在删除数据的过程中可能会出现错删的现象，如果发现出现相关问题请马上与我联系，我会尽可能给与恢复，而被删除的用户文件夹里的数据可能会永久丢失，数据库的话会在5日内被系统自动清除，所以遇到问题请尽快。
而自己的过往数据可以用ssh或者ftp在 ~/.snapshot 里找到备份，文件备份是最多保存30天的。

为了管理方便，请大家不要乱建用户，如果有必要新建用户的话（包括MySQL用户和Shell / FTP用户），请事先跟我申请，不然我会在不定期检查帐户时删除非法帐户（小狼和小博童鞋，请再注意了 = =）。

只因要对MySQL用户改名是不可能的事情，所以请大家珍惜拥有的ID。

以下是一些常用的链接：
Wiki：http://wiki.dreamhost.com/
管理域名：https://panel.dreamhost.com/index.cgi?tree=domain.manage
管理数据库：https://panel.dreamhost.com/index.cgi?tree=goodies.mysql
一键安装：https://panel.dreamhost.com/index.cgi?tree=goodies.installer
数据恢复方法：http://wiki.dreamhost.com/Snapshot_data_restoration
设置防盗链：https://panel.dreamhost.com/index.cgi?tree=goodies.webdav

在新建数据库时请先选择自己要绑定域名的数据库，数据库用户名请务必使用原有的而不是新建的
一般新建域名并且绑定数据库会需要以下过程：
先进入 Domains>Manage Domains
点击 Add New Domain / Sub-Domain
在 Domain to host 写好要绑定的域名
确认 Extra Web Security? 已经被选中，确认 FTP user / CGI-runs-as user 为已存在用户
把所需要的服务给选/填好
点击 Fully host this domain now! 完成绑定

再进入 Goodies>Manage MySQL
找到 Create a new MySQL database 这个标题下的 Database Name
这里请使用 USER_DBNAME 的格式新建数据库
在 Use Hostname 选择 Create a new hostname now...
在 New Hostname 把 mysql 绑定到刚才新建的域名上
在 First User 选择已存在的用户
在 Database Comment 里写上数据库的基本摘要，以便管理
最后点击 Add new database now! 完成新建数据库操作

再次进入 Domains>Manage Domains
找到刚才绑定的域名，点开 DNS 的链接，这里就是你需要绑定的内容了
若是已经在你本人的域名控制面板里绑定了 Dreamhost 的 NS 记录的话就基本可以不需要管这些了
Dreamhost 的 NS 记录如下：
ns1.dreamhost.com.
ns2.dreamhost.com.
ns3.dreamhost.com.

昨天晚上回家例行查了一下邮件，例行查一下邮件，发现某咖啡在gtalk上留言说我的小站down了，显示error 500，吃完晚餐后7x24给我发来了邮件，也是说我的站down了。于是小弟就上线找客服，在DreamHost的wiki上找了半天都没找到原因。到了今天中午起床，收到客服的邮件，说我的程序内存超出了指定限制。我马上把DreamHost默认的php.ini和我定制的php.ini都下下来，怎么查也查不出问题来。我只好继续搜索，在DreamHost的论坛上逛了半天，终于找到了原因，是因为php.cgi运行超时了，在ssh下运行了一下"killall php.cgi"，所有服务马上重新正常运行！呵呵！谢谢某咖啡！

PS：额外附送一个小弟在做的theme截图
[photopress:wp_theme_ss_1.png,full,pp_image]

Message from you (Mar 2nd, 2007 - 01:27:05 / #1755252)
Subject: SAVE US! People are DYING! Downed sites:
gailou.com
heyamigo.cn
lovebaby.biz
wikiwind.net

Downed users: our420/suwarm/gailou
Panding WebID: our420

uptime: 00:18:34 up 20:34, 5 users, load average:
49.29, 57.98, 52.72 (VERY LOW UPTIME!)

Our old server "coffee" is more steady than our
current server "welchs". The current server is very
UNSTEADY!,it often restarts,please move our data to
another server.

幸运的是DreamHost的客服反应够快，很快就给了我答复，说是答应我的要求，把我们搬到名叫“monster”的新服务器上，他的介绍说是“This
is a newer server with very good stability and very low load.”果然这台服务器性能相当不赖。附全文：

Reply from DreamHost (Mar 2nd, 2007 - 04:31:47 / #10533451)
Subject: Re: SAVE US! People are DYING! Hello Wang,

So sorry for the downtime! I've moved you from welchs to monster. This
is a newer server with very good stability and very low load. Keep in
mind, this move may take from 24-48 hours to take effect. Please let me
know if you have any other questions!

Thanks!
Jeffrey

今天搬过来以后，发现所有域名都可以连得上了，而且速度还不错，但bad_httpd_conf的情况还是没有改善，于是在写这篇blog的前再给客服发了封mail，希望到了明天大家的网站都可以正常访问啦！

PS：新的服务器的名字真的很geek哦～！
叫怪物哦～这难道是DreamHost的自嘲？呵呵！
附个monster的uptime：
00:32:48 up 4 days,  5:57,  4 users,  load average: 0.09, 0.18, 0.20
Update：前天给客服再发了个Mail，昨天他给我了个答复，看来原来绑定A记录的都换成新的A记录或者绑定他们的NS记录。

Ah, since you're not using our nameservers you'll need to manually update
where your custom nameservers are pointing to. After the moves, your
sites are at different IP addresses, but the nameservers are still
pointing at the old machines. Basically it'll be way easier if you
switch over to our nameservers for your domains. That way if there's
ever an IP address change in the future we'll take care of it
automatically. Otherwise you'll need to go to the Domains > Manage
Domains section of your panel at
https://panel.dreamhost.com/index.cgi?tree=domain.manage& and then click
the "DNS" link for the domain. Then just make sure that the A records
match up between that page and what you've got setup at your nameservers.
You'll need to contact your registrar or DNS service to take care of
that end of things.
If there's anything else I can help you with, just let me know!

Thanks!
Craig

前几天在robinz那看到了在Dreamhost上安装eAccelerator的教程，听说eAccelerator要比zend快多了，手就有点痒，这几天都在尝试编译安装PHP-4.4.4，但已经出错了三次，大都是因为脚本的问题，准备第四次的时候竟然一不小心rm -rf php *差点把所有东西都删了，幸好还有较早前的备份才恢复过来，今天就把Wordpress升到2.0.6，趁还有时间顺便也把页面的css调整了一下，加了两张背景。

实际动手才发觉跟想象的也差太远了，安装PHP4就是因为参数和网数的问题令成功几率大大降低，而且在网上的那些脚本多数都不太完全对的，需要改动的地方也不少。就PHP4的编译小弟也积累了些经验， 刚开始我只按照robinz的方法装的，但是因为php4已经出到4.4.4了，而iMap也升级到2006了，2004g的下载地址也已经失效了，还有一好几个文件镜像都失效，后来只好参照Dreamhost官方提供的脚本重新编译，而又因为Dreamhost的脚本写的比较优美，所以我最后还是以它为基础按照robinz的参数重新安装。在这里有几点要注意的，Dreamhost提供的脚本是默认没有打开FastCGI参数的，而robinz上面又有几个变量稍微不同，还有编译的时候最好把脚本放到$HOME目录执行，这样才不会产生多余的php链接。

下面是我修改过的脚本

#!/bin/bash

# Abort on any errors
set -e

# The domain in which to install the PHP CGI script.
export DOMAIN="freemagi.com"

# Update version information here.
PHP="php-4.4.4"
LIBICONV="libiconv-1.10"
LIBMCRYPT="libmcrypt-2.5.7"
LIBXML2="libxml2-2.6.23"
LIBXSLT="libxslt-1.1.15"
MHASH="mhash-0.9.4"; MHASH_TAR="${MHASH}a" # Pests!
ZLIB="zlib-1.2.3"
CURL="curl-7.15.2"
LIBIDN="libidn-0.6.2"
FREETYPE="freetype-2.1.10"
IMAP="imap-2004g"
# Set DISTDIR to somewhere persistent if you plan to muck around with this
# script and run it several times! It is where distributions are downloaded.
DISTDIR=${HOME}/dist

# Where do you want all this stuff built? Using a local filesystem is best.
# ***Don't pick a directory that already exists!*** We clean up after
# ourselves at the end!
SRCDIR=${HOME}/source

# And where should it be installed? A versioned directory eases upgrades!
INSTALLDIR=${HOME}/${PHP}

# A simple name link eases use
ln -s ${INSTALLDIR} php
# What PHP features do you want enabled?
PHPFEATURES="--prefix=${INSTALLDIR} \
--enable-force-cgi-redirect \
--enable-gd-native-ttf \
--enable-ftp \
--enable-sockets \
--enable-wddx \
--enable-sqlite-utf8 \
--enable-calendar \
--enable-mbstring \
--enable-mbregex \
--enable-soap \
--enable-fastcgi \
--enable-exif \
--with-config-file-path=${INSTALLDIR}/etc/php4 \
--with-xml \
--with-libxml-dir=${INSTALLDIR} \
--with-freetype-dir=${INSTALLDIR} \
--with-xsl=${INSTALLDIR} \
--with-openssl=/usr \
--with-mhash=${INSTALLDIR} \
--with-mcrypt=${INSTALLDIR} \
--with-zlib-dir=${INSTALLDIR} \
--with-jpeg-dir=/usr \
--with-png-dir=/usr \
--with-gd \
--with-mysql=/usr --with-mysqli \
--with-curl=${INSTALLDIR} \
--with-iconv=${INSTALLDIR} \
--with-imap=${INSTALLDIR}
--with-imap-ssl=/usr \
--with-gettext \
--without-pear"

# ---- end of user-editable bits. Hopefully! ----

# Push the install dir's bin directory into the path
export PATH=${INSTALLDIR}/bin:$PATH

#setup directories
mkdir -p ${SRCDIR}
mkdir -p ${INSTALLDIR}
mkdir -p ${DISTDIR}
cd ${DISTDIR}

# Get all the required packages
wget -c http://us3.php.net/distributions/${PHP}.tar.gz
wget -c http://ftp.gnu.org/pub/gnu/libiconv/${LIBICONV}.tar.gz
wget -c http://easynews.dl.sourceforge.net/sourceforge/mcrypt/${LIBMCRYPT}.tar.gz
wget -c http://xmlsoft.org/sources/xml/${LIBXML2}.tar.gz
wget -c http://xmlsoft.org/sources/xml/${LIBXSLT}.tar.gz
wget -c http://easynews.dl.sourceforge.net/sourceforge/mhash/${MHASH_TAR}.tar.gz
wget -c http://www.zlib.net/${ZLIB}.tar.gz
wget -c http://curl.haxx.se/download/${CURL}.tar.gz
wget -c ftp://alpha.gnu.org/pub/gnu/libidn/${LIBIDN}.tar.gz
wget -c http://easynews.dl.sourceforge.net/sourceforge/freetype/${FREETYPE}.tar.gz
wget -c ftp://ftp.cac.washington.edu/imap/old/${IMAP}.tar.Z

cd ${SRCDIR}
# Unpack them all
tar xzf ${DISTDIR}/${PHP}.tar.gz
tar xzf ${DISTDIR}/${LIBICONV}.tar.gz
tar xzf ${DISTDIR}/${LIBMCRYPT}.tar.gz
tar xzf ${DISTDIR}/${LIBXML2}.tar.gz
tar xzf ${DISTDIR}/${LIBXSLT}.tar.gz
tar xzf ${DISTDIR}/${MHASH_TAR}.tar.gz
tar xzf ${DISTDIR}/${ZLIB}.tar.gz
tar xzf ${DISTDIR}/${CURL}.tar.gz
tar xzf ${DISTDIR}/${LIBIDN}.tar.gz
tar xzf ${DISTDIR}/${FREETYPE}.tar.gz
uncompress -cd ${DISTDIR}/${IMAP}.tar.Z |tar x

# Build them in the required order to satisfy dependencies.

#libiconv
cd ${SRCDIR}/${LIBICONV}
./configure --enable-extra-encodings --prefix=${INSTALLDIR}
make
make install

#libxml2
cd ${SRCDIR}/${LIBXML2}
./configure --with-iconv=${INSTALLDIR} --prefix=${INSTALLDIR}
make
make install

#libxslt
cd ${SRCDIR}/${LIBXSLT}
./configure --with-libxml-prefix=${INSTALLDIR} --prefix=${INSTALLDIR}
make
make install

#zlib
cd ${SRCDIR}/${ZLIB}
./configure --shared --prefix=${INSTALLDIR}
make
make install

#libmcrypt
cd ${SRCDIR}/${LIBMCRYPT}
./configure --disable-posix-threads --prefix=${INSTALLDIR}
make
make install

#mhash
cd ${SRCDIR}/${MHASH}
./configure --prefix=${INSTALLDIR}
make
make install
# FIXME: For some reason, mincludes.h isn't copied across
cp ${SRCDIR}/${MHASH}/include/mutils/mincludes.h ${INSTALLDIR}/include/mutils

#libidn
cd ${SRCDIR}/${LIBIDN}
./configure --with-iconv-prefix=${INSTALLDIR} --prefix=${INSTALLDIR}
make
make install

#cURL
cd ${SRCDIR}/${CURL}
./configure --with-ssl=${INSTALLDIR} --with-zlib=${INSTALLDIR} \
--with-libidn=${INSTALLDIR} --enable-ipv6 --enable-cookies \
--enable-crypto-auth --prefix=${INSTALLDIR}
make
make install

#freetype
cd ${SRCDIR}/${FREETYPE}
./configure --prefix=${INSTALLDIR}
make
make install

# imap
cd ${SRCDIR}/${IMAP}
make ldb
# Install targets are for wusses!
cp c-client/c-client.a ${INSTALLDIR}/lib/libc-client.a
cp c-client/*.h ${INSTALLDIR}/include

#PHP 4
cd ${SRCDIR}/${PHP}
./configure ${PHPFEATURES}
make
make install

#copy config file
mkdir -p ${INSTALLDIR}/etc/php4
cp ${SRCDIR}/${PHP}/php.ini-dist ${INSTALLDIR}/etc/php4/php.ini

#copy PHP CGI
mkdir -p ${HOME}/${DOMAIN}/cgi-bin
chmod 0755 ${HOME}/${DOMAIN}/cgi-bin
cp ${INSTALLDIR}/bin/php ${HOME}/${DOMAIN}/cgi-bin/php.cgi
echo ---------- INSTALL COMPLETE! ----------

Download: instphp4.sh

运行

chmod +x instphp4.sh
./instphp4.sh

wget http://ftp.gnu.org/gnu/autoconf/autoconf-2.59.tar.bz2
tar -xjf autoconf-2.59.tar.bz2
cd autoconf-2.59
./configure -prefix=YOUR PATH
make
make install

安装automake

wget http://ftp.gnu.org/gnu/automake/automake-1.9.6.tar.bz2
tar -xjf automake-1.9.6.tar.bz2
cd automake-1.9.6
./configure -prefix=YOUR PATH
make
make install

然后我们来看看eAccelerator的软件环境需求：
apache 1.3, apache 2.0 (prefork), mod_php4/5
我们的Dreamhost都能够支持，好了，下面到请主角出场：

安装eAccelerator（下面的地址如果不通的话最好自己到eAccelerator的PojectPage找合适的镜像）

wget http://voxel.dl.sourceforge.net/sourceforge/eaccelerator/eaccelerator-0.9.5.tar.bz2
tar -xjf eaccelerator-0.9.5.tar.bz2
cd eaccelerator-0.9.5
export PATH=$PATH:YOUR PATH/bin #这里的是指你安装autoconf的目录，譬如我的是$HOME/local/bin
export PHP_PREFIX=YOUR PHP PATH #这里是你的安装php的位置，就是$HOME/php，但有一个小细节要注意的，在robinz的文里是写export PHP_PREFIX= YOUR PHP PATH/bin的，其实如果这样写的话，configure是不会成功的
$PHP_PREFIX/bin/phpize
./configure -prefix=YOUR PATH --enable-eaccelerator=shared --with-php-config=$PHP_PREFIX/bin/php-config
make
make install #最好还是make install一下，不make install会有la文件
mv YOUR PHP PATH/lib/php/extensions/no-debug-non-zts-一行数字/eaccelerator.so YOUR PHP PATH/lib/php/extensions/
rm -r YOUR PHP PATH/lib/php/extensions/no-debug-non-zts-一行数字/

[eAccelerator]
zend_extension="/home/YOUR PHP PATH/lib/php/extensions/eaccelerator.so"
eaccelerator.shm_size="16"
eaccelerator.cache_dir="/home/YOUR HOME/tmp/eaccelerator"
eaccelerator.enable="1"
eaccelerator.optimizer="1"
eaccelerator.check_mtime="1"
eaccelerator.debug="0"
eaccelerator.filter=""
eaccelerator.shm_max="0"
eaccelerator.shm_ttl="0"
eaccelerator.shm_prune_period="0"
eaccelerator.shm_only="0"
eaccelerator.compress="1"
eaccelerator.compress_level="9"

[Zend]
zend_extension="/usr/local/dh/apache/template/phpext/ZendExtensionManager.so"
zend_extension="/usr/local/dh/apache/template/phpext/zend_optimizer4/ZendOptimizer.so"
zend_optimizer.optimization_level=1023

然后再运行

mkdir -p ~/tmp/eaccelerator
chmod 777 ~/tmp/eaccelerator

最后，别忘了在你的.htaccess文件里加上

AddHandler phpFour .php
Action phpFour /cgi-bin/php.cgi

再下一个iProber 探针，看看PHPINFO就可以看到

This program makes use of the Zend Scripting Language Engine:
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies with eAccelerator v0.9.5, Copyright (c) 2004-2006 eAccelerator, by eAccelerator with Zend Extension Manager v1.0.9, Copyright (c) 2003-2006, by Zend Technologies with Zend Optimizer v2.6.2, Copyright (c) 1998-2006, by Zend Technologies

先是数据库备份脚本
#ftp Info
host=HOST #ftp host
UserName=USER #ftp user name
Passwd=PASSWD #fto user password

#MySQL Info
SQL_host=DB_HOST #MySQL host
SQL_User=DB_USER #MySQL UserName
SQL_Passwd=DB_PASSWD #User Password
SQL_db=DB_NAME #database name

backup_path=/home/YOUR TMP PATH #set saved backup path
file=$SQL_db-$(date +%Y%m%d).tar.gz
MySQL_path=/usr/bin #set the mysql database bin path

cd $backup_path
#export database
$MySQL_path/mysqldump -h $SQL_host -u$SQL_User -p$SQL_Passwd --databases $SQL_db>$SQL_db.dump

sleep 5s
#file tar
tar -czf $backup_path/$file $SQL_db.dump
gpg -e -r GPGID $file #有关gpg加解密请GOOGLE一下

cd $backup_path

#file ftp
ftp -i -n <<!
open $host
user $UserName $Passwd
cd /dbbak #请事先在你的备份用FTP上建立此目录
put $file.gpg
bye
!

sleep 10s
rm -rf $backup_path/$file
rm -rf $backup_path/$SQL_db.dump
rm -rf $backup_path/$file.gpg

---

然后是文件备份的
WEBFILE=webdir-$(date +%Y%m%d).tar.gz
cd $HOME

sleep 1s
tar -czf $HOME/YOUR TMP PATH/webdir-$(date +%Y%m%d).tar.gz $HOME/YOUR PATH

sleep 10s
cd $HOME/YOUR TMP PATH
gpg -e -r YOUR GPG ID $WEBFILE

sleep 15s
ftp -i -n <<!
open YOUR FTP HOST
user USERNAME PASSWD
cd webbak #这个也是要事先建好
put $WEBFILE.gpg
bye
!

sleep 5s
rm -rf $HOME/YOUR TMP PATH/$WEBFILE.gpg
rm -rf $HOME/YOUR TMP PATH/$WEBFILE

---

Enjoy!