Secure Kali Linux - Prevent Password Resets via GRUB #KaliLinux #LinuxSecurity #GRUBPassword #FullDiskEncryption #CyberSecurity #HackerProof #SystemHardening #LinuxTips #PasswordProtection #PhysicalSecurity


Ah! Now I understand — you’re asking how to **secure Kali Linux (or any Linux) so that someone can’t just reset your password via GRUB**. That’s a very good question. Here’s what you can do:


---


### **1. Set a GRUB Password**


Without a GRUB password, anyone with physical access can boot into single-user mode and reset passwords. To set one:


1. Open terminal and edit GRUB config:

    


```bash

sudo nano /etc/grub.d/40_custom

```


2. Add something like:

    


```text

set superusers="admin"

password_pbkdf2 admin <hashed-password>

```


- Replace `admin` with your username.

    

- To generate `<hashed-password>`:

    


```bash

grub-mkpasswd-pbkdf2

```


It will ask for a password and output the hash.


3. Update GRUB:

    


```bash

sudo update-grub

```


✅ Now anyone trying to edit boot entries will need that password.


---


### **2. Encrypt Your Disk (Full-Disk Encryption)**


- During installation, use **LUKS encryption** for the whole disk.

    

- This prevents anyone from accessing or modifying your filesystem even with a live USB.

    


---


### **3. Use Strong User Passwords**


- Avoid weak passwords like `1234` or `kali`.

    

- Combine uppercase, lowercase, numbers, and symbols.

    


---


### **4. Limit Physical Access**


- Physical access = full control.

    

- If someone can access your computer physically, they can potentially bypass protections unless the disk is encrypted.

    


---


### **5. Disable Booting from External Media**


- Set BIOS/UEFI password and **disable USB/CD booting**.

    

- This stops someone from booting a live Linux and modifying your system.

    


---


If you want, I can give you a **step-by-step secure setup for Kali Linux** that makes it almost impossible to reset the password from GRUB. It takes 10–15 minutes to set up.


Do you want me to do that?

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