Final tasks
General steps
- Fill Bootcamp feedback form using link you received in you mailbox
- Remove private data
- Optional approach to remove private data
Fill Bootcamp feedback form using link you received in you mailbox
Remove private data
Open terminal and execute commands:
sudo su
dd if=/dev/zero of=/dev/sda bs=8M count=1
dd if=/dev/zero of=/dev/sda bs=8M count=1
Optional approach to remove private data
Delete user folder
- Logoff out of graphical session
- Press Ctrl+Alt+F1 to activate text console
- Log in as student with his password
Execute following commands in command line:
sudo su
cd /
rm -rf /home/student
mkdir /home/student
chown student:student /home/student
exit
exit
- Press Ctrl+Alt+F7 (or ..F8, ..F9 etc.) to switch to graphical console
- Log in as student and check that default look is successfully restored
Fill empty space with zeroes
After files are deleted from file system entries, actual file content remains in disk. Therefore file content can be (at least, partially) recovered. To avoid this, you can write zeroes in all free space. Note that depending on disk speed and free space it can take x hours to execute, therefore you can leave computer doing work and switch it off when it is done with a command as a root user:
dd if=/dev/zero of=zero.file bs=1024 status=progress; rm zero.file; shutdown -P now