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linux: added greeters to lightdm
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@ -8,6 +8,12 @@ It is available for both [X](/wiki/linux/x_window_system.md) and Wayland.
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On most linux distributions LightDM can be installed with the `lightdm` package.
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Additionally `lightdm-gtk-greeter` and `xorg-server-xephyr` are recommended.
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This setup will work with [LightDM-GTK-Greeter](#lightdm-gtk-greeter) which is the default
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[greeter](#greeters) but others may be chosen.
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If that is the case `lightdm-gtk-greeter` does not have to be installed, but another one.
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For a guide on how to set the greeter navigate to the [greeter section](#greeters).
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This section will also discuss various other greeters like the
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[LightDM-Mini-Greeter](#lightdm-mini-greeter).
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This setup needs an `xsession`.
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An alternative to this is using `xinitrc` as an `xsession`.
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@ -38,3 +44,129 @@ system.
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systemctl enable lightdm.service`
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reboot
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```
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## Greeters
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LightDM features the option to choose between many different greeters.
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This section focusses on various greeters.
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The greeter can be set with the option `greeter-session` under the section `[Seat:*]` in the file
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`/etc/lightdm/lightdm.conf`.
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This will look similar to the following line.
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```txt
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[Seat:*]
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greeter-session=lightdm-mini-greeter
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```
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If no `greeter-session` is set the default will fall back to the
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[LightDM-GTK-Greeter](#lightdm-gtk-greeter).
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### LightDM-GTK-Greeter
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The [LightDM-GTK-Greeter](https://github.com/Xubuntu/lightdm-gtk-greeter) is the default greeter
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for LightDM.
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### LightDM-Mini-Greeter
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[LightDM-Mini-Greeter](https://github.com/prikhi/lightdm-mini-greeter) is a minimal greeter.
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For the LightDM-Mini-Greeter to work correctly some settings have to be set in the file
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`/etc/lightdm/lightdm-mini-greeter.conf`.
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The following lines show an example of this file.
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The most important changes have been done to set the `user` under `[greeter]`
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and `background-image` under `[greeter-theme]`.
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The background image path can vary, but lightdm has to be able to access the
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image.
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```txt
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# LightDM Mini Greeter Configuration
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#
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# To test your configuration out, run: lightdm --test-mode
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[greeter]
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# The user to login as.
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user = user
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# Whether to show the password input's label.
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show-password-label = true
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# The text of the password input's label.
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password-label-text = Password:
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# The text shown when an invalid password is entered. May be blank.
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invalid-password-text = Invalid Password
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# Show a blinking cursor in the password input.
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show-input-cursor = true
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# The text alignment for the password input. Possible values are:
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# "left", "center", or "right"
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password-alignment = left
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# The number of characters that should fit into the password input.
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# A value of -1 will use GTK's default width.
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# Note: The entered width is a suggestion, GTK may render a narrower input.
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password-input-width = -1
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# Show the background image on all monitors or just the primary monitor.
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show-image-on-all-monitors = false
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[greeter-hotkeys]
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# The modifier key used to trigger hotkeys. Possible values are:
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# "alt", "control" or "meta"
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# meta is also known as the "Windows"/"Super" key
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mod-key = meta
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# Power management shortcuts (single-key, case-sensitive)
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shutdown-key = s
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restart-key = r
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hibernate-key = h
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suspend-key = u
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[greeter-theme]
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# A color from X11's `rgb.txt` file, a quoted hex string(`"#rrggbb"`) or a
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# RGB color(`rgb(r,g,b)`) are all acceptable formats.
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# The font to use for all text
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font = "Sans"
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# The font size to use for all text
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font-size = 1em
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# The font weight to use for all text
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font-weight = bold
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# The font style to use for all text
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font-style = normal
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# The default text color
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text-color = "#eeeeee"
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# The color of the error text
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error-color = "#F8F8F0"
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# An absolute path to an optional background image.
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# The image will be displayed centered & unscaled.
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# Note: The file should be somewhere that LightDM has permissions to read
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# (e.g., /etc/lightdm/).
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background-image = "/etc/lightdm/background.jpg"
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# The screen's background color.
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background-color = "#0e0f14"
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# The password window's background color
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window-color = "#282828"
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# The color of the password window's border
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border-color = "#555a63"
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# The width of the password window's border.
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# A trailing `px` is required.
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border-width = 2px
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# The pixels of empty space around the password input.
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# Do not include a trailing `px`.
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layout-space = 15
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# The character used to mask your password. Possible values are:
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# "-1", "0", or a single unicode character(including emojis)
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# A value of -1 uses the default bullet & 0 displays no characters when you
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# type your password.
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password-character = -1
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# The color of the text in the password input.
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password-color = "#eeeeee"
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# The background color of the password input.
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password-background-color = "#282828"
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# The color of the password input's border.
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# Falls back to `border-color` if missing.
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password-border-color = "#282828"
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# The width of the password input's border.
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# Falls back to `border-width` if missing.
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password-border-width = 2px
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# The border radius of the password input.
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password-border-radius = 0.341125em
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```
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