VNC [1] (Virtual Network Console)是虚拟网络控制台的缩写。它 是一款优秀的远程控制工具软件，由著名的 AT&T 的欧洲研究实验室开发的。VNC 是在基于 UNIX 和 Linux 操作系统的免费的开源软件，远程控制能力强大，高效实用，其性能可以和 Windows 和 MAC 中的任何远程控制软件媲美。 在 Linux 中，VNC 包括以下四个命令：vncserver，vncviewer，vncpasswd，和 vncconnect。大多数情况下用户只需要其中的两个命令：vncserver 和 vncviewer。
VNC演示
//安装vnc
[root@localhost ~]# yum -y install tigervnc-server
[root@localhost ~]# rpm -ql tigervnc-server
/etc/sysconfig/vncservers
/usr/bin/vncserver
/usr/bin/x0vncserver
/usr/lib/.build-id
/usr/lib/.build-id/8c
/usr/lib/.build-id/8c/a894f418058be79814cff89f87dad1bab7387a
/usr/lib/systemd/system/xvnc.socket
/usr/lib/systemd/system/xvnc@.service
/usr/lib/systemd/user/vncserver@.service
/usr/share/man/man1/vncserver.1.gz
/usr/share/man/man1/x0vncserver.1.gz//查看配置文件
[root@localhost ~]# cat /usr/lib/systemd/system/xvnc@.service
# The vncserver service unit file
#
# Quick HowTo:
# 1. Copy this file to /etc/systemd/system/xvnc@.service
# 2. Copy xvnc.socket to /etc/systemd/system/xvnc.socket
# 3. Run `systemctl daemon-reload`
# 4. Run `systemctl enable xvnc.socket`
#
# DO NOT RUN THIS SERVICE if your local area network is
# untrusted! For a secure way of using VNC, you should
# limit connections to the local host and then tunnel from
# the machine you want to view VNC on (host A) to the machine
# whose VNC output you want to view (host B)
#
# [user@hostA ~]$ ssh -v -C -L 590N:localhost:590M hostB
#
# this will open a connection on port 590N of your hostA to hostB's port 590M
# (in fact, it ssh-connects to hostB and then connects to localhost (on hostB).
# See the ssh man page for details on port forwarding)
#
# You can then point a VNC client on hostA at vncdisplay N of localhost and with
# the help of ssh, you end up seeing what hostB makes available on port 590M
#
# Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.
#
# Use "-localhost" to prevent remote VNC clients connecting except when
# doing so through a secure tunnel. See the "-via" option in the
# `man vncviewer' manual page.[Unit]
Description=XVNC Per-Connection Daemon[Service]
ExecStart=-/usr/bin/Xvnc -inetd -query localhost -geometry 1024x768 -depth 24 -once -SecurityTypes=None
User=nobody
StandardInput=socket
StandardError=syslog//按照配置文件执行即可
