[TOC] ## 問題 啟動虛擬機后，是字符界面，Ctrl+Alt+ F7無法進入圖形界面。 使用startx命令也無法啟動 ``` /etc/X11/xinit/xserverrc: line 3: /usr/bin/X: No such file or directory /etc/X11/xinit/xserverrc: line 3: exec: /usr/bin/X: cannot execute: No such file or directory xinit: giving up xinit: unable to connect to X server: Connection refused xinit: server error ``` 解決辦法 ``` sudo apt-get update sudo apt-get install xserver-xorg sudo apt-get install ubuntu-desktop ``` 錯誤提示如下所示： ``` $ sudo apt update Hit:1 http://security.ubuntu.com/ubuntu bionic-security InRelease Hit:2 http://ca.archive.ubuntu.com/ubuntu bionic InRelease Hit:3 http://ca.archive.ubuntu.com/ubuntu bionic-updates InRelease Hit:4 http://ca.archive.ubuntu.com/ubuntu bionic-backports InRelease (appstreamcli:15814): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed (appstreamcli:15814): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed (appstreamcli:15814): GLib-CRITICAL **: g_strchug: assertion 'string != NULL' failed (appstreamcli:15814): GLib-CRITICAL **: g_strchomp: assertion 'string != NULL' failed AppStream cache update completed, but some metadata was ignored due to errors. Reading package lists... Done Building dependency tree Reading state information... Done 1675 packages can be upgraded. Run 'apt list --upgradable' to see them. ``` 解決方案： ``` sudo sed -i -e 's/bionic/xenial/g' /etc/apt/sources.list ```