To use the services and workstations maintained by the technical service, an LDAP account at the Institute of Computer Science is required.

Account creation for students

Before setting up a CS LDAP account, students must activate their stu-account using the RZ-PIN.

Freshmen computer science (Bachelor):

Students majoring in computer science get a CS LDAP account at the beginning of their studies via their stu-account after they
- have created a StudiDB account and
- have registered for at least one current freshman course.

All other computer science students (minor subject, master's, teacher training, change of subject):

Otherwise, students can apply for a CS LDAP account as follows:

1. The web form must be filled out with personal information. This form can be reached from every computer in the campus network as well as via the VPN and EDUROAM.
2. After completing the form, students have to prove their student status informally by email from their own stu-account and confirm their application.

The CS LDAP account will be created on the next working day. The successful creation will be confirmed by email. Students use their stu-number and their associated stu-account password to log in. This password can only be reset at the data center.


Other accounts

Employees and Guests of the Institute of Computer Science

For new employees and guests, an account will be created after the respective secretary has filled out the web form. The employee's status is checked with the dean's office. The guest status is checked with the person responsible of the inviting working group.

Employees and guests receive the account credentials in person from the technical service. The password should be changed immediately.

Course accounts

For special courses for which the creation of personal accounts would be too time-consuming (e.g. preliminary courses, teacher training courses) or not desired (e.g. exams), the lecturer can apply for course accounts in advance. This is done informally by email. The following information is required:
- Event name
- Responsible lecturer
- Number of accounts
- Duration with exact deletion date

Software and project accounts

Applying for software or project accounts can be done informally by email. The following information is required:
- Desired login name of the software or project account
- Detailed Name (gcos field) of the software or project
- Initial quota
- Name and working group of the employee responsible for the account
- SSH public key for the first login.

A current employee must be responsible for the account at all times.


Duration / extension

To simplyfy the deletion of accounts that are no longer required, all LDAP accounts are generally valid for one year. The account is always renewed for a further year at the beginning of the winter semester. It will be announced by email in good time before the expiry date how the procedure will work depending on the status and which deadlines must be observed.

Personal accounts of major computer science students (Bachelor, Master) are usually automatically renewed if they have re-registered at the university in due time.

All other students (e.g. minor subject, teacher training, those who have registered late) are requested by email in good time before the expiration date to notify the technical service, if they continue to participate in computer science courses and still need the LDAP account.

Personal accounts of employees are automatically extended according to the respective contract period.

For guest, software and project accounts, a corresponding reply by the responsible person to the email received in good time before the expiry is necessary.

Former students and employees who need their account beyond the term of the contract require an invitation from a working group.



Accounts are blocked immediately after their term has expired and are deleted promptly, including all associated data and on all associated systems.

This is the case, e.g. in the event of de-registration, the expiry of the employment.



All users, who have a personal computer account on one of the workstations administered by Technical Service, only have a limited amount of memory (quota). To find out, how big your quota is, use the system command 'quota -v'. The resulting output often is a little puzzling to users at first. 

Look at this example: 

rechner{hugo} quota -v
Disk quotas for hugo (uid 450):
Filesystem     usage  quota  limit    timeleft  files  quota  limit    timeleft
/home/user_1       0      1      1                  0      1      1            
/home/hugo       974  30000  33000                150   3000   3300            


The only line interesting to you is the one that spots your own computer account name. In this case, the user 'hugo' has a temporarily exceedable quota of 30MB (quota) of which he only uses 974KB (usage). The limit that may not be exceeded on this computer account is 33MB (limit).

The quota of 'hugo' (here: 30MB) can be exceeded for a maximum of 7 days up to the limit (here: 33MB). After this point no opened file can be closed any more, even if the maximal limit has not yet been reached. Now you first need to delete enough files to let the used memory of the computer account (usage) be lower than the quota.

Note: Logging in directly via a console of a workstation computer will not work any more, if no file can be opened and closed any more in the user's user directory. The remote login to a workstation computer via s-protocols (ssh, slogin) will still be possible.

Raising quota

Before asking Technical Service for additional memory space, take care, that no memory space is wasted to unnecessary saved data. Several automatically generated files can be deleted without any plroblems. These are files that are generated when using TeX (e.g.  '*.aux', '*.log', '*.dvi', '*.ps', etc.) or backup files of editors (e.g. '*.BAK', '*~', etc.). When all unnecessary files have been deleted and memory is still insufficient, you can apply for a higher quota.

If you have a computer account on one of the workstations administered by Technical Service, then send an email to admin, including the following data:



user's first name and surname 

current quota

new quota


Especially the last point is of high importance, because memory space is not endless. Staff members are thus prioritizing the need for additional memory and this is only possible, when knowing the reasons for the application. 

Change of password

Students can change the password of stu-accounts in datacenter:  Rechenzentrum.

Employees can use the form below to change the password for a computer science LDAP account. 

Password requirements

  1. at least 12 signs long
  2. not more than two equal signs after each other 
  3. at least five different signs
  4. at least one of the numbers: [0123456789]
  5. at least one small letter: [abcdefghijklmnopqrstuvwxyz]
  6. at least on capital letter: [ABCDEFGHIJKLMNOPQRSTUVWXXYZ]
  7. at least one special character:  [~!@#$%^&*()-_=+[]{}|;:,.<>/?]. Other signs are not accepted. 
  8. The new password needs to differ from the old one in at least three signs. 

This form only works within the network of the university of Kiel. The data is being securely transmitted by a https request.

Form to change your password: 


login name
old password
new password
new password





Help in the event of problems with the CS LDAP account

Please send inquiries regarding the creation / renewal / deletion of accounts to using your stu-email address.