[manorgy@slicezilla anarchy]$ java -Xmx1500M -Xms1500M -jar minecraft_server.jar nogui
Exception in thread "main" java.awt.HeadlessException:
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
        at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:159)
        at java.awt.Window.<init>(Window.java:432)
        at java.awt.Frame.<init>(Frame.java:403)
        at net.minecraft.LauncherFrame.<init>(LauncherFrame.java:27)
        at net.minecraft.LauncherFrame.main(LauncherFrame.java:158)
        at net.minecraft.MinecraftLauncher.main(MinecraftLauncher.java:13)