在安裝KVM時，為了友善後期安裝虛拟機，直接安裝了GNOME Desktop，這樣可以直接桌面型操作管理，在安裝KVM相關控件後，啟動vncserver報錯，如下：
[root@localhost home]# systemctl status -l vncserver@:1.service
● vncserver@:1.service - Remote desktop service (VNC)
Loaded: loaded (/usr/lib/systemd/system/vncserver@:1.service; enabled; vendor preset: disabled)
Active: inactive (dead) since 二 2019-07-30 10:01:37 CST; 7min ago
Main PID: 10855 (code=exited, status=0/SUCCESS)
7月 30 10:01:34 localhost.localdomain systemd[1]: Starting Remote desktop service (VNC)...
7月 30 10:01:37 localhost.localdomain systemd[1]: Started Remote desktop service (VNC).
[root@localhost home]# vncserver
New 'localhost.localdomain:1 (root)' desktop is localhost.localdomain:1
Starting applications specified in /root/.vnc/xstartup
Log file is /root/.vnc/localhost.localdomain:1.log
通過檢視日志分析：
[root@localhost home]# more /root/.vnc/localhost.localdomain:1.log
Xvnc TigerVNC 1.8.0 - built Nov 2 2018 19:05:14
Copyright (C) 1999-2017 TigerVNC Team and many others (see README.txt)
See http://www.tigervnc.org for information on TigerVNC.
Underlying X server release 12001000, The X.Org Foundation
Tue Jul 30 10:04:03 2019
vncext: VNC extension running!
vncext: Listening for VNC connections on all interface(s), port 5901
vncext: created VNC server for screen 0
The XKEYBOARD keymap compiler (xkbcomp) reports:
Internal error: Could not resolve keysym XF86WWAN Internal error: Could not resolve keysym XF86RFKill Errors from xkbcomp are not fatal to the X server Killing Xvnc process ID 11012
yum groupinstall "GNOME Desktop" "Graphical Administration Tools" -y
總計
1.6 MB/s | 2.4 MB 00:00:01
Running transaction check
Running transaction test
Transaction check error:
file /boot/efi/EFI/centos from install of fwupdate-efi-12-5.el7.centos.x86_64 conflicts with file from package grub2-common-1:2.02-0.64.el7.centos.noarch
錯誤概要：
該問題是由于fwupdate-efi 元件與grub2-common沖突導緻安裝出錯，這時可以通過更新grub2-common元件，來處理。
如下：
[root@localhost ~]# yum update grub2-common
已加載插件：fastestmirror, langpacks
Loading mirror speeds from cached hostfile
base: mirrors.aliyun.com
epel: mirrors.aliyun.com
extras: mirrors.aliyun.com
updates: mirrors.aliyun.com
正在解決依賴關系
--> 正在檢查事務
---> 軟體包 grub2-common.noarch.1.2.02-0.64.el7.centos 将被 更新
--> 正在處理依賴關系 grub2-common = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-tools-2.02-0.64.el7.centos.x86_64 需要
--> 正在處理依賴關系 grub2-common = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-tools-minimal-2.02-0.64.el7.centos.x86_64 需要
--> 正在處理依賴關系 grub2-common = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-pc-2.02-0.64.el7.centos.x86_64 需要
--> 正在處理依賴關系 grub2-common = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-pc-modules-2.02-0.64.el7.centos.noarch 需要
--> 正在處理依賴關系 grub2-common = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-tools-extra-2.02-0.64.el7.centos.x86_64 需要
---> 軟體包 grub2-common.noarch.1.2.02-0.76.el7.centos.1 将被 更新
---> 軟體包 grub2-pc.x86_64.1.2.02-0.64.el7.centos 将被 更新
--> 正在處理依賴關系 grub2-pc = 1:2.02-0.64.el7.centos，它被軟體包 1:grub2-2.02-0.64.el7.centos.x86_64 需要
---> 軟體包 grub2-pc.x86_64.1.2.02-0.76.el7.centos.1 将被 更新
---> 軟體包 grub2-pc-modules.noarch.1.2.02-0.64.el7.centos 将被 更新
---> 軟體包 grub2-pc-modules.noarch.1.2.02-0.76.el7.centos.1 将被 更新
---> 軟體包 grub2-tools.x86_64.1.2.02-0.64.el7.centos 将被 取代
---> 軟體包 grub2-tools.x86_64.1.2.02-0.64.el7.centos 将被 更新
---> 軟體包 grub2-tools.x86_64.1.2.02-0.76.el7.centos.1 将被 舍棄
---> 軟體包 grub2-tools-extra.x86_64.1.2.02-0.64.el7.centos 将被 更新
---> 軟體包 grub2-tools-extra.x86_64.1.2.02-0.76.el7.centos.1 将被 舍棄
---> 軟體包 grub2-tools-minimal.x86_64.1.2.02-0.64.el7.centos 将被 更新
---> 軟體包 grub2-tools-minimal.x86_64.1.2.02-0.76.el7.centos.1 将被 舍棄
---> 軟體包 grub2.x86_64.1.2.02-0.64.el7.centos 将被 更新
---> 軟體包 grub2.x86_64.1.2.02-0.64.el7.centos 将被 取代
---> 軟體包 grub2.x86_64.1.2.02-0.76.el7.centos.1 将被 舍棄
--> 解決依賴關系完成
依賴關系解決
========================================================================================================================
Package 架構 版本 源 大小
正在安裝:
grub2 x86_64 1:2.02-0.76.el7.centos.1 updates 31 k
替換 grub2.x86_64 1:2.02-0.64.el7.centos
grub2-tools x86_64 1:2.02-0.76.el7.centos.1 updates 1.8 M
替換 grub2-tools.x86_64 1:2.02-0.64.el7.centos
grub2-tools-extra x86_64 1:2.02-0.76.el7.centos.1 updates 995 k
grub2-tools-minimal x86_64 1:2.02-0.76.el7.centos.1 updates 172 k
正在更新:
grub2-common noarch 1:2.02-0.76.el7.centos.1 updates 728 k
為依賴而更新:
grub2-pc x86_64 1:2.02-0.76.el7.centos.1 updates 31 k
grub2-pc-modules noarch 1:2.02-0.76.el7.centos.1 updates 846 k
安裝 4 軟體包
更新 1 軟體包 (+2 依賴軟體包)
總計 4.5 MB/s | 4.5 MB 00:00:00
Transaction test succeeded
Running transaction
正在更新 : 1:grub2-common-2.02-0.76.el7.centos.1.noarch 1/14
正在安裝 : 1:grub2-tools-minimal-2.02-0.76.el7.centos.1.x86_64 2/14
正在安裝 : 1:grub2-tools-2.02-0.76.el7.centos.1.x86_64 3/14
正在安裝 : 1:grub2-tools-extra-2.02-0.76.el7.centos.1.x86_64 4/14
正在更新 : 1:grub2-pc-modules-2.02-0.76.el7.centos.1.noarch 5/14
正在更新 : 1:grub2-pc-2.02-0.76.el7.centos.1.x86_64 6/14
正在安裝 : 1:grub2-2.02-0.76.el7.centos.1.x86_64 7/14
清理 : 1:grub2-2.02-0.64.el7.centos.x86_64 8/14
清理 : 1:grub2-pc-2.02-0.64.el7.centos.x86_64 9/14
清理 : 1:grub2-tools-extra-2.02-0.64.el7.centos.x86_64 10/14
清理 : 1:grub2-pc-modules-2.02-0.64.el7.centos.noarch 11/14
清理 : 1:grub2-tools-minimal-2.02-0.64.el7.centos.x86_64 12/14
清理 : 1:grub2-tools-2.02-0.64.el7.centos.x86_64 13/14
清理 : 1:grub2-common-2.02-0.64.el7.centos.noarch 14/14
驗證中 : 1:grub2-pc-2.02-0.76.el7.centos.1.x86_64 1/14
驗證中 : 1:grub2-common-2.02-0.76.el7.centos.1.noarch 2/14
驗證中 : 1:grub2-tools-2.02-0.76.el7.centos.1.x86_64 3/14
驗證中 : 1:grub2-2.02-0.76.el7.centos.1.x86_64 4/14
驗證中 : 1:grub2-pc-modules-2.02-0.76.el7.centos.1.noarch 5/14
驗證中 : 1:grub2-tools-minimal-2.02-0.76.el7.centos.1.x86_64 6/14
驗證中 : 1:grub2-tools-extra-2.02-0.76.el7.centos.1.x86_64 7/14
驗證中 : 1:grub2-tools-minimal-2.02-0.64.el7.centos.x86_64 8/14
驗證中 : 1:grub2-tools-extra-2.02-0.64.el7.centos.x86_64 9/14
驗證中 : 1:grub2-pc-2.02-0.64.el7.centos.x86_64 10/14
驗證中 : 1:grub2-common-2.02-0.64.el7.centos.noarch 11/14
驗證中 : 1:grub2-tools-2.02-0.64.el7.centos.x86_64 12/14
驗證中 : 1:grub2-tools-2.02-0.64.el7.centos.x86_64 13/14
驗證中 : 1:grub2-2.02-0.64.el7.centos.x86_64 14/14
驗證中 : 1:grub2-2.02-0.64.el7.centos.x86_64 15/14
驗證中 : 1:grub2-pc-modules-2.02-0.64.el7.centos.noarch 16/14
已安裝:
grub2.x86_64 1:2.02-0.76.el7.centos.1 grub2-tools.x86_64 1:2.02-0.76.el7.centos.1
grub2-tools-extra.x86_64 1:2.02-0.76.el7.centos.1 grub2-tools-minimal.x86_64 1:2.02-0.76.el7.centos.1
更新完畢:
grub2-common.noarch 1:2.02-0.76.el7.centos.1
作為依賴被更新:
grub2-pc.x86_64 1:2.02-0.76.el7.centos.1 grub2-pc-modules.noarch 1:2.02-0.76.el7.centos.1
替代:
grub2.x86_64 1:2.02-0.64.el7.centos grub2-tools.x86_64 1:2.02-0.64.el7.centos
完畢！
[root@localhost ~]#
然後在重新安裝
[root@localhost ~]# systemctl status -l vncserver@:1.service
Active: active (running) since 二 2019-07-30 11:09:26 CST; 12s ago
Main PID: 45172 (Xvnc)
CGroup: /system.slice/system-vncserver.slice/vncserver@:1.service
? 45172 /usr/bin/Xvnc :1 -auth /root/.Xauthority -desktop localhost.localdomain:1 (root) -fp catalogue:/etc/X11/fontpath.d -geometry 1024x768 -pn -rfbauth /root/.vnc/passwd -rfbport 5901 -rfbwait 30000
7月 30 11:09:23 localhost.localdomain systemd[1]: Starting Remote desktop service (VNC)...
7月 30 11:09:26 localhost.localdomain systemd[1]: Started Remote desktop service (VNC).
這時在啟動vncser就可以。