Configure TigerVNC server In Fedora

Install VNC server on the remote system to which we want to log in on via remote desktop

yum -y install tigervnc-server

As soon as the installation is finished, make a backup of the VNC server configuration file located in /etc/sysconfig/vncservers.

cp /etc/sysconfig/vncservers /etc/sysconfig/vncservers.backup

Open VNC server configuration file located with your desired editor.

vi /etc/sysconfig/vncservers

Read the instructions in this file. Have a look at the commented example at the end of the configuration file.

# VNCSERVERS="2:myusername"
# VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -localhost"

VNCSERVERS="1:root"
VNCSERVERARGS[1]="-geometry 1440x900 -nolisten tcp -localhost"

Create VNC passwords for your user. Log in as the user (zdenek in my example) and type command

vncpasswd

Go to user's .vnc directory on VNC server

cd ~/.vnc

- Edit configuration xstartup file

vi xstartup

- Comment "vncconfig -iconic &" line with "#" symbol, so the result will looks like this

#vncconfig -iconic &

Go to the end of the file, comment line with "twm &" and add "startx &" to initiate Gnome or "startkde &" for KDE environment initialization. The final result fill be following:
for Gnome

#twm &
startx &

Start VNC server

service vncserver restart

You should see following output

[root@NaN NaN]# service vncserver start
Starting VNC server: 1:root                                [  OK  ]

Add the VNC  tcp,udp port Number in firewall

Finally The VNC tcp,udp port number will add in others port number in firewall

Open vnc viewer on your client - execute command

vncviewer

Or start the application from menu "Applications" > "Internet" > "TigerVNC Viewer". Following window will pop up

Type there the IP address of the localhost (127.0.0.1) and port number of your desktop behind the colon (Do not use the public / private IP address of your VNC server because it will not work; use only localhost). In general, use 127.0.0.1:N, where N is number of the assigned desktop. In my case it is the desktop number 1. Click OK button. You will be asked for password. Type the one you have set up in the step 6 above and enter the return key.

A window with remote desktop will appear.