Cài đặt VNC server trên Ubuntu 14.04

VNC server is used to share graphical desktop which can be controlled from other computers . This guide is helpful to install VNC server on Ubuntu Desktop 14.04, Ubuntu server 14.04 and Ubuntu cloud 14.04 .
Basically ubuntu server and ubuntu cloud editions does not contains GUI, which needs to be installed before installing VNC server. Please note that server and cloud editions are carefully designed to utilize less hardware resources ( minimal environment ), installing GUI might leads to high hardware utilization.

Install VNC server on ubuntu 14.04

Step 1 » Start installing below gnome packages which helps VNC to load properly . These packages are required for all editions including ubuntu desktop .

sudo apt-get install gnome-panel gnome-settings-daemon metacity nautilus gnome-terminal

Step 2 » Now install vnc4server package.

sudo apt-get install vnc4server

Step 3 » Open /usr/bin/vncserver file and edit as follows . Before editing, make a backup copy.

sudo cp /usr/bin/vncserver /usr/bin/vncserver.bkp

sudo nano /usr/bin/vncserver

Find this line ( Line no:57 )
"# exec /etc/X11/xinit/xinitrc\n\n".

and add these lines like below

  “# exec /etc/X11/xinit/xinitrc\n\n”.
       “gnome-panel &\n”.
       “gnome-settings-daemon &\n”.
       “metacity &\n”.
       “nautilus &\n”.
       “gnome-terminal &\n”.
Step 4 » Now type the command vncserver to start VNC session. you will be prompted for creating new vnc password.
vncserver
You will require a password to access your desktops.
Password:******
Verify:******
xauth: file /home/boby/.Xauthority does not exist
New 'leela:1 (krizna)' desktop is leela:1
Creating default startup script /home/krizna/.vnc/xstartup
Starting applications specified in /home/krizna/.vnc/xstartup
Log file is /home/krizna/.vnc/leela:1.log

Step 5 » Now you can view your remote desktop using IP address and port ( Eg : 192.168.1.10:1 ).
install vnc server on ubuntu 14.04
install gui on ubuntu server
That’s it, your VNC server is working.

VNC server as service

Just like centos and other flavours , you can run VNC server as service in ubuntu.
This is very helpful, as it automatically starts vnc sessions when restarting the server.
Step 6 » Create a file vncserver in /etc/init.d/ directory

and add the below code .

#!/bin/bash
### BEGIN INIT INFO
# Provides:          VNCSERVER
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start daemon at boot time
# Description:       Enable service provided by daemon.
### END INIT INFO
unset VNCSERVERARGS
VNCSERVERS=“”
[ f /etc/vncservers.conf ] && . /etc/vncservers.conf
prog=$“VNC server”
start() {
. /lib/lsb/initfunctions
REQ_USER=$2
echo n $“Starting $prog: “
ulimit S c 0 >/dev/null 2>&1
RETVAL=0
for display in ${VNCSERVERS}
do
export USER=“${display##*:}”
if test z “${REQ_USER}” o “${REQ_USER}” == ${USER} ; then
echo n “${display} “
unset BASH_ENV ENV
DISP=“${display%%:*}”
export VNCUSERARGS=“${VNCSERVERARGS[${DISP}]}”
su ${USER} c “cd ~${USER} && [ -f .vnc/passwd ] && vncserver :${DISP} ${VNCUSERARGS}”
fi
done
}
stop() {
. /lib/lsb/initfunctions
REQ_USER=$2
echo n $“Shutting down VNCServer: “
for display in ${VNCSERVERS}
do
export USER=“${display##*:}”
if test z “${REQ_USER}” o “${REQ_USER}” == ${USER} ; then
echo n “${display} “
unset BASH_ENV ENV
export USER=“${display##*:}”
su ${USER} c “vncserver -kill :${display%%:*}” >/dev/null 2>&1
fi
done
echo e “\n”
echo “VNCServer Stopped”
}
case “$1” in
start)
start $@
;;
stop)
stop $@
;;
restart|reload)
stop $@
sleep 3
start $@
;;
condrestart)
if [ f /var/lock/subsys/vncserver ]; then
stop $@
sleep 3
start $@
fi
;;
status)
status Xvnc
;;
*)
echo $“Usage: $0 {start|stop|restart|condrestart|status}”
exit 1
esac
Step 7 » Modify execute permission for the file.
sudo chmod +x /etc/init.d/vncserver
Step 8 » Create vncservers.conf file in /etc/ directory as stated in service code.
sudo nano /etc/vncservers.conf
and add the below lines for starting vnc session for the user krizna.
VNCSERVERS=“1:krizna”
VNCSERVERARGS[1]=“-geometry 1024×768”
For additional vnc users.
Login into the user
su - bobby
Create VNC password by the below command . vncserver command ( step 4) is not required when starting as service .
vncpasswd
Password:
Verify:
Add user to the file.
VNCSERVERS=“1:krizna 2:bobby”
VNCSERVERARGS[1]=“-geometry 1024×768”
VNCSERVERARGS[2]=“-geometry 1024×768”
Now user krizna can be accessed using serverip:1 ( 192.168.1.10:1 )and bobby using serverip:2 ( 192.168.1.10:2 ).
Step 9 » Issue the below command to add vncserver service to default runlevels.
sudo update-rc.d vncserver defaults
Step 10 » Now start/restart the service.
sudo /etc/init.d/vncserver start
install gui on ubuntu cloud