Author Archives: mYnDstrEAm

How does Thunderbird quarantine downloaded emails? Is it dangerous to download emails and store them offline?

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There shouldn’t be a high security risk as long as the email attachments aren’t opened / executed by the user but it could still be a risk and maybe I’m wrong.

So how does Thunderbird quarantine email attachments? (For examp… Continue reading How does Thunderbird quarantine downloaded emails? Is it dangerous to download emails and store them offline?→

What’s a secure way to prompt for a password and erase the cached password afterwards in Linux?

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So I have multiple hard drives encrypted with the same password and instead of having to enter it multiple times I’d like to have it set up so that after booting I automatically get a password-box displayed into which I enter… Continue reading What’s a secure way to prompt for a password and erase the cached password afterwards in Linux?→

resolv.conf: my router acts as a nameserver – a vulnerability? How to change it?

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I’m running Debian 9.1 with KDE and when connecting to the Internet by default I get these two lines in my /etc/resolv.conf file:

search localdomain
nameserver {ipofmyrouter}

I guess that these – or at least “nameserver {… Continue reading resolv.conf: my router acts as a nameserver – a vulnerability? How to change it?→

Would it add security to set a GRUB password if HDDs are encrypted and UEFI settings can be opened anyway?

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So I’m using Debian 9.1 with KDE and have my hard drives encrypted. Now I’m wondering whether to additionally add a GRUB password as described here.

Would that make sense? As the hard drives are encrypted nobody should be ab… Continue reading Would it add security to set a GRUB password if HDDs are encrypted and UEFI settings can be opened anyway?→

/etc/sudoers file with permissions set to 640 instead of 0440: what does it mean?

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So I’m still new to GNU/Linux: recently I installed Debian 9.1 with KDE. Now after executing:
stat –format ‘%a’ /etc/sudoers
I found out that my sudoers file has the 640 permissions instead 0440 set. I changed this by running pkexec chmod… Continue reading /etc/sudoers file with permissions set to 640 instead of 0440: what does it mean?→

How to find & delete files which have been deleted from disk but whose file handle hasn’t been closed in Debian?

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I’m using Debian 9.1 with KDE and would like to run automatic search-and-deletions to fully delete all files “which have been deleted but whose file handle hasn’t been closed”.

I’m still new to GNU/Linux and I’ve read that s… Continue reading How to find & delete files which have been deleted from disk but whose file handle hasn’t been closed in Debian?→