Diff for "VirtualExam"

Differences between revisions 12 and 13

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 <prac_name>
- set up a standard virtual exam environment
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
- for access to 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 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 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 12 as of 2019-02-13 10:32:47 → 
  Size: 1799
  Editor: MeichengWhale
  Comment:
+   ← Revision 13 as of 2019-02-13 11:32:31 → ⇥
  Size: 1857
  Editor: MeichengWhale
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 2:
+=== Work in Progress or Draft only ===
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+Line 11:
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+Line 13:
-   . change the vxN password before and after the exam with this script
   . add the class account public key to the exam account
+   . 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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+Line 18:
-   . 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.
+   . for access to students' files
   . after changing ownership, students can't start the exam. so, do this only after the exam has finished.
-Line 25:
+Line 28:
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+Line 41:
- * 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.
+ * after changing ownership of the work directories (to exam account), you can't start the exam with the same work directories. create a new work directory.