Services at the ITU network
Contents
1. In Table 1 below you can see how to reach your home directory from Linux and Windows respectively In Linux for instance if your user name is noname then you should write 1s import home noname at the command prompt to list the contents of your home directory In Windows you should open Windows Explorer press Windows key and simultaneously and click on the H drive to get the same result Table 1 Network drive Path in Linux Path in Windows Home directory import home lt brugernavn gt H Share import stud share S Temp import temp Ty All users home directories import home U WebShare import stud www W Please note that everyone can see the contents of your home directory If you would like to keep certain data private you should put it in the subdirectory called private You can find the private directory in your home directory and only you can see its contents Some of the network drives are shared network drives For instance the Share folder is used by groups of students who by request have had a Unix group made This Unix group is assigned a subfolder and only group members are allowed to read and write data from and to this subfolder The group folders are ordered by semester in the Share folder there is a subfolder Sysadm 12 01 2006 1 for each semester called projects_xxxxx where xxxxx is the name of the semester for instance e2002 fall or 2003 spring An exam2. When you are created as a user on ITU you will automatically get an email account with the address lt user name gt itu dk where lt user name gt is the name you use to log on the computers on ITU You need a mail client to read your email and SysAdm recommends that you use Mozilla for this purpose as Mozilla is platform independent this means that Mozilla is available to both Windows Linux and Mac computers This way the user will only have to get used to one application even if he works on multiple platforms It is important that you configure your mail client to use the IMAP protocol as this ensures that your mails are saved and kept on the ITU mail server It also means that they will be backed up and that you can read your old email no matter which ITU computer you use These things will not work with the POP3 protocol Newsgroups also known as news are an important alternative to email Newsgroups are a kind of discussion fora with a specific topic for each group For instance ITU s news server has a newsgroup for every course where you can discuss course related things Unlike email you do not receive every news article in an inbox you have to keep track of the discussions yourself Read more about news at http www itu dk sysadm data mail_news Reading email with Mozilla To read your mail you should start up Mozilla s mail client In Windows you do this by clicking the Start menu and then clicking Programs Mozilla and M
3. Services at the ITU network The aim of this 4 page folder is to give you some concrete skills that are valuable on the ITU network please also read the folder Get started on the ITU network The following five topics will be discussed _ File structure _ Print _ Email and newsgroups _ Your own home page _ Access from home Webmail SSH File structure As a user on ITU you have a number of network drives at your disposal A network drive is a drive that is not installed physically in the computer you are working with Instead the drive actually one or more hard disks is placed on a file server and data to and from the drive is transported via the network The most important network drive is you home directory This is where you should save your personal data As disk storage on the file server is a scarce resource we have put quotas on the user s disk space usage to avoid storage shortage As student you have a soft limit at 400 MB of data and a hard limit at 1 GB 1000 MB It is allowed to exceed your soft limit in a limited period at most a week if you exceed it you will be notified and then you have to clean up your home directory so that you will get below your soft limit again If you do not do this within the given time span one week you will not be able to save data to your home directory The hard limit is the upper boundary for how much data you can keep in your home directory it is never possible to exceed this limit
4. Table 1 Printing We use copy machines at ITU that can both print scan and copy All copy machines are connected to the ITU network The basic functionalities are explained in the note User manual for Canon IR2200i and IR3300i at ITU All printers are grouped in two printer queues one for black amp white and one for colour print Students and employees use the same two printer queues To print in black amp white you choose the printer queue print and to print in colour you choose the printer queue colourprint Your print jobs are not sent to printing before you insert your printer card in the card reader on the printer and types in your password On the card reader you choose the print jobs to print Finally there is a special printer that is not a real physical printer On the network it is called pdf and when printing a document to this printer it will convert it to PDF format which can be read by Adobe Acrobat Reader and send the PDF document back to you by email This is an easy way of converting your different types of documents to the common PDF format that takes up little space and amongst other things is well suited for presentation on the Internet Setting up printing depends on whether you are using Linux or Windows Printing from Linux In Linux you print with the command 1pr Most often you give lpr two arguments which printer to send the job to and which file to print You specify the printer with the argument P lt printer
5. ail amp Newsgroups In Linux first open the start menu and click Internet and Mozilla to launch Mozilla and then choose the menu item Mail amp Newsgroups in the menu Tasks You fetch your email by first highlighting your Inbox top left corner of the screen and then clicking the button Get Msg You will now be prompted for your mail password after entering it your email will be retrieved from the mail server Your own home page You will automatically get your own home page when you start as a student or employee at ITU To begin with it will be empty but you are free to design one yourself In your home directory there is a subfolder called public_html and anything you put in here can be seen at http www itu dk people lt user name gt where lt user name gt should be replaced with your user name If you put a file called index html in your public_html folder this file will Sysadm 12 01 2006 3 be loaded automatically when someone visits your home page If you would like to learn some basic HTML skills visit Sysadm s website at http www itu dk sysadm and click the link Hj lp og vejledning and then the link HTML kursus SysAdm January 2005 4 Access from home You can access your data from outside ITU in three different ways Webmail and SSH They each serve different purposes and will be discussed below Webmail is used for reading mail when you are not at ITU The only requirement is that you have access to a
6. computer connected to the Internet and that this computer has a browser installed such as Mozilla or Internet Explorer You start up Webmail by visiting http webmail itu dk Now enter your user name and mail password in the appropriate fields and click the Login button This will bring up a list of your latest received mails your Inbox You can see more mails by clicking the Next link in the lower left part of the screen You read a mail by clicking its subject After doing this you can reply to the mail by clicking Reply or delete it by clicking Delete You return to the list of mails by clicking Message List You write a new mail by clicking Compose At the leftmost part of the screen you can see a list of subfolders in your Inbox for instance Sent and Drafts If you would like to check the contents of these subfolders simply click on them You can delete multiple mails by marking them use the little squares to the left of the From column and then clicking the Delete button and then Expunge Please remember to log out by clicking Sign Out in the upper left part of the screen when you have finished using Webmail SSH Secure Shell SSH is used to establish remote access to a computer to make it seem as if you were sitting in front of it It also encrypts the data flow between the SSH client and the SSH server to increase security SSH provides the user with a text based access to a Unix environment on the remote host this means that
7. gt For instance the command lpr Pprint test ps will send the file test ps toa black amp white printer Keep in mind that the file you print should be either PostScript or pure text Printing from Windows If you want to print from Windows to say printer print choose Print from your Windows application and make sure to select printer print Sysadm 12 01 2006 2 As with disk space there is a quota on your print usage Candidate master and diploma students have a free limit of 667 00 kr throughout the study period Single course students and guest students have a free limit of 167 00 kr each semester any additional prints must be paid by the student himself Extra prints are purchased by setting your print card in one of the two machines in the northeast end of the hall Currently the price is 1 krone for 3 black amp white prints while colour prints are 5 times the black amp white price that is 3 colour prints for 5 kroner The prints will not be deducted from your print account until you press print on the black box by the printer That means that if anything goes wrong with your print job you will not be charged Please note that colour prints are expensive Make sure that you do not print to a colour printer instead of a black amp white printer by accident for instance colourprint instead of print Your free prints also cover any mistaken printing to a colour printer for instance Email and newsgroups
8. ple if you are part of a group called synergy in the spring semester 2003 then from Linux you can list the contents of the group s shared folder with the command 1s import stud share projects_e2003 synergy while in Windows you should navigate to the s drive and then double click the projects_e2003 folder and then the synergy folder Please note that it is perfectly possible to share data through your own home directory as everyone can read from but not write to it The second shared drive is the Temp folder this is the shared directory for temporary data Everyone can save data to this folder but you are only allowed to delete data you have saved here yourself SysAdm reserves the right to clean up the Temp folder by deleting data older than one week so do not regard this as a safe place for your data Also the data in the Temp folder is not backed up See Table 1 for paths to the Temp folder from Linux and Windows respectively Finally the WebShare directory is the shared drive for shared data accessible from the web This shared directory works much like the Share folder mentioned above The only difference is that the data in the WebShare folder can be seen in a browser on the web If for instance a user group has a subfolder in the WebShare directory called synergy the contents of this subfolder can be seen at http www itu dk stud projects_e2003 synergy The path to the WebShare folder in Linux and Windows respectively can be seen in
9. you should have some basic Unix skills to take advantage of SSH To use SSH at ITU you need to get hold of an SSH client Several can be downloaded freely from the Internet Many Linux computers including the ones at ITU comes with an SSH client ready for use To establish a connection to ITU you should specify ssh itu dk as the host Use your user name and mail password as login and password Once the connection has been established you will get a command prompt in your home directory and will be able to execute Unix applications as if you were sitting at the remote computer ITU The IT Department SysAdm January 2006 Sysadm 12 01 2006
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