Configuring VNC Server on Linux

linux安装oracle时，需用图形化界面安装。所以可采取下列的工具辅助安装

• sysvinit (Original Method)
• systemd (New Method)
• VNC Clients

sysvint (Original Method)

The sysvinit method works for RHEL and it's clones (Oracle Linux and CentOS) up to and including RHEL6. It also works for Fedora up to and including Fedora 15. Although Fedora 15 includes systemd, the VNC server configuration is unchanged, so you should still use this method.

Install the VNC Server.

# yum install tigervnc-server

Edit the "/etc/sysconfig/vncservers" file to configure the required displays. The following entries enable VNC for display numbers ":2" and ":3". Notice multiple "display:user" pairs are defined on a single line, but the arguments for each display are defined separately.

VNCSERVERS="1:root"

VNCSERVERARGS[2]="-geometry 1280x1024 -nolisten tcp -localhost"
此处以上方为例

#VNCSERVERS="2:root 3:oracle"
#VNCSERVERARGS[2]="-geometry 1280x1024 -nolisten tcp -localhost"
#VNCSERVERARGS[3]="-geometry 1280x1024"

Set the VNC password for any users defined in the "/etc/sysconfig/vncservers" file.

　密码必须设置**

# vncpasswd
Password:
Verify:
#

#################
# su - oracle
$ vncpasswd
Password:
Verify:
$ exit
logout
# 

Enable the "vncserver" service for autostart and start the service.

# chkconfig vncserver on
# service vncserver start

You should now be able to use a VNC viewer to connect to system using the display numbers and passwords defined.

Use the following commands to stop the service and disable autostart.

# service vncserver stop
# chkconfig vncserver off
使用VNC viewer就可以远程连接服务器，输入IP:1。

systemd (New Method)

The systemd method works for Fedora 16 and above. Although Fedora 15 uses systemd, the VNC server configuration is unchanged so you still use the previous configuration method. This method also works for RHEL7/OL6/CentOS7.

Install the VNC Server.

# yum install tigervnc-server

Create a new configuration file for each of the display numbers you want to enable. In the following case, I am setting up the display number ":3". Notice how the display number is included in the configuration file name. In some Fedora releases they suggest not including the display number, as systemd will spawn correct config in memory on first request.

# cp /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:3.service

Edit the new configuration file, amending the user and startup arguments as necessary. An example of the changed lines is shown below. All other lines should be unmodified. The geometry is set below, but this line doesn't have to be modified if the default geometry of "1280x1024" is acceptable.

User=oracle
ExecStart=/usr/bin/vncserver %i -geometry 1440x1080
PIDFile=/home/oracle/.vnc/%H%i.pid

Run the following command.

# systemctl daemon-reload

Set the VNC password for the user defined in the new configuration file.

# su - oracle
$ vncpasswd
Password:
Verify:
Would you like to enter a view-only password (y/n)? n
$ exit
logout
# 

Enable the service for autostart and start the service.

# systemctl enable vncserver@:3.service
# systemctl start vncserver@:3.service

You should now be able to use a VNC viewer to connect to system using the display number and password defined.

Use the following commands to stop the service and disable autostart.

# systemctl stop vncserver@:3.service
# systemctl disable vncserver@:3.service

VNC Clients

Once your VNC server is configured, you can connect to it from any VNC server. On Linux this will often be TigerVNC, installed using the following command.

# yum install tigervnc

Connect to a VNC server using the following command.

# vncviewer machine-name:port

# vncviewer maggie.localdomain:3
# vncviewer 192.168.0.4:3