Diff for "VirtualExam"

Differences between revisions 8 and 9

Virtual Exam

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 <prac_name>
- set up a standard virtual exam environment
priv chown <path_wildcard>
change work directory ownership from 90<uid> to the exam account
needed for access to students' files
after changing ownership, students can't start up 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 the 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 up the exam with the same work directories. create a new work directory.
```
cd ~/exams/18s2supp
mv work work.19dec
mkdir work
chmod 1777 work
```

-  ⇤ ← Revision 8 as of 2019-02-13 07:21:31 → 
  Size: 1643
  Editor: MeichengWhale
  Comment:
+   ← Revision 9 as of 2019-02-13 07:23:39 → ⇥
  Size: 1641
  Editor: MeichengWhale
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 12:
- . needed for access to students files
 . after changing ownership, student can't start up the exam. so, do this only after the exam has finished.
+ . needed for access to students' files
 . after changing ownership, students can't start up the exam. so, do this only after the exam has finished.
 Line 34:
- * after changing ownership of the work directories to the exam account, you can't start up the exam with the same work directories. create a new work directory.
+ * after changing ownership of the work directories to exam account, you can't start up the exam with the same work directories. create a new work directory.