How to Prevent Access to Local Machine’s Data

Please excuse the terminology as I’m no expert in information security. My question is pretty straightforward:

How can I guarantee* that I am the only one with access to my local machine’s data (screen, microphone, camera, files)?

* With the assumption that no one will physically come into my apartment and mess with the hardware.

I own a Macbook Pro running macOS. I have heard of cases where a laptop’s data (camera/microphone etc..) has been accessed remotely without consent. I wonder whether it is possible to absolutely prevent such attacks.

Up to recently I thought that the hard drive’s content was safe, but I don’t think so anymore.

The simplest procedure I came up with is turning off the WiFi, reading/writing data to an external drive (like a thumb drive), unplugging the drive (and turning the WiFi back on).

Does the method above guarantee that no one beside me can access the external drive’s data? Are there any easier methods?

Thanks.

LXD Container not accessible from other LAN machines

I am new to Linux world and I tried everything I can think off to solve this problem but stuck since so many days. My LXD container is not able to accessible from my LAN.

I tried followings: https://ubuntu.com/blog/converting-eth0-to-br0-and-getting-all-your-lxc-or-lxd-onto-your-lan https://openschoolsolutions.org/set-up-network-bridge-lxd/ https://discuss.linuxcontainers.org/t/slow-performance-with-nested-bridged-interface/4334 https://blog.simos.info/how-to-make-your-lxd-containers-get-ip-addresses-from-your-lan-using-a-bridge/ https://thomas-leister.de/en/lxd-use-public-interface/

but no help ! Something is wrong and I am not able to make it correct. Any help would be appreciated !!

if I use only bridged profile somehow my container don’t even get the IP, when I do lxc list ipv4 and ipv6 column are blank. I tried to change the container netplan configuration with below and container takes the IP but not able to ping 8.8.8.8 or accessible from host machine.

network: ethernets: eth0: addresses: – 171.17.139.97/28 dhcp4: false gateway4: 171.17.137.81 version: 2

Note – I am using Hyper-V manager and having window 10 host with ubuntu vm 18.04 created by using quick menu.

Thanks

Shrink Kernel Size For 64 MB machines

I’m working on reduction of kernel size in Ubuntu. I’ve compiled and installed the kernel 5.2.3 stable now i want to remove kernel modules manually.

I’ve tried with rmmod command and after rebooting the Ubuntu it appears again in lsmod list.

I want to reduce kernel size so that i can run stably on 64 MB machines? Can someone guide me how can i do this?

Explain structured support vector machines

To understand Structured Support Vector Machines I am reading the following paper: Large Margin Methods for Structured and Interdependent Output Variables. I’ve got one minor question and a bigger one. Both are about the section 2.2.1:

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My question is:

1) Since $ Ψ$ is the a joint feature map $ Ψ(x,y) ≡ Φ(x)⊗Λ^c(y)$ , why is the equation (3) nonlinear?

and:

2) Explain better how one arrive at the equations in (4) starting with constraints in (3).

How does the Mounted Combatant feat interact with Infernal War Machines?

The new Baldur’s Gate – Descent into Avernus hardcover features a brand new mechanic : Infernal War Machines ! A few things caught my eye – first off, that they have a stat block :

An infernal war machine’s statistics function like those for creatures

Then, that their opportunity attack mechanics function a lot like those of mounts :

Infernal war machines provoke opportunity attacks as normal. When an infernal war machine provokes an opportunity attack, the attacker can target the vehicle or any creature riding on or inside if that doesn’t have total cover and is within reach.

Also, that their driver can control their movement much like a mounter controls a (non-intelligent) mount’s movement :

While the vehicle is moving, the driver can steer it along any course.

And that they can make the vehicle Dash/Disengage (in a similar but different manner that a mounter commands a mount to do so) :

As a bonus action, the driver can do one of the following : […] Cause the infernal war machine to take the Dash or Disengage action while the vehicle’s engine is running.

In summary, Infernal War Machines seem similar, in certain points at least, to mounts. What I’m wondering here is : how would a driver with the Mounted Combatant feat interact with these Machines ? Would the feat’s benefits work with the Machines or not ?

Reminder on the Mounted Combatant feat :

You are a adangerous foe while mounted. While you are mounted and aren’t incapacitated, you gain the following benefits :

  • You have advantage on melee attack rolls against any unmounted creature that is smaller than your mount. You can force an attack targeted at your mount to target you instead.
  • You can force an attack targeted at your mount to target you instead.
  • If your mount is subjected to an effect that allows it to make a Dexterity saving throw to take only half damage, it instead takes no damage if it succeeds on the saving throw, and only half damage if it fails.

From a thematic standpoint, I think it would make sense for a specialized “Helldriver”, so to speak, to gain benefits from that feat while driving an Infernal War Machine, but actual-mechanics-wise, I am unsure.

Proof by reduction and Turing machines

This is a practice question I have, but I can’t wrap my head around it. …………. Let L = {M | M is a TM that halts with exactly two words on its tape in the form Bw1Bw2B}. B = Blank Position

the problem of deciding whether an arbitrary Turing machine will accept an arbitrary input, is undecidable. Use this result to prove, formally using problem reduction, that given an arbitrary Turing machine M, the problem of deciding if M ∈ L is undecidable. ………… I have no knowledge of proofs. I don’t have a clue how to tackle this question, can someone point me to a tutorial that works with proofs by reduction along with Turing machines.

Help with Kubuntu / Dolphin samba browsing network, windows and other ubuntu machines

First thank you for taking the time to read this and trying to help me. my main language is not english, i hope you guys can understand me.

I have an small network, 4 windows computers and 4 linux/ubuntu computers, and when i do repairs i join the client’s computers to the network to do backups of install software.

in the computers using ubuntu 18.04, i just install ubuntu, then install samba, add the user smbpasswd -a xxx and voila! in nautilus i can brose the whole network, my other ubuntu computers and windows computers show up, i can just doble clic and proceed to their shared folders. Sometimes i get an errro when double clic to enter the other computer and either i wait a few minutes OR i type smb://computername/folder and i am inside. but at least because al already am selecting the computer i know the name of the computer i am trying to get in.

In kubuntu 18.04 i can NEVER see the network, nothings appears on the dolphin browser, sometimes the other ubuntu computers show up… but the windows ones never!.

In Xubuntu 18.04 they DO show up, but everytime i clic on them to log in their shared folders i always get an error – unable to mount –

i’ve tried the nt=1 thing, but i have no clue why only in ubuntu and in ubuntu mate i can browse the network perfectly and not in kubuntu or in xubuntu.

any idea guys? i am forced to always use ubuntu or ubuntu mate but never kubuntu or xubuntu because this is a deal breaker for me.

thank you again.