How to Compute Like a Grad
Student
Chris Colohan
colohan+@cs.cmu.edu
Old History…
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<91 Concept Terminal w/ Vaxen
91 IBM RT 12MB/250MB
92 16MHz MIPS R3000 DecStation 3100
93 20MHz MIPS R3000 DecStation 5000/20
94 25MHz MIPS R3000 DecStation 5000/25 or
PowerMac 7100/66
95 DecStation 5000/200s with mono monitor
96 Sun SparcStation 4
(No, this is not a Moore’s law slide.)
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Recent History…
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97
98
99
00
01
02
03
266MHz PII/64MB/4GB
400MHz PII/128MB/6GB
500MHz PIII/128M/8GB
733MHz PIII/256MB/20GB
1GHz PIII/512MB/40GB
1.8GHz PIV/1GB/60GB
2.4GHz PIV/1GB/80GB
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In Today’s Talk
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Administering your machine
Communicating with others
Kerberos and AFS
Useful tips and links
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The RPP
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Be nice!
Refill the printers
Don't leave the printers jammed (x8-2607)
Don't print big jobs during peak hours
Ask facilities before you do strange things
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broadcast packets
move hardware
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commercial anything
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looking through other people's files: get
explicit permission first
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look for permissions in their .plan
ask them directly
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Do Today!
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.plan file
door label
home page
Andrew
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finger firstname.lastname@andrew.cmu.edu
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login = first 8 digits of SS#
Email forwarding
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colohan@cmu.edu name
ccolohan@andrew.cmu.edu name
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More to do today!
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Create username.root
telnet jeeves
kerberos create
username.root
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Mail facilities and ask for root on your
machine
Local password: “passwd –l”
Ask for a copy# from the main office
(WeH4212)
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How to get help
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Office mates
Zephyr
help@cs.cmu.edu
Help desk (x8-4231) “how do I…?”
Operator (x8-2607) “machines are
down…”
Facilities advisory committee
(dpelleg+@cs.cmu.edu)
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Where does the money go?
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Costs money:
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new kerberos Ids
printing
network ports
software
backups
dialups (1-800)
Free:
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accounts on machines
WaveLan
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Kerberos
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Log in, get a “ticket”
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Tickets are good for 25 hours
Used for:
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klist, kinit
Authentication (log into other machines without passwords)
Encryption (make sure nobody can snoop your connections)
Renew for 30 days: krenew (unix only)
Renew forever: kkerberos (unix only)
network/clock failurekerberos failurelogin failure
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afs
/afs/cs/user/colohan/…
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Using afs
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Access control:
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fs help
fs listacl /afs/cs/user/colohan
fs setacl /afs/cs/user/colohan colohan rlidwka
mkdir ~/private
fs setacl ~/private –clear colohan rlidwka
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Ignore unix permissions!
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Turn tickets into tokens with aklog
Quotas:
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Careful with mail directory permissions!
fs quota /afs/cs/user/colohan
telnet jeeves
Backups in ~/OldFiles
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NOT Using afs
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Why not?
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Writes go to server on close
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Security
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Can be slow (especially for builds)
Bits sent on network in the clear
Server or network down
== no work for you
Use local disk (/usr0)
May want to move home dir to /usr0
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or create a local account on your machine
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Windows
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Run Windows update NOW
Always log into SCS domain!
Email
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Use pop3 to your maildrop (ux#.cs.cmu.edu)
imap/Exchange in beta
Do not run a client on the ux# servers!
Printing
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Printers off of \\monolith
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Windows cont.
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File sharing
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Telnet/ssh
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AFS
Can make a FAT partition if you want
putty (ssh)
niftytelnet (kerberized telnet)
Peter Dinda’s FAQ
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Insert Windows Demo Here
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Linux
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Choose a window manager
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Depot
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edit ~/.xinitrc (WM=startkde)
It “owns” /usr/local
make your own collections
become a misc maintainer
Getting local root if your machine dies
vmware
Local disk is /usr0
man cdrecord (or use a cdrecord gui)
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Insert Linux Demo Here
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Zephyr
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A reminder: ZINMT
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Zephyr Is Not My Thesis
Command line version:
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zwgc (started by default)
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zwrite colohan –m “Lunch?”
Blatant plug: kzephyr!!
Emacs zephyr mode
For Windows: jzephyr (beta testers wanted!)
FZQ
Zephyr archive (contains posting interface!)
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Public Zephyr
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Common “instances”:
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help.*, chat.*, newsbites, graffiti,
ephemera, sddd, *.d, facilities.announce,
facilities.discussion
Don’t sign messages
Don’t take people too seriously
Andrew/MIT zephyr use is different
Filter instances you are not interested in
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Netnews (bboards)
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cmu.cs.scs: important announcements
cmu.cs.*.announce: new software or
changes
cmu.cs.general: general interest items
cmu.misc.market: fun fun fun!
On unix, use localhost as news server
On Windows, use dnntpd.srv
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ssh
ssh –X colohan@ux4.sp.cs.cmu.edu
scp gs138.sp:~/foobar ./
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Very useful from off campus!
Putty and TeraTerm ssh works well in
Windows
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Email filtering
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Create a .maildelivery file on your
maildrop machine (ux#)
man maildelivery
Use username+foo@cs.cmu.edu
man spamassassin-maildelivery
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More Resources
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SCS facilities help page
Last year’s talk
CMU web resources
Jonathan Billings’ rh9 tip page
man phone
This talk can be found at:
www.cs.cmu.edu/~colohan/ic03/htclags.htm
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