我在虛擬機器上安裝了 ubuntu mate 16.04。直到上次軟體更新為止一切正常。虛擬盒子機器意外關閉，重新啟動後我得到這個圖形：
我還收到 ubuntu-mate-welcome 錯誤（無法識別的文件格式 png）
不用全部重裝怎麼解決？
答案1
我認為最好的解決方案是使用命令重新安裝所有 MATE 元件：
sudo apt-get update
sudo apt-get upgrade
sudo apt-get install -f
sudo dpkg --configure -a
sudo apt-get install --reinstall grub2-themes-ubuntu-mate \
ubuntu-mate-desktop^ ubuntu-mate-artwork ubuntu-mate-default-settings \
ubuntu-mate-icon-themes ubuntu-mate-wallpapers-complete human-theme \
gir1.2-mate-panel libmate-desktop-2-17 libmate-menu2 \
libmate-panel-applet-4-1 libmate-sensors-applet-plugin0 \
libmate-slab0 libmate-window-settings1 mate-accessibility-profiles \
mate-applet-topmenu mate-applets mate-applets-common mate-backgrounds \
mate-control-center mate-control-center-common mate-desktop \
mate-desktop-common mate-desktop-environment-core mate-dock-applet \
mate-gnome-main-menu-applet mate-icon-theme mate-icon-theme-faenza \
mate-indicator-applet mate-indicator-applet-common mate-media \
mate-media-common mate-menu mate-menus mate-netbook \
mate-netbook-common mate-netspeed mate-netspeed-common \
mate-notification-daemon mate-notification-daemon-common \
mate-optimus mate-panel mate-panel-common mate-polkit \
mate-polkit-common mate-power-manager mate-power-manager-common \
mate-screensaver mate-screensaver-common mate-sensors-applet \
mate-sensors-applet-common mate-session-manager mate-settings-daemon \
mate-settings-daemon-common mate-system-monitor \
mate-system-monitor-common mate-terminal mate-terminal-common \
mate-themes mate-tweak mate-user-guide mate-utils mate-utils-common \
plymouth-theme-ubuntu-mate-logo plymouth-theme-ubuntu-mate-text \
python-mate-menu ubuntu-mate-artwork ubuntu-mate-default-settings \
ubuntu-mate-icon-themes ubuntu-mate-libreoffice-draw-icons \
ubuntu-mate-lightdm-theme ubuntu-mate-themes ubuntu-mate-wallpapers \
ubuntu-mate-wallpapers-common ubuntu-mate-wallpapers-complete \
ubuntu-mate-wallpapers-utopic ubuntu-mate-wallpapers-vivid \
ubuntu-mate-wallpapers-wily ubuntu-mate-wallpapers-xenial
我在我的 Ubuntu 16.04.3 LTS MATE 系統上收集了這個清單。
答案2
在更改任何軟體之前，我建議檢查您的設定。您目前使用哪個“外觀”主題？
遇到同樣的問題，我意識到我的 ubuntu 夥伴正在使用「自訂」主題，根本沒有圖示:)
因此，「選單」>「控制中心」>「外觀」>「設定新主題」為我完成了這項工作。
