Nowadays every attachment is a possible security threat (virus, trojan horse, etc.).
If you you want to minimize the risk of inceftion we advise to scan attachments before opening especially files from unknown senders or unexspected e-mails.
You can do that with the free online virus/malware/URL scanner from VirusTotal where the file is checked by the most common an reliable up to date virus-scanners.
To scan a attachment:
Interpreting the scan result:
If only some (or less) out of the nearly 50 scanners say that the file might be harmful it is normally safe to open the file. The more scanners detect a threat the more dangerous it is to open the file. In case you are not sure don't hesitate to contact the helpdesk.
Be aware if the email
Communicate personal information only via phone or secure web sites: look for a sign that the site is secure such as a lock icon on the browser’s status bar or a “https:” URL whereby the “s” stands for “secure” rather than a “http:”.
Also, beware of phone phishing schemes. Do not divulge personal information over the phone unless you initiated the call. Be cautious of emails that ask you to call a phone number to update your account information as well.
Never email personal or financial information, even if you are close with the recipient. You never know who may gain access to your email account, or to the person’s account to whom you are emailing.
Links, attachments, file download
Do not click on links, download files or open attachments in emails from unknown senders. It is best to open attachments only when you are expecting them and know what they contain, even if you know the sender.
Be aware of pop ups and
Open the Windows-Explorer and right click on the drive letter and select properties. The window shows how much space is left among other drive information.
When you issue the disk free command (
df -h $HOME) in a command-line terminal, the output does not show the whole disk space available on the NFS-Shares but your quota. I.e. under "Size" you will see your hard quota and under "Used" you will see the amount of space you are currently using.
Please note: The usual quota command does not work together with our storage system. It will have no output when you execute it.
Restoring files on your own only works for the faculty storage which is usually the "u:"-drive on windows machines or the home directory on linux machines.
Windows (faculty storagespace)
Linux (faculty storagespace)
Restoring files can only be done on a Windows computer which is located in the meeting room on the third floor. Please use this computer and follow the above instructions.
Restoring files from ZID fileservices
To restore files on ZID storagespace you have to write an e-mail to the ZID-Helpdesk containing following information:
Please call our hotline (+43-1-4277-50685) immediately to prevent further contamination and possible loss of data. Do not ignore such warnings and don’t try to solve the problem on your own.
lpadmin -E -p PRINTER
(replace PRINTER with your printer’s name, normally “followme”). You may view the current printer status by executing
lpq -P PRINTER
(or in your application’s graphical printer dialog). If the lpadmin command does not work, please also try
If your printer still refuses to work, please contact the Helpdesk (including your printer’s name and location).
Note that by default our copiers are configured to wait for additional sheets of paper when scanning using the original glass as if the option “Separate Scan” is on!
If you put all your sheets into the automatic document feeder, everything will automatically be put into one output file. If you have more than 100 sheets, you have to enable the “Separate Scan” option, see the instructions at Scanning a number of originals ([Separate Scan]) (german).
If you print a document within a web browser, you might not achieve optimal print quality. It can happen that the printout is blurry, that a font is replaced by another one (of a different size) and that forms look different. Because of this we recommend that you download the file first and then print it with other software.
Since the only available paper size at the department is A4 and A3, please do not send print jobs requesting another paper size (if you do not intend to bring this exact paper with you)!
Thus, choose A4 (or A3) in the printer menu and do not use the option ‘Choose paper source by pdf page size’ in Adobe Reader, since many documents (e.g. research papers) have other dimensions.
In the meeting room on the third floor, there's a Windows computer with Microsoft Office and Adobe Acrobat Prof. installed (in addition to the standard installation). Please feel free to use it. You can log in with your u:account (=mailbox-account).
For more information on our Windows computers see this page.
Please bring your Laptop at least every 2 months or use VPN to get software updates which are important for the security of your laptop.
To get the latest updates you have to right-click the "Matrix 42" icon (square with smaller red squares in it, located in the tray icon bar) and select "Check for new approved Software". The Software will download in the background and can take a long time depending on the size. So if you connect from the outside please make sure to have a sufficient internet connection.
If the software was downloaded correctly and you restart your computer you will see a window showing Matrix 42. Please do not log in and let the installation finish. The installation can take up to an hour depending on the software downloaded before.
If the software is not included in Ubuntu Linux, but there exists a third-party Ubuntu package repository including the software, we may be able to install it. Please send a detailed request to the Helpdesk, at least including the software's name and where we can find it.
If the software is not included in Ubuntu Linux and there is no Ubuntu package for it, we don't support a global installation to your PC. You may try to install it to your home directory yourself, so the software will survive reinstallation of your computer.
Note: One special case is Maple. It is not included on your computer by default (because of a limited number of licenses), but we will install it if you need it. Please send a request including your computer's name (enter "hostname" in a command-line terminal) to the Helpdesk.
It looks like Firefox/Thunderbird did not exit correctly last time you used it or an instance is still running in the background.
remove-mozilla-locks.sh from a terminal window. This should fix the problem.
Unfortunately, sometimes Firefox loses user bookmarks when it crashes, or when it gets upgraded to a newer release in the background while still running.
Usually you can restore an earlier (working) version of the bookmarks yourself: Please open Firefox (if it is not running already). From the menu bar, choose "Bookmarks" -> "Show All Bookmarks". Choose "Import and backup", then under "Restore" you will find a list of dates when the bookmarks were backed up by Firefox. Click on a recent date (the most recent backup will usually be the best option). A dialog will appear, asking if you want to replace the bookmarks. Click "OK" there. Now please restart Firefox and your bookmarks should be available again.
Under rare circumstances, this procedure does not suffice to restore the bookmarks. In this case, the computer group can restore an older Firefox profile for you from the storage backup. Please contact the Helpdesk (don't forget to include your username, and, if possible, your computer's name, in the request)!