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=== Work in Progress or Draft only ===
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 * ~give/stable/bin/prac_install_vx <prac_name>  * ~give/stable/bin/prac_install_vx <from_prac> <to_prac>
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   if <from_prac> != <to_prac>
      copy <from_prac> from virtual directory if exists
      copy <from_prac> from gaol directory otherwise
   else
      copy <from_prac> from gaol directory

 * priv passwd
   . change the vxN (eg vx6) password before and after the exam with this script
   . add the class account public key to the exam account (eg cs2521exam)
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   change work directories ownership from 90<uid> to the exam account
   needed to access the students files
   . change work directory ownership from 90<uid> to the exam account to access students' files
   . after changing ownership, students can't start the exam. so, do this only after the exam has finished.
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 . The script will output the files that are missing from the config files    . script will output files that are missing from the config files

 * dpkg-query, apt-cache depends
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 * when the exam crashes after you authenticated with your zid, check the stderr.log file in <exam_account>/var directory. Look at the latest directory.  * when the exam crashes after you authenticated with your zid, check the stderr.log file under <exam_account>/var directory. Look at the latest directories.
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 * after chown-ing the work directories to the exam account, you can't start up the exam with the same work directories.
 {{{
 * after changing ownership of the work directories (to exam account), you can't start the exam with the same work directories.
   * create a new toplevel work directory.
   
{{{
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 }}}    }}}
   * or remove the student's work directory
   {{{
cd ~/exams/18s2supp/work
priv chown z5555555
rm -r z5555555
   }}}

Virtual Exam

Work in Progress or Draft only

Please read the documentation of virtual exam

/!\ The way the virtual exam white listed software (etc/vx.conf) will be rewritten early in Term 1 to better cope with software changes on CSE computers.

Useful scripts

  • ~give/stable/bin/prac_install_vx <from_prac> <to_prac>

    • set up a standard virtual exam environment

      if <from_prac> != <to_prac>

      • copy <from_prac> from virtual directory if exists copy <from_prac> from gaol directory otherwise

      else
      • copy <from_prac> from gaol directory

  • priv passwd
    • change the vxN (eg vx6) password before and after the exam with this script
    • add the class account public key to the exam account (eg cs2521exam)
  • priv chown <path_wildcard>

    • change work directory ownership from 90<uid> to the exam account to access students' files

    • after changing ownership, students can't start the exam. so, do this only after the exam has finished.
  • ~give/stable/bin/vx-conf-product.pl
    • strace the command
    • feed the output of strace to this script
    • add vx.conf files as arguments
    • script will output files that are missing from the config files
  • dpkg-query, apt-cache depends

Tips

  • when the exam crashes after you authenticated with your zid, check the stderr.log file under <exam_account>/var directory. Look at the latest directories.

    marimba % ls -lt ~/var | head -5
    total 988
    drwxr-xr-x 2 cs9024exam cs9024exam 4096 Feb 13 06:59 marimba-25528
    drwxr-xr-x 2 cs9024exam cs9024exam 4096 Feb 12 20:49 wagner-7800
    drwxr-xr-x 2 cs9024exam cs9024exam 4096 Feb 12 20:33 vx4-45795
    drwxr-xr-x 2 cs9024exam cs9024exam 4096 Feb 12 18:39 vx4-34624
  • after changing ownership of the work directories (to exam account), you can't start the exam with the same work directories.
    • create a new toplevel work directory.
      cd ~/exams/18s2supp
      mv work work.19dec
      mkdir work
      chmod 1777 work
    • or remove the student's work directory
      cd ~/exams/18s2supp/work
      priv chown z5555555
      rm -r z5555555

VirtualExam (last edited 2022-10-25 16:12:21 by MeiChengWhale)