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Ubuntu 開機過程其實是可以更換圖片的，甚至已經提供了不少佈景主題可以使用：apt-cache search plymouth-theme

plymouth-theme-ubuntu-logo - graphical boot animation and logger - ubuntu-logo theme
plymouth-theme-ubuntu-text - graphical boot animation and logger - ubuntu-logo theme
mythbuntu-default-settings - default settings for Mythbuntu
plymouth-theme-edubuntu - Plymouth is an application that runs very early
plymouth-theme-fade-in - graphical boot animation and logger - fade-in theme
plymouth-theme-glow - graphical boot animation and logger - glow theme
plymouth-theme-kubuntu-logo - graphical boot animation and logger - kubuntu-logo theme
plymouth-theme-kubuntu-text - graphical boot animation and logger - kubuntu-text theme
plymouth-theme-lubuntu-logo - plymouth theme for Lubuntu
plymouth-theme-lubuntu-text - plymouth text theme for Lubuntu
plymouth-theme-sabily - plymouth theme for Sabily (graphical theme)
plymouth-theme-sabily-text - plymouth theme for Sabily (text theme)
plymouth-theme-script - graphical boot animation and logger - script theme
plymouth-theme-solar - graphical boot animation and logger - solar theme
plymouth-theme-spinfinity - graphical boot animation and logger - spinfinity theme
plymouth-theme-text - graphical boot animation and logger - text theme
plymouth-theme-ubuntu-gnome-logo - graphical boot animation and logger - ubuntu-gnome-logo theme
plymouth-theme-ubuntu-gnome-text - graphical boot animation and logger - ubuntu-gnome-text theme
plymouth-theme-ubuntustudio - Ubuntu Studio Plymouth theme
plymouth-theme-xubuntu-logo - graphical boot animation and logger - xubuntu-logo theme
plymouth-theme-xubuntu-text - graphical boot animation and logger - xubuntu-text theme

你可以使用 apt-get install 來安裝，這些佈景主題會被安裝到 /lib/plymouth/themes/ 目錄下，安裝以後，該如何使用呢? 可以用 update-alternative 來替換，在 terminal 輸入 sudo update-alternative default.plymouth 以後，就可以選擇你喜愛的佈景主題了。
網路上也有人自行去修改 theme，調整字的位置、圖形等等的，用 ubuntu plymouth 去找，就可以找到相關的資訊了。