Today while I was trying to install a new software via software center, my password stopped working, that was strange for me after that situation I tried searching askubuntu.com to reset my user password and came to the solution given here:
and that worked fine, I changed my password successfully. But after that another situation occurred, the password for user root was not working too. I was shocked because yesterday my password for user root and login user both were working fine, so I assumed that my system was hacked. When I tried to change password for root using the above solution, I ended up with "Authentication token manipulation error", I searched again and thanks to AskUbuntu community, I got solution for that too here:
sudo passwd root
Now I need help to secure my Ubuntu Machine. Is there any GUI Application to check the vulnerabilities in my Machine, which can suggest steps to secure it?
Thanks in advance.