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Questions tagged [ubuntu]

Ubuntu is a Linux version derived from Debian. For questions about Ubuntu that are not about security, please post on [AskUbuntu.SE].

Ubuntu is a Linux version, derived from Debian. Ubuntu is licensed under the GPL, but it's development is in the hands of Canonical, Ltd, in the UK.

Use this tag for questions about security aspects of Ubuntu.
If your question is about another aspect of Ubuntu, you can ask it on Ask Ubuntu.
If your question is about Unix or Linux in general, and not about a security aspect of Unix or Linux, you can ask it in Unix & Linux.

The official site of Ubuntu is http://www.ubuntu.com .

314 questions
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6 answers

Why is disabling root necessary for security?

This page on server hardening claims: Disabling the root account is necessary for security reasons. Why is disabling the root account necessary for security reasons?
Randomblue
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4
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3 answers

Can hackers access my webcam?

Can hackers gain access to a webcam without turning the webcam on? Can this be done on Ubuntu?
CatCoder
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2
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0 answers

Can a pure external disk be a threat to Ubuntu computer

I bought a used external disk and now I wonder if any threats can occur from this. Its a disk without casing, so I'am using my own USB adapter. Is there anything else I should take care of when I connect the disk first time? Iam using Ubuntu 16.04
Jekoula
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Is it safe to download and test EICAR test file

I need a sample malicious file that I can work with but does not harm my system. When I checked through the internet I found there is a file called EICAR test file. I am using Ubuntu 16.04 LTS. Can I safely use this? These are the references I…
Avin Mathew
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1 answer

Maintaining root SSH access on Linux Ubuntu even after losing it?

Consider I have root ssh access to a Linux server (Ubuntu 18.04 LTS). What is the best way to maintain access even after losing ssh access? Are there any tools out there to help maintaining stealthiness and access(root)?
FreeMind
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1 answer

Disable guest access in / directory Ubuntu

Follow up from: https://stackoverflow.com/questions/49703000/how-to-see-into-guest-account-filesystem-from-root I am root, and I need to restrict write or read access to / directory for a certain user, that is not root. Is this possible via shell or…
udpcon
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3 answers

Fail2Ban keeps sending me logs of user banned, is someone trying to hack me?

I installed and configured fail2ban on my VPS a couple days ago, since installed, it keeps sending me emails saying that an IP was banned after failed login attempts. Firewall is on and fail2ban is running, ban time is 1 hour, but apparently the ip…
sigmaxf
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