Disable Admin Password in Linux Mint (A–Z Guide)

This guide explains how to disable the admin (sudo) password prompts in Linux Mint, for both terminal commands and graphical (GUI) actions.

⚠️ WARNING: Disabling admin passwords lowers system security! Anyone with access can change system settings, install/remove software, or damage the system without restriction. Only do this if you fully understand the risks.

1️⃣ Allow sudo Without Password

Open the terminal.
Edit the sudoers file by running:
```
sudo visudo
```
Look for this line:
```
%sudo   ALL=(ALL:ALL) ALL
```
and change it to:
```
%sudo   ALL=(ALL:ALL) NOPASSWD:ALL
```
Alternatively, add this at the bottom (replace yourusername with your actual username):
```
yourusername ALL=(ALL) NOPASSWD:ALL
```
Save and exit:
- If using nano, press Ctrl + O (then Enter), then Ctrl + X.

2️⃣ Disable Password for GUI Actions (polkit)

Check if the directory exists:
```
ls /etc/polkit-1/localauthority/
```

If you don’t see 50-local.d, create it:

sudo mkdir /etc/polkit-1/localauthority/50-local.d

Create the policy file:

sudo nano /etc/polkit-1/localauthority/50-local.d/disable-password.pkla

Add the following content:

[Disable password for admin]
Identity=unix-group:sudo
Action=*
ResultActive=yes

Save and exit (in nano: Ctrl + O, Enter, Ctrl + X).
Reboot your system:
```
sudo reboot
```

3️⃣ (Optional) Enable Automatic Login

Go to Menu → Administration → Login Window.
In the Users tab, select your user account.
Enable Automatic Login.
Reboot to apply.

✅ Summary

Sudo without password: Edit sudoers file.
GUI admin without password: Add a polkit rule in /etc/polkit-1/localauthority/50-local.d/.
Auto-login: Enable via Login Window settings.

⚠️ Important Reminder: Disabling admin passwords makes your system less secure. Only apply these changes if you’re sure you need them.

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