I did it and went on to the next step but it says now that such a folder or file does not exist,

You've installed the sysklogd and klogd packages, rebooted, and started the sysklogd process, then you're running "cat /dev/null > /var/log/syslog"?

Ohh my, you are going to have to give me some time to digest your question. I am not technical. Let me run through the whole thing again, step by step.

I executed the sudo gainroot and then the cat/dev/null>/var/log/syslog but I got the reply: cannot create, permission denied.

Did the prompt change after you ran "sudo gainroot" (do you have the rootsh package installed)?

it just showed the prompt again. As for the rootsh package, I do not know.

run terminal, type "root" then type "whoami"

if it says root, try the above code again.

when I typed root, it said not found.

When I typed whoami, it responded just with "user"

Try doing the "sudo gainroot" then typing whoami.

Once you get root, then you should be able to continue with the above command, or there's a different problem.