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how to use: vncserver and vncviewer

Hi all,

Installed vncserver rpm on RHEL5 and trying to start vncviewer (installed realvnc on windows box) for a user and getting this error:

Code:

unable to connect to host: Connection refused (10061)

I stopped the firewall

Code:

]# service iptables status

Firewall is stopped.

MORE info:

Code:

]# rpm -qa |grep vnc

vnc-server-4.1.2-14.el5_5.4

vnc-4.1.2-14.el5_5.4



entry in /etc/sysconfig/vncservers



 VNCSERVERS="1:admin"

 VNCSERVERARGS[1]="-geometry 800x600 -depth 16"



and



]# more /root/.vnc/xstartup

#!/bin/sh



# Uncomment the following two lines for normal desktop:

 unset SESSION_MANAGER

 exec /etc/X11/xinit/xinitrc



[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup

[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources

xsetroot -solid grey

vncconfig -iconic &

xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &

twm &

Then as "admin" user

Code:

$ vncpasswd

Password:

Verify:



Then started vncserver as admin user



$ vncserver :1



New 'hostname:1 (admin)' desktop is hostname:1



Starting applications specified in /home/admin/.vnc/xstartup

Log file is /home/admin/.vnc/hostname:1.log



and 



$ more /home/admin/.vnc/xstartup

#!/bin/sh



[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources

xsetroot -solid grey

vncconfig -iconic &

xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &

twm &

I am confused how to use this VNC ?

Does the RHEL server should be running at runlevel 5 to use VNC ?
it is currently at runlevel 3.

Thanks in advance!

Show log /home/admin/.vnc/hostname:1.log You can also check if vncviewer works on localhost. And you did not mentioned: are you trying to connect to port 5901? Like that:

Code:

vncviewer SERVER_IP:1

You have started vncserver on the desktop 1 so the port will be default+1.
You can see wich one is by using:

Code:

netstat -nalpt | grep vncser

Then put in address on vncviewer ip:port

Hi eSelix,

Code:

more /home/admin/.vnc/hostname:1.log

Couldn't open RGB_DB '/usr/X11R6/lib/X11/rgb'

_XSERVTransmkdir: Owner of /tmp/.X11-unix should be set to root



Xvnc Free Edition 4.1.3 - built Oct 15 2008 12:55:42

Copyright (C) 2002-2008 RealVNC Ltd.

See http://www.realvnc.com for information on VNC.

Underlying X server release 40201000, The XFree86 Project, Inc





Fri Mar 16 14:55:05 2012

 vncext:      VNC extension running!

 vncext:      Listening for VNC connections on port 5901

 vncext:      Listening for HTTP connections on port 5801

 vncext:      created VNC server for screen 0

error opening security policy file /usr/X11R6/lib/X11/xserver/SecurityPolicy

Could not init font path element /usr/X11R6/lib/X11/fonts/misc/, removing from list!

Could not init font path element /usr/X11R6/lib/X11/fonts/Speedo/, removing from list!

Could not init font path element /usr/X11R6/lib/X11/fonts/Type1/, removing from list!

Could not init font path element /usr/X11R6/lib/X11/fonts/CID/, removing from list!

Could not init font path element /usr/X11R6/lib/X11/fonts/75dpi/, removing from list!

Could not init font path element /usr/X11R6/lib/X11/fonts/100dpi/, removing from list!



Fatal server error:

could not open default font 'fixed'

XIO:  fatal IO error 104 (Connection reset by peer) on X server "hostname:1.0"

      after 0 requests (0 known processed) with 0 events remaining.

vncconfig: unable to open display "hostname:1"

xterm Xt error: Can't open display: hostname:1

twm:  unable to open display "hostname:1"

I noticed that immediately after starting the vncserver, it is getting stopped.

Code:

# service vncserver status

Xvnc is stopped

[root@hostname ~]# service vncserver start

Starting VNC server: 1:admin

New 'hostname:1 (admin)' desktop is hostname:1



Starting applications specified in /home/admin/.vnc/xstartup

Log file is /home/admin/.vnc/hostname:1.log



                                                          [  OK  ]

# service vncserver status

Xvnc is stopped





I tried 



$ vncviewer IP:1



VNC Viewer Free Edition 4.1.3 for X - built Oct 15 2008 12:49:56

Copyright (C) 2002-2008 RealVNC Ltd.

See http://www.realvnc.com for information on VNC.

vncviewer: unable to open display ""

I am using vncviewer with hostname:1

Hi Celyr

Code:

# netstat -nalpt |grep vnc

# echo $?

1

and also DOES THE SERVER WHERE VNCSERVER INSTALLED NEED TO BE AT RUN_LEVEL ?

No, you can run it at run level 3 with no problem at all.
It seems that the vncserver doesn't start because of the missing font, tomorrow I'll look for it :)

Check 3rd question on vncserver FAQ They say that on Red Hat you probably need to install 100dpi fonts or use "-dpi 75" option.

Ok, now i am able to see the desktop but it is all grey desktop but not real GUI one.

How to make it real GUI desktop ?

Below are few files

Code:

# more .vnc/xstartup

#!/bin/sh



# Uncomment the following two lines for normal desktop:

 unset SESSION_MANAGER

 exec /etc/X11/xinit/xinitrc



[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup

[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources

xsetroot -solid grey

vncconfig -iconic &

xterm -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &

twm &

The log file is

Code:

# more /root/.vnc/hostname:1.log

_XSERVTransSocketOpenCOTSServer: Unable to open socket for inet6

_XSERVTransOpen: transport open failed for inet6/hostname:1

_XSERVTransMakeAllCOTSServerListeners: failed to open listener for inet6



Xvnc Free Edition 4.1.2

Copyright (C) 2002-2005 RealVNC Ltd.

See http://www.realvnc.com for information on VNC.

Underlying X server release 70101000, The X.Org Foundation





Mon Mar 19 11:00:47 2012

 vncext:      VNC extension running!

 vncext:      Listening for VNC connections on port 5901

 vncext:      Listening for HTTP connections on port 5801

 vncext:      created VNC server for screen 0

localuser:root being added to access control list

No profile for user 'root' found



Mon Mar 19 11:02:02 2012

 Connections: accepted: 54.29.51.35::2993

 SConnection: Client needs protocol version 3.8

 SConnection: Client requests security type VncAuth(2)



Mon Mar 19 11:02:06 2012

 VNCSConnST:  Server default pixel format depth 16 (16bpp) little-endian rgb565

 VNCSConnST:  Client pixel format depth 8 (8bpp) rgb max 3,3,3 shift 4,2,0

 VNCSConnST:  Client pixel format depth 16 (16bpp) little-endian rgb565

Thanks in advance!

I think there is a GUI for modern distros. All I did was click some stuff in settings and allowed vnc users with a special password.

checkout this link: http://www.walkernews.net/2007/07/05...ux-vnc-server/, very helpful..

Hi Satyaveer Arya,

Thank you for the link.
I did similar setup/config but not getting desktop manager to work.
Only having text based console only.

But do you have twm installed? If not, install it or run another window manager that you have, in your xstartup file. Show also your /etc/X11/xinit/xinitrc.

Hi eSelix,

I think twm is installed

Code:

]# rpm -qa |grep -i twm

xorg-x11-twm-1.0.1-3.1

and below is the /etc/X11/xinit/xinitrc file

Code:

# Mandatorily source xinitrc-common, which is common code shared between the

# Xsession and xinitrc scripts which has been factored out to avoid duplication

. /etc/X11/xinit/xinitrc-common



# The user may have their own clients they want to run.  If they don't,

# fall back to system defaults.

if [ -f $HOME/.Xclients ]; then

    exec $SSH_AGENT $DBUS_LAUNCH $HOME/.Xclients || \

    exec $SSH_AGENT $HOME/.Xclients

elif [ -f /etc/X11/xinit/Xclients ]; then

    exec $SSH_AGENT $DBUS_LAUNCH /etc/X11/xinit/Xclients || \

    exec $SSH_AGENT /etc/X11/xinit/Xclients

else

    # Failsafe settings.  Although we should never get here

    # (we provide fallbacks in Xclients as well) it can't hurt.

    [ -x /usr/bin/xsetroot ] && /usr/bin/xsetroot -solid '#222E45'

    [ -x /usr/bin/xclock ] && /usr/bin/xclock -geometry 100x100-5+5 &

    [ -x /usr/bin/xterm ] && xterm -geometry 80x50-50+150 &

    [ -x /usr/bin/twm ] && /usr/bin/twm

fi

and how to know what is the default window manager and how to change them ?

are you able to use vncserver as root?

just give a cross check

instead of admin use root and assign a vncpasswd for root

Code:

#vncpasswd



#service vncserver restart

and check the status of service

and post the output of

Code:

#rpm -qa | grep vnc

Hi deep27ak,

Yes i am running vnc as root. I assigned a passwd and started the vncserver.

Code:

# service vncserver status

Xvnc (pid 2464) is running...

below is rpm output

Code:

# rpm -qa |grep vnc

vnc-4.1.2-14.el5_5.4

vnc-server-4.1.2-14.el5_5.4

If you get "text based console only" then it means that your Xvnc is working, but only window manager not started. Default in my system (Ubuntu) is stored in "/etc/X11/default-display-manager". You can change it in "~/.vnc/xstartup" file in place of line "/usr/bin/twm &".