Difference between revisions of "TigerVNC"

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* Or we can use the commands below to start/stop the vncservice, this will create the default xstartup file which can then be modified. The service has to be stopped to allow the modification to work when restarted.
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* Log back in as rootse the commands below to start/stop the vncservice, this will create the default xstartup file which can then be modified. The service has to be stopped to allow the modification to work when restarted.
  
 
  systemctl start vncserver@:1.service
 
  systemctl start vncserver@:1.service
 
  systemctl stop vncserver@:1.service
 
  systemctl stop vncserver@:1.service
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* Below are xstartup scripts for the various desktop environments, if the xstartup was made via your favourite editor then simply cut/paste the script required else if using the default xstartup remove its context and again cut/paste required script.
 
  
 
= TigerVNC Server Commands=
 
= TigerVNC Server Commands=

Revision as of 05:32, 29 December 2015

Warning.png WARNING
Amahi 7 for Fedora 19
Maintenance Support ONLY!


Amahi 8 (Fedora 21) Desktop Installation

For TigerVNC to work a Desktop Environment must be installed even if the HDA does not boot to the selected Desktop Environment.

This installation is based on a clean installation of Amahi 8, installing Fedora 21 using the Fedora Server DVD and following the installation instructions Fedora 21 Server Install .

The Cinnamon Desktop Environment was selected as it operates well on low spec computers.

NOTE: there is a one-click VNC App in BETA


Cinnamon Desktop Environment

  • As root, install Cinnamon Desktop Environment:
yum groupinstall "Cinnamon Desktop" --skip-broken

The reason for --skip-broken is that Fedora Workstation contains several variant packages that would otherwise conflict with the Server versions. By passing this argument, we’re letting yum know that it is okay to skip those packages that would have conflicts.

If you wish to boot Fedora into a graphical mode instead of console, as root use the following 

systemctl set-default graphical.target

TigerVNC Server Installation

  • It is recommended to only use TigerVNC on a secure network or via a VPN.
  • As root, install the server:
yum install tigervnc-server
  • Once install we need to create new configuration file, vncserver@.service is only a template file, from this we need t create a the following config file.
cp /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:1.service
  • Open the new configuration file
nano /lib/systemd/system/vncserver@:1.service
  • The configuration will look like this
# The vncserver service unit file
#
# Quick HowTo:
# 1. Copy this file to /etc/systemd/system/vncserver@:<display>.service
# 2. Edit <USER> and vncserver parameters appropriately
#   ("runuser -l <USER> -c /usr/bin/vncserver %i -arg1 -arg2")
# 3. Run `systemctl daemon-reload`
# 4. Run `systemctl enable vncserver@:<display>.service`
#
# DO NOT RUN THIS SERVICE if your local area network is
# untrusted!  For a secure way of using VNC, you should
# limit connections to the local host and then tunnel from
# the machine you want to view VNC on (host A) to the machine
# whose VNC output you want to view (host B)
#
# [user@hostA ~]$ ssh -v -C -L 590N:localhost:590M hostB
#
# this will open a connection on port 590N of your hostA to hostB's port 590M
# (in fact, it ssh-connects to hostB and then connects to localhost (on hostB).
# See the ssh man page for details on port forwarding)
#
# You can then point a VNC client on hostA at vncdisplay N of localhost and with
# the help of ssh, you end up seeing what hostB makes available on port 590M
#
# Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.
#
# Use "-localhost" to prevent remote VNC clients connecting except when
# doing so through a secure tunnel.  See the "-via" option in the
# `man vncviewer' manual page.
[Unit]
Description=Remote desktop service (VNC)
After=syslog.target network.target
[Service]
Type=forking
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/sbin/runuser -l <USER> -c "/usr/bin/vncserver %i"
PIDFile=/home/<USER>/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
[Install]
WantedBy=multi-user.target
  • Under [Service] replace with the <USER> with the user name setup in Amahi/Fedora. For this example we will use tom. The modified file will look like this.
[Service]
Type=forking
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/sbin/runuser -l tom -c "/usr/bin/vncserver %i"
PIDFile=/home/tom/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
  • Once the config file vncserver@:1.service has been modified we next run the command as root.
systemctl daemon-reload


  • We now have to modify the firewall and open port 5901 in the iptables, run the command as root.
iptables -A INPUT -p tcp -m state --state NEW -m tcp --dport 5901 -j ACCEPT

Password Setup

  • Set the VNC password for the user as defined in the vncserver@:1.service, this will create the .VNC folder for each user and place a file called passwd inside the folder.


  • From the example log into terminal as the user, in this example it will be tom and run the following command
vncpasswd
  • The following response will appear waiting for a password to be entered
Password:
  • The following response will appear waiting to verify the password entered.
Verify:

Setup Desktop Environment Access

  • Modification of the ~/.vnc/xstartup will be required to run the Cinnamon Desktop-Environment. At this point the xstartup file doesn't exist so we do the following.


For this example we need to login as the user.

  • Create the xstartup file using the command below then copy/paste the required xstartup for the chosen desktop enviroment.
nano ~/.vnc/xstartup

Modify the xstartup to the below. 

#!/bin/sh
#
exec /usr/bin/cinnamon-session


  • Log back in as rootse the commands below to start/stop the vncservice, this will create the default xstartup file which can then be modified. The service has to be stopped to allow the modification to work when restarted.
systemctl start vncserver@:1.service
systemctl stop vncserver@:1.service

TigerVNC Server Commands

  • The following commands will allow you to start on boot and start the vncserver service.
systemctl enable vncserver@:1.service
systemctl start vncserver@:1.service
  • The following commands will allow you to disable start on boot and stop the vncserver service.
systemctl disable vncserver@:1.service
systemctl stop vncserver@:1.service
  • The following command will restart the vncserver service.
systemctl restart vncserver@:1.service
  • The following command will display the status of the vncserver service.
systemctl status vncserver@:1.service
  • The following command will stop the vncserver.
pkill vnc


Multiple User Setup

  • It is possible to setup multiple user login's other than root. For this example with will create 2 other users, Tom & Dick.


  • First we need to create these user, either using the Amahi Dashboard under the USER setting or by the following commands under root control.
adduser <user name>
  • For the example the commands will be
adduser tom
adduser dick
  • Then create a password for that user using the following command
passwd <user name>
  • For this example the command will be
passwd tom
passwd dick
  • When requested enter a password and renter the password to verify it for each user created.
  • Once the user are created we will need to assign configuration files for each user. For this will assign the following config files as followed.
  • Tom will be assigned the following config file using the following.
cp /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:2.service
  • Dick will be assigned the following config file.
cp /lib/systemd/system/vncserver@.service /lib/systemd/system/vncserver@:3.service
  • Once the config files are created we will need to modify them for the correct user access. Accessing the files using your favourite editor the config files need to be modified under [Service] to reflect the assigned user. For this example the files should look like the following.


  • For Tom (under root control)
nano /lib/systemd/system/vncserver@:2.service
  • Then modify the [Service] as followed
[Service]
Type=forking
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/sbin/runuser -l tom -c "/usr/bin/vncserver %i"
PIDFile=/home/tom/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'


  • For Dick (under root control)
nano /lib/systemd/system/vncserver@:3.service
  • Then modify the [Service] as followed
[Service]
Type=forking
# Clean any existing files in /tmp/.X11-unix environment
ExecStartPre=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
ExecStart=/sbin/runuser -l dick -c "/usr/bin/vncserver %i"
PIDFile=/home/dick/.vnc/%H%i.pid
ExecStop=/bin/sh -c '/usr/bin/vncserver -kill %i > /dev/null 2>&1 || :'
  • Once all the vncserver@:#.service files have been created and modified we then run the following command (as root)
systemctl daemon-reload
  • We need to assign password to access vnc-server for each user, for this each user needs to login in via terminal and run the the command as below, this will be the same procedure as described under the password section
vncpasswd
  • Once each user has created a password, then each user needs to login in via terminal and modify the xstarup file to reflect the chosen desktop environment as listed above. As above the xstartup file doesn't exist yet so each user will need make a xstartup file.


  • As above we can create the file either by
nano ~/.vnc/xstartup
  • Or
systemctl start vncserver@:1.service
systemctl stop vncserver@:1.service


  • For this example we will use the MATE-Desktop Environment, each user will copy the following into their xstartup file.
#!/bin/sh
#
# Uncomment the following two lines for normal desktop:
# unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
# exec /etc/X11/xinit/xinitrc
#
[ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup
[ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources
xsetroot -solid grey
vncconfig -iconic &
x-terminal-emulator -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
mate-session &
  • Once each xstartup file is modified we need to start each service. Login as root and run the following commands.
systemctl enable vncserver@:2.service
systemctl enable vncserver@:3.service
systemctl start vncserver@:2.service
systemctl start vncserver@:3.service
  • Once the services are running then each user can access their remote desktop using a client software as listed below.


  • From the example tom's access ip address will be
192.168.1.10:2
  • For dick's the access ip address will be
192.168.1.10:3


Multiple User/Multiply Desktop-Environment Setup

  • It is possible to for each user to use the VNC under different desktop-environment. For this example Tom wants to use KDE whilst Dick wants to use Cinnamon.


As root

  • Install each required desktop-environment.
  • Stop Tom's and Dick's VCN services.
systemctl disable vncserver@:2.service
systemctl disable vncserver@:3.service
systemctl stop vncserver@:2.service
systemctl stop vncserver@:3.service
  • As Tom login and alter the xstartup file to reflect the desktop-environment required.
nano ~/.vnc/xstartup
  • As Dick login and alter the xstartup file to reflect the desktop-environment required.
nano ~/.vnc/xstartup
  • As root restart all the services
systemctl enable vncserver@:2.service
systemctl enable vncserver@:3.service
systemctl start vncserver@:2.service
systemctl start vncserver@:3.service
  • Each user will now be-able to use their desktop-environment of there choice.


Windows Client Software

Download the latest Windows Client Software


Using UltraVNC for this example enter in the VNC Server text Box your hda ip address location with :1 as per the example picture below

The :1 refers to the vncserver@:1.service file that was modified


UltraVNC Screen1.png

If connection is successful it will as for a password, which is the password entered from the setup above.

Screenshots

Screenshot from the examples above showing root, tom & dick's VNC connections under different desktop-environments.

Example desktop.png

Screenshot of KDE Remote Desktop


KDE Example.png



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