VNC（Virtual Network Console）是在基于 UNIX 和 Linux 操作系统的免费的开源软件。
## 服务器端配置
查询vnc-sever
```
yum provides vnc-server
yum info tigervnc-server
```
安装vnc-sever
```
yum install tigervnc-server -y
```
创建用户
```
useradd user01
passwd user01
```
切换用户，启用vnc
```
su - user01
vncserver :1
You will require a password to access your desktops.
Password:
Verify:
Would you like to enter a view-only password (y/n)? n
A view-only password is not used
xauth: file /home/user01/.Xauthority does not exist
New 'centos701:1 (user01)' desktop is centos701:1
Creating default startup script /home/user01/.vnc/xstartup
Creating default config /home/user01/.vnc/config
Starting applications specified in /home/user01/.vnc/xstartup
Log file is /home/user01/.vnc/centos701:1.log
exit
```
查询socket statistics状态
```
ss -antp | grep 5901
```
设置防火墙例外（TCP 5901 - TCP 5910）
```
firewall-cmd --permanent --add-port=5901-5910/tcp
firewall-cmd --reload
firewall-cmd --list-ports
```
设置 / 重置vnc密码
```
su - user01
vncpasswd
```
查询vnc会话，结束vnc会话
```
su - user01
vncserver -list
vncserver -kill :1
```
开机自动启动服务
```
cp /lib/systemd/system/vncserver@.service /etc/systemd/system/vncserver@:1.service
vi /etc/systemd/system/vncserver@:1.service
# 替换<USER>为user01
systemctl daemon-reload
systemctl enable vncserver@:1.service
```
查询服务配置 /etc/systemd/system/vncserver@:1.service
```
cat /etc/systemd/system/vncserver@:1.service | grep -v "^#"
[Unit]
Description=Remote desktop service (VNC)
After=syslog.target network.target
[Service]
Type=forking
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/usr/sbin/runuser -l user01 -c "/usr/bin/vncserver %i"
PIDFile=/home/user01/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
[Install]
WantedBy=multi-user.target
```
报错1：Authentication is required to set the network proxy used for downloading packages
修改配置文件 vi /etc/xdg/autostart/gpk-update-icon.desktop，在底部添加
```
X-GNOME-Autostart-enabled=false
```
on Redhat 7
```
# redhat Authentication is required to set the network proxy used for downloading software
# To Disable the message in Red Hat Enterprise Linux 7
yum install gnome-software
sed -e '$aX-GNOME-Autostart-enabled=false' -e '/X-GNOME-Autostart-enabled/d' -i.bak /etc/xdg/autostart/gnome-software-service.desktop
```
报错2：Could not connect to session bus: Failed to connect to socket /tmp/dbus-JS7ByyeJhx: Connect refused
如果安装了conda，尝试卸载conda dbus
```
conda uninstall dbus
```
## 客户端配置
查询vncviewer
```
yum provides vncviewer
yum info tigervnc
```
安装vncviewer
```
yum install tigervnc -y
```
使用vncviewer
```
vncviewer
```
