Ahoy，每当我尝试从终端以 root 身份运行 Pycharm 时：
sudo charm
返回此错误：
seth@pixel:~/programming/python/Spoofenschmirtz-Evil-incARPorated$ sudo charm
Start Failed: Failed to initialize graphics environment
java.awt.AWTError: Can't connect to X11 window server using '127.0.0.1:0.0' as the value of the DISPLAY variable.
at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
at sun.awt.X11GraphicsEnvironment.access$200(X11GraphicsEnvironment.java:65)
at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:115)
at java.security.AccessController.doPrivileged(Native Method)
at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:74)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at java.awt.GraphicsEnvironment.createGE(GraphicsEnvironment.java:103)
at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:82)
at sun.awt.X11.XToolkit.<clinit>(XToolkit.java:128)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at java.awt.Toolkit$2.run(Toolkit.java:860)
at java.awt.Toolkit$2.run(Toolkit.java:855)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:854)
at java.awt.Toolkit.getEventQueue(Toolkit.java:1734)
at java.awt.EventQueue.isDispatchThread(EventQueue.java:1049)
at javax.swing.SwingUtilities.isEventDispatchThread(SwingUtilities.java:1361)
at javax.swing.text.StyleContext.reclaim(StyleContext.java:454)
at javax.swing.text.StyleContext.addAttribute(StyleContext.java:311)
at javax.swing.text.html.StyleSheet.addAttribute(StyleSheet.java:578)
at javax.swing.text.StyleContext$NamedStyle.addAttribute(StyleContext.java:1501)
at javax.swing.text.StyleContext$NamedStyle.setName(StyleContext.java:1312)
at javax.swing.text.StyleContext$NamedStyle.<init>(StyleContext.java:1259)
at javax.swing.text.StyleContext.addStyle(StyleContext.java:107)
at javax.swing.text.StyleContext.<init>(StyleContext.java:87)
at javax.swing.text.html.StyleSheet.<init>(StyleSheet.java:166)
at javax.swing.text.html.HTMLEditorKit.getStyleSheet(HTMLEditorKit.java:391)
at com.intellij.util.ui.UIUtil.<clinit>(UIUtil.java:103)
at com.intellij.ide.plugins.PluginManager.start(PluginManager.java:78)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.ide.Bootstrap.main(Bootstrap.java:39)
at com.intellij.idea.Main.main(Main.java:78)
我尝试运行gksu，得到了这个：
(gksu:23822): Gtk-WARNING **: cannot open display: 127.0.0.1:0.0
同样，当我运行使用 Tkinter 的 python 项目时：
No protocol specified
No protocol specified
Traceback (most recent call last):
File "Main.py", line 11, in <module>
root = Tk()
File "/usr/lib/python3.6/tkinter/__init__.py", line 2020, in __init__
self.tk = _tkinter.create(screenName, baseName, className, interactive, wantobjects, useTk, sync, use)
_tkinter.TclError: couldn't connect to display ":0"
当我运行时sudo gedit：
No protocol specified
Unable to init server: Could not connect: Connection refused
(gedit:4723): Gtk-WARNING **: cannot open display: :0
我正在运行 Ubuntu Gnome 17.10，并且我正在使用笔记本电脑，如果相关的话，只运行外部显示器。