1 / 37

IE Lab Survival Course

IE Lab Survival Course. Part I : Remote Desktop Part II : IE Lab Survival Part III : Understanding Your Machine. Remote Desktop. Allow you to control your computer in home / hall from another location Comes from Windows XP Professional Windows XP Home users can try VNC

hesper
Download Presentation

IE Lab Survival Course

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. IE Lab Survival Course Part I : Remote Desktop Part II : IE Lab Survival Part III : Understanding Your Machine

  2. Remote Desktop • Allow you to control your computer in home / hall from another location • Comes from Windows XP Professional • Windows XP Home users can try VNC • Generally, remote desktop performs much better than VNC

  3. Setting up Remote Desktop • Four steps • Enable remote desktop in Windows • Set a password • Configure firewall to allow it (if you have one) • Setup a dynamic DNS service

  4. Enable Remote Desktop • My Computer -> Properties (Window-Break) • Remote -> Allow users to connect remotely to this computer • If you are not administrator, you need to add your user at “Select Remote Users…”

  5. Set password • For security reasons, Windows only allow you to remote login into users with passwords • If you don’t want to enter password when turning on your machine physically, the tool Tweak UI can help • http://www.google.com/search?q=Tweak+UI&btnI • (by the way, this is “I’m feeling lucky”) • Go to Logon -> Autologon and set a default user

  6. Configuring firewall • If you have a firewall installed, you must configure it to allow remote desktop connections • Windows XP SP2 or above has built-in Windows Firewall • Enable incoming connections to TCP port 3389 • Some basic networking concepts • IP • TCP / UDP • Ports

  7. IP • Computers are identified by IP addresses • Control Panel -> Network Connections -> double-click a connection -> Support • Alternatively, you can run “ipconfig” in cmd.exe • 192.168.x.x, 169.254.x.x and 10.x.x.x are “fake” IP’s • Think of your mailing address

  8. TCP / UDP • Messages sent to your computer usually come in two different “protocols”– TCP and UDP • Web browsing (HTTP) : TCP • Email (SMTP) : TCP • Remote Desktop : TCP • Warcraft 3 : UDP • Think of postal mail and packages

  9. Port • Your computer received a message, but which program is it for? • Programs are identified by “port”, a number between 1-65535 • Web servers : TCP port 80 • Email : TCP port 25 • Remote Desktop : TCP port 3389 • Warcraft 3 : UDP port 6112 • Think of the name written on envelopes

  10. Now have a try • Start -> Programs -> Accessories -> Communications -> Remote Desktop Connection • Alternatively, use Start -> Run (Window-R) -> “mstsc” • Find your IP address and connect to it • Do not use localhost / 127.0.0.1 to test • Couple of useful options • Display -> Full screen • Local Resources -> Local Devices -> Disk Drives • Enabling “Disk Drives” also allows you to copy and paste files between local and remote machines!

  11. Dynamic DNS service • For some ISP’s (and Resnet), your IP address changes every time • Can we have a fixed “name” like yahoo.com ? • This is called DNS – Domain Name Service • Go to cmd.exe and run “ping yahoo.com” C:\temp>ping yahoo.com Pinging yahoo.com [216.109.112.135] with 32 bytes of data: Reply from 216.109.112.135: bytes=32 time=360ms TTL=49 • Even if the IP address changes, the domain name will redirect you to the right machine

  12. Dynamic DNS service • Two free services • DynDNS • No-IP • Demonstration…

  13. IE Lab Survival Course Part I : Remote Desktop Part II : IE Lab Survival Part III : Understanding Your Machine

  14. Machines in IE network • WinXP machines • IEUGPxx • 1008PCxx • Weird names such as A5, C2, D6… • Solaris machines • Operating system is Unix • iesun2 ~ iesun11 • iesun3 should be the fastest

  15. Machines in IE network • Servers • samba-srv, samba-srv2 – U: • ielabnt0 – M: • iepclan – X: • printsrv – print server • gateway – SSH gateway • gateway2 – SFTP gateway • personal – web server • …

  16. Windows XP tips • Where to put your working data? • Desktop, My Documents, etc are stored in your “profile”, which is cleared when you login/logout • Don’t put important files there as they are lost if your machine hangs / reboots • U: is no good for large files • Network drive = slow • The drive is reliable, but the connection isn’t • Many people have lost data when saving files to U: • C:\temp is quite good • Fast, stable, not wiped out at reboot • Remember - it is cleared every 6:00 / 6:30 am

  17. Windows XP tips • U: is actually a share folder on samba-srv • A share folder has two parts – name/IP of the server, and name of the share • You connect to it as a network drive • My computer -> Tools -> Map Network Drive • Server : samba-srv • Share : <your username> • Or in cmd.exe • net use u: \\samba-srv\<username> • To disconnect • My computer -> Tools -> Disconnect Network Drive • net use u: /delete

  18. Windows XP tips • You can connect to someone else’s U: ! • You have to do it in cmd.exe • net use v: \\samba-srv\<username> /user:<username> • It will prompt for a password • Handy when working on group projects

  19. Solaris tips • Do you even know they exist? • Most common use is FTP to U: • Use SSH File Transfer Client or some FTP software to connect to gateway2.ie.cuhk.edu.hk • But you can also connect to a unix shell with • PuTTY (recommended) • SSH Shell Client • Inside CU (or with CU VPN) : iesun??.ie.cuhk.edu.hk • Outside CU : gateway.ie.cuhk.edu.hk, then run • ssh iesun??

  20. Solaris tips • Usage • Do Unix programming • Write PHP/Perl/Python programs • Setup website • Check U: quota iesun3 ~> quota -v Disk quotas for tng6 (uid 22989): Filesystem usage quota limit timeleft files quota limit /data/grad 330260 500000 500500 5176 8000 8100

  21. Website setup • You can setup your website there • Example: http://personal.ie.cuhk.edu.hk/~tng6/ • Steps • Create public_html folder in U: or by SSH-ing to gateway2 • Upload files into public_html folder • For folders, set “others” permission to read+execute (705) • For files, set “others” permission to read (604) • Usually the default setting is ok

  22. Website setup • Directory listing is by default disabled • To enable, create a file named “.htaccess” (yes, beginning with a dot) under public_html with the following: Options Indexes • More advanced configurations: DirectoryIndex index.htm index.html index.cgi index.php Options Indexes ExecCGI FollowSymLinks IndexOptions FancyIndexing NameWidth=* FoldersFirst IgnoreCase SuppressDescription RewriteEngine on RewriteRule ^wiki/?(.*)$ /~tng6/w/index.php?title=$1 [L,QSA]

  23. IE VPN • You should be familiar with CU VPN • In fact, there is an IE VPN as well • Server: rlabvpn.cuhk.edu.hk • Username: <IE username> • Password: <Windows/Unix password, I forgot> • Allow you to access FYP lab machines and U: • net use u: \\samba-srv.iepclan.ie.cuhk.edu.hk\<username> /user:<username> • We used to be able to access M:, but it seems no longer working

  24. IE VPN • Principle of VPN? • Actually, every network card (instead of computer) has an IP address • VPN is like creating a virtual network card with a long long LAN cable connecting your machine and the VPN server

  25. IE VPN • When connecting to samba-srv… • samba-srv.iepclan.ie.cuhk.edu.hk is a domain name • Windows resolves it by DNS and get 192.168.100.251 • Windows consider the three network interfaces (cards) • 203.218.123.234 • 137.189.210.251 • 192.168.58.51 • 192.168.58.51 “matches best” with 192.168.100.251, so it connects through IE VPN • Not entirely accurate, but the idea is like that

  26. IE Lab Survival Course Part I : Remote Desktop Part II : IE Lab Survival Part III : Understanding Your Machine

  27. Why? • Help eliminate repetitive tasks • Computers are supposed to simplify stuff, but without proper understanding it just make your life harder • Know how to utilize existing tools in creative ways • DOS commands? • Registry editing? • Make your computer run more efficiently • No need to upgrade so often, wonderful $$ savings! • Fix common problems by yourself

  28. Important concepts in Windows • Filesystem • Don’t worry, not talking about NTFS today • Registry • Processes • Services

  29. Filesystem • Foundation of your machine • Everything you run, everything you see (or don’t) exists somewhere in the filesystem • Knowing which files are which can be very helpful • Essential if you want to learn DOS commands • Tips • Set fixed pagefile size • Proper partitioning and defragmentation • Set very small browser cache

  30. Registry • A place for programs and Windows itself to store settings and run time information • HKEY_CLASSES_ROOT : filetype information • HKEY_CURRENT_USER (HKCU) : your own config • HKEY_LOCAL_MACHINE (HKLM) : machine-wide config • HKEY_USER contains the configuration for all users, one of the subkeys is mapped to HKCU • HKEY_CURRENT_CONFIG contains run time information, e.g. hardware information, running services; don’t modify • Tips • Show filename extensions in explorer • Keep an eye on Software\Windows\CurrentVersion\Run

  31. Processes • You can think of processes as “running programs” • Bring up task manager and look at them one by one • If you are familiar enough with your own machine, you can identify suspicious programs easily • Google is your friend • Tips • Keep the task manager icon in system tray • Watch the columns CPU usage, Virtual Memory size, Read and Write bytes

  32. Services • Services are essential components that keep your machine operational • DNS • Networking • File and printer sharing • Windows update • And many others • Not readily visible from task manager • But there are also a lot of useless services that waste CPU time and memory • You can get rid of them from services.msc • Warning : be very, very careful!

  33. Useful tools • Msconfig • Control what programs are run on startup • Tweak UI • Change many “hidden” settings • Process Explorer • Get detailed information on running processes • Treesize Professional • Nice overview of your disk usage

  34. Thank you! • Any questions?

More Related