addresses，系统邮箱地址（如不填写，则会报错：用户名必须与发件用户相同）
# This is /etc/email-addresses. It is part of the exim package # # This file contains email addresses to use for outgoing mail. Any local # part not in here will be qualified by the system domain as normal. # # It should contain lines of the form: # #user: someone@isp.com #otheruser: someoneelse@anotherisp.com root: qq@qq.com
(3)log文件cat /var/log/exim4/mainlog，调试时使用
(4)清空邮件，cat /var/mail/mail
exim -bpru | awk {'print $3'} | xargs exim -Mrm
树莓派的时区和网络对时！
1.安装ntp，输入
sudo apt-get install ntpdate
2.修改时区，输入
tzselect
3.按照自己的时区修改
4.确认选择
TZ='Asia/Shanghai'; export TZ
5.配置网络对时，输入
sudo ntpdate cn.pool.ntp.org
Sun Feb 1 17:54:48 CST 2015
CST：China Standard Time 中国标准时间(北京时间) UTC 8:00
