====== Auto Login ======

===== Introduction =====

This document mainly introduces automatic login under Ubuntu.


===== Desktop OS =====


Edit file ''/usr/share/lightdm/lightdm.conf.d/50-greeter-wrapper.conf'' to add the configuration below:

```
[SeatDefaults]
greeter-session=lightdm-gtk-greeter
autologin-user=khadas
```

===== Server OS =====

**For tty1-tty6**:

```shell
sudo cp /lib/systemd/system/getty@.service /lib/systemd/system/getty@.service.backup
sudo sed -i "s/ExecStart=.*/ExecStart=-\/sbin\/agetty --noclear --autologin root \%I \$TERM/g" /lib/systemd/system/getty@.service
```

**For ttyS0**:

```shell
sudo cp /lib/systemd/system/serial-getty@.service /lib/systemd/system/serial-getty@.service.backup
sudo sed -i "s/ExecStart=.*/ExecStart=-\/sbin\/agetty --autologin root --keep-baud 115200,38400,9600 \%I \$TERM/g" /lib/systemd/system/serial-getty@.service
```

<WRAP info >
Reboot to take effect.
</WRAP>

<WRAP tip >
If you want to recovery the login prompt, please follow the steps below:
```shell
sudo mv /lib/systemd/system/getty@.service.backup /lib/systemd/system/getty@.service
sudo mv /lib/systemd/system/serial-getty@.service.backup /lib/systemd/system/serial-getty@.service
```
</WRAP>