2019年12月29日星期日
2009年5月14日星期四
BSD在教育中的应用
其中我觉得一位大学教授发表的一个帖子最好,对于BSD在教育中的应用作出了详细的说明。
我最同意他的两点BSD的“硬伤”:flash,和java。下面是摘录:
1、FreeBSD是最好的选择,在美国,可以花5-10美元就可以买到PII、PIII的机器,在它上面跑FreeBSD和OpenBSD都可以。Xfce需要PIII以上的CPU。如果PC-BSD用Fluxbox作为桌面,而不是用KDE,我想会更好一些。
2、squid即使不是基本系统的一部分,也必须可以用ports来安装。还有PF,我使用PF来控制学生们。
3、可以实现打印服务器、扫描服务器和文件服务器。(译注:看来外国比中国先进点,还给学生们配备打印和扫描)
4、ports有点少。(译注:好像是指PC-BSD的PBI,而不是指ports树)
5、虽然ports中有很多软件,但是我感觉教育方面的软件还是少了一些。
6、在PII和PIII的机器上,无法跑Google Earth。
7、需要OpenOffice, AbiWord+Gnumeric,还有LaTeX等。但是OpenOffice的确是一个内存消耗大户,Abiword要好一点,但是在看powerpoint文件的时候, 还是想用OpenOffice。
8、最致命的:flash!
还有其它的需求,比如:JAVA,VPN,浏览器、播放器、TunaPie和Miro(网络电视) 等。
我最同意他的两点BSD的“硬伤”:flash,和java。下面是摘录:
1、FreeBSD是最好的选择,在美国,可以花5-10美元就可以买到PII、PIII的机器,在它上面跑FreeBSD和OpenBSD都可以。Xfce需要PIII以上的CPU。如果PC-BSD用Fluxbox作为桌面,而不是用KDE,我想会更好一些。
2、squid即使不是基本系统的一部分,也必须可以用ports来安装。还有PF,我使用PF来控制学生们。
3、可以实现打印服务器、扫描服务器和文件服务器。(译注:看来外国比中国先进点,还给学生们配备打印和扫描)
4、ports有点少。(译注:好像是指PC-BSD的PBI,而不是指ports树)
5、虽然ports中有很多软件,但是我感觉教育方面的软件还是少了一些。
6、在PII和PIII的机器上,无法跑Google Earth。
7、需要OpenOffice, AbiWord+Gnumeric,还有LaTeX等。但是OpenOffice的确是一个内存消耗大户,Abiword要好一点,但是在看powerpoint文件的时候, 还是想用OpenOffice。
8、最致命的:flash!
还有其它的需求,比如:JAVA,VPN,浏览器、播放器、TunaPie和Miro(网络电视) 等。
A No-Nonsense Guide to the OpenBSD Firewall
he Book of PF
A No-Nonsense Guide to the OpenBSD Firewall
by Peter N.M. Hansteen
December 2007, 184 pp.
ISBN-13 978-1-59327-165-7
$29.95
$17.95 PDF
$35.95 PDF and Paperback
Click here to download Chapter 4: Wireless Networks Made Easy
OpenBSD'sstateful packet filter, PF, offers an amazing feature set and supportacross the major BSD platforms. Like most firewall software though,unlocking PF's full potential takes a good teacher.Peter N.M. Hansteen's PF website and conference tutorials have helpedthousands of users build the networks they need using PF. The Book of PFis the product of Hansteen's knowledge and experience, teaching goodpractices as well as bare facts and software options. Throughout thebook, Hansteen emphasizes the importance of staying in control byhaving a written network specification, using macros to make rule setsmore readable, and performing rigid testing when loading in new rules.
Today's system administrators face increasing challenges in the quest for network quality, and The Book of PFcan help by demystifying the tools of modern *BSD network defense. But,perhaps more importantly, because we know you like to tinker, The Book of PF tackles a broad range of topics that will stimulate your mind and pad your resume, including how to:
* Create rule sets for all kinds of network traffic, whether it iscrossing a simple home LAN, hiding behind NAT, traversing DMZs, orspanning bridges
* Use PF to create a wireless access point, and lock it down tight with authpf and special access restrictions
* Maximize availability by using redirection rules for load balancing and CARP for failover
* Use tables for proactive defense against would-be attackers and spammers
* Set up queues and traffic shaping with ALTQ, so your network stays responsive
* Master your logs with monitoring and visualization, because you can never be too paranoid
The Book of PF is written for BSD enthusiasts and networkadmins at any level of expertise. With more and more services placinghigh demands on bandwidth and increasing hostility coming from theInternet at-large, you can never be too skilled with PF.
PeterN.M. Hansteen is a consultant, writer, and sysadmin based in Bergen,Norway. A longtime Freenix advocate, Hansteen is a frequent lecturer onFreeBSD and OpenBSD topics. The Book of PF, Hansteen's first book, is an expanded follow-up to his very popular online PF tutorial.(该书作者提供的在线版本,没有这本书讲的详细)
A No-Nonsense Guide to the OpenBSD Firewall
by Peter N.M. Hansteen
December 2007, 184 pp.
ISBN-13 978-1-59327-165-7
$29.95
$17.95 PDF
$35.95 PDF and Paperback
Click here to download Chapter 4: Wireless Networks Made Easy
OpenBSD'sstateful packet filter, PF, offers an amazing feature set and supportacross the major BSD platforms. Like most firewall software though,unlocking PF's full potential takes a good teacher.Peter N.M. Hansteen's PF website and conference tutorials have helpedthousands of users build the networks they need using PF. The Book of PFis the product of Hansteen's knowledge and experience, teaching goodpractices as well as bare facts and software options. Throughout thebook, Hansteen emphasizes the importance of staying in control byhaving a written network specification, using macros to make rule setsmore readable, and performing rigid testing when loading in new rules.
Today's system administrators face increasing challenges in the quest for network quality, and The Book of PFcan help by demystifying the tools of modern *BSD network defense. But,perhaps more importantly, because we know you like to tinker, The Book of PF tackles a broad range of topics that will stimulate your mind and pad your resume, including how to:
* Create rule sets for all kinds of network traffic, whether it iscrossing a simple home LAN, hiding behind NAT, traversing DMZs, orspanning bridges
* Use PF to create a wireless access point, and lock it down tight with authpf and special access restrictions
* Maximize availability by using redirection rules for load balancing and CARP for failover
* Use tables for proactive defense against would-be attackers and spammers
* Set up queues and traffic shaping with ALTQ, so your network stays responsive
* Master your logs with monitoring and visualization, because you can never be too paranoid
The Book of PF is written for BSD enthusiasts and networkadmins at any level of expertise. With more and more services placinghigh demands on bandwidth and increasing hostility coming from theInternet at-large, you can never be too skilled with PF.
PeterN.M. Hansteen is a consultant, writer, and sysadmin based in Bergen,Norway. A longtime Freenix advocate, Hansteen is a frequent lecturer onFreeBSD and OpenBSD topics. The Book of PF, Hansteen's first book, is an expanded follow-up to his very popular online PF tutorial.(该书作者提供的在线版本,没有这本书讲的详细)
2009年5月11日星期一
今天上午上课完感觉很失落
当腾校长说,你还有多少内容没有讲时,我就知道时间讲多了!
下次上课把时间拿捏准,把要讲的知识必须转化为自己的语言,转化成自己的东西!
这是我的感受。不过可能再没有上课的机会;另外可能上课前没有和别人交流,也是失败的原因!
下次上课把时间拿捏准,把要讲的知识必须转化为自己的语言,转化成自己的东西!
这是我的感受。不过可能再没有上课的机会;另外可能上课前没有和别人交流,也是失败的原因!
2009年5月10日星期日
DeskHedron三维虚拟桌面应用 漂亮!
Windows专用)又一款免费软件介绍给大家喽!DeskHedron 一款很酷的3D动效虚拟桌面应用软件,虚拟桌面可以像游乐场的旋转木马那般漂亮转动。
Image Hosted by ImageShack.us
漂亮的3D视效除了美观之外还兼具了实用意义哦。之前也介绍过一款虚拟桌面 WindowsPager
,WindowsPager的虚拟窗口会占用不少的任务栏位置,随着应用程序的增多,任务栏已然是“稀缺资源”,相比之下,DeskHedron 只在系统托盘占一个位,而且操作相当简易,打开程序后,按下组合键Ctrl+Shift+Z,当前桌面便会缩入一个3D空间,上下滑动鼠标滚轮即可切换虚拟桌面。DeskHedron 默认开启两个虚拟桌面,用户最多可添加9个。
目前软件尚不支持多显示器。DeskHedron 为开源软件,免费使用,大小340KB。
系统要求:
http://www.tokyodownstairs.com/
* 2000/XP
* DirectX9.0c(XP SP2以后的版本已自带)
下载:http://tokyodownstairs.com/binary/DeskHedron.zip
http://tokyodownstairs.blogspot.com/2008/10/deskhedron.html
Image Hosted by ImageShack.us
漂亮的3D视效除了美观之外还兼具了实用意义哦。之前也介绍过一款虚拟桌面 WindowsPager
,WindowsPager的虚拟窗口会占用不少的任务栏位置,随着应用程序的增多,任务栏已然是“稀缺资源”,相比之下,DeskHedron 只在系统托盘占一个位,而且操作相当简易,打开程序后,按下组合键Ctrl+Shift+Z,当前桌面便会缩入一个3D空间,上下滑动鼠标滚轮即可切换虚拟桌面。DeskHedron 默认开启两个虚拟桌面,用户最多可添加9个。
目前软件尚不支持多显示器。DeskHedron 为开源软件,免费使用,大小340KB。
系统要求:
http://www.tokyodownstairs.com/
* 2000/XP
* DirectX9.0c(XP SP2以后的版本已自带)
下载:http://tokyodownstairs.com/binary/DeskHedron.zip
http://tokyodownstairs.blogspot.com/2008/10/deskhedron.html
2009年5月9日星期六
2009年5月6日星期三
感动
王老师在《在新课程下教师的教学行为》讲到老师要尊重、赞赏学生:其中讲到一位老师总说你的孩子笨,学习不行,考上大学有难度;可是孩子的妈妈总是以一种赞赏的口气说:你的老师说以目前的成绩,再稍稍加一把劲,你就能考上大学;最终孩子真的真的收到用特快专递邮清华大学录取通知书!孩子顿时到自己的房间哭起来,妈妈也禁不住哭起来……当听到王老师在102教室讲完时,我的眼泪一酸~~~~~~~~~~~~~~~
其实我总骨子里认为我是个比较笨的人,学习不行,也没有什么朋友;可是我的妈妈总鼓励我;
有一次我说:人家别人再不行,也总比我强;妈妈说,你比他强,他还不胜你!我也听了曾仕强教授课,一个人心中要有父母,出门在外,不要给父母丢脸;要和自己比,要倾听自己的心声;在家靠父母,出门靠朋友!
王静老师提问一位老师,那位老师说:他上课,每次总是提问那些默默无闻的学生,在教室的角落里不受重视或受冷落的学生;一个人如果恰当地尊重、赞赏学生,那么对这位学生的心灵会产生很大的震憾!
其实我总骨子里认为我是个比较笨的人,学习不行,也没有什么朋友;可是我的妈妈总鼓励我;
有一次我说:人家别人再不行,也总比我强;妈妈说,你比他强,他还不胜你!我也听了曾仕强教授课,一个人心中要有父母,出门在外,不要给父母丢脸;要和自己比,要倾听自己的心声;在家靠父母,出门靠朋友!
王静老师提问一位老师,那位老师说:他上课,每次总是提问那些默默无闻的学生,在教室的角落里不受重视或受冷落的学生;一个人如果恰当地尊重、赞赏学生,那么对这位学生的心灵会产生很大的震憾!
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