How to install SDDM on Linux?

To install SDDM (Simple Desktop Display Manager) on Linux, you typically use your distribution's package manager. Here’s how you can do it on some popular distributions:

On Ubuntu/Debian-based systems:

Update your package list:
```
sudo apt update
```
Install SDDM:
```
sudo apt install sddm
```
Enable SDDM to start at boot:
```
sudo systemctl enable sddm
```
Start SDDM:
```
sudo systemctl start sddm
```

On Fedora:

Install SDDM:
```
sudo dnf install sddm
```
Enable SDDM to start at boot:
```
sudo systemctl enable sddm
```
Start SDDM:
```
sudo systemctl start sddm
```

On Arch Linux:

Install SDDM:
```
sudo pacman -S sddm
```
Enable SDDM to start at boot:
```
sudo systemctl enable sddm
```
Start SDDM:
```
sudo systemctl start sddm
```

Example:

If you are using Ubuntu, after updating your package list, you would run:

sudo apt install sddm

This command installs SDDM. After installation, you enable it to start at boot with:

sudo systemctl enable sddm

And start it immediately with:

sudo systemctl start sddm

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