remotely from a Mac
This tutorial assumes that you already have set up your Unix account to
Unix account to run vncserver.
1. Start a VNC session on the
remote Unix server
Click on Finder:
Find the Utitlities folder and
Find Terminal and double click
This will bring up a Terminal
In the terminal window, type the following:
-l userid ccu.umanitoba.ca
If this is the first time logging in, you will receive a message that
looks like the following:
Answer the message with "yes" (no quotes).
|The authenticity of host
'antares.cc.umanitoba.ca (184.108.40.206)' can't be established.
RSA key fingerprint is 79:f7:ca:14:31:43:1b:d6:3c:ca:77:5d:bc:07:e6:d4.
Are you sure you want to continue connecting (yes/no)?
The terminal will ask you for your
password, enter your password.
If you get a response from SSH that looks like:
type "xterm" and press the
You should now be logged in. If you are unsure for any reason,
you can always check by typing:
if this returns a blank line, you are not logged in, otherwise, you are
Now that you are logged in, type:
You should receive a response that looks like the following:
New 'merak:3 (alvare)' desktop is merak:3
Starting applications specified in /home/u9/alvare/.vnc/xstartup
Log file is /home/u9/alvare/.vnc/merak:3.log
NOTE: the "merak:3" will be different for your VNC session.
"merak" refers to the hostname, it is short for
"merak.cc.umanitoba.ca". "3" refers to your desktop number.
hostname and number can be different each time you run VNC! It is
very important to remember your hostname and number each time you use
2. Set up port forwarding for
a secure session
Go back to your terminal window, and type:
-L PORT:FULLHOST:PORT FULLHOST -l userid
In the above, replace PORT with 5900 + desktop
number (e.g. if your desktop
number was "3", as in the above example, your port is "5903"), and
replace FULLHOST with your full hostname
(e.g. if your hostname above was "merak", as in the above example, your
full hostname is "merak.cc.umanitoba.ca")
NOTE: The 5900
is always constant; however, the desktop number (in this case, 3) is randomly generated
and will change each time! The desktop number is obtained from
the end of step 1 (i.e. when you ran "vncserver"
3. Installing Chicken of the
If you already have installed Chicken
of the VNC, you may skip this step!
Open the Chicken of the VNC website: http://sourceforge.net/projects/cotvnc/
Click the download button in the picutre above
Save the file, then go to your downloads (or desktop if using OS X 10.4
or older) and find the file cotvnc-20b4.dmg
Double click this file to "mount" the disk image:
You should now see a window that looks like the following:
Copy or move "Chicken of the VNC" into your Applications folder:
4. Connect to your VNC
session using Chicken of the VNC
Find Chicken of the VNC in Applications and double click on it
If this is your first time, you may see a window similar to this window
Click the open button on this window.
Now you are in Chicken of the VNC, you should see a window that looks
like the following:
Click the "+" button in the lower left hand corner, this will create a
new server session entry:
Fill out the fields as such:
Where display number is the display number vncserver gave us before,
and vnc_password is our VNC server password. This is the password
you should have created the first time you ever ran "vncserver", and it asked you for a
password. If ever you forget your password, you can use vncpasswd to change your
password. If you want to run vncpasswd,
must run this on the remote host (via. Terminal SSH)
In our above
example, we would fill out the window to look like this:
and voila! You are now working on your CCU desktop remotely,
MISSING LAUNCH BAR?
if your screen looks like this:
just hold down the "Control",
"Alt", and "Command" keys, and press the "~" key
you should now see a message box that looks like the following
Click "Fullscreen", then hold down the Control, Alt, and Command keys, and press the "~" key again
if you have to use the "Control"-"Alt"-"Command"-"~" method, it may be a good
idea to write this down, or make a file on your UNIX desktop. The
reason being to avoid the risk of getting stuck in Fullscreen mode.
|You can log out and log back into your
VNC session as often as you wish.
If you kill your vncviewer or your Terminal SSH session, the vncserver
is still running on the server. For example, you could be in the
lab working on a file in a vnc session, and decide to go home. You can
kill your vncviewer in the lab, and when you get home, login to
the vncserver just as you did at the lab. The desktop in the vncviewer
window will be precisely as you left it, with all programs open where
they were, and the cursor in the same place as it was when you killed
The one thing to remember is to kill your vncserver session when you're
done with it. It's easy to forget that you already have a session
running, and start another session. Many programs, such as Firefox and
mail programs, can encounter problems if you have multiple instances of
those programs running simultaneously.
4a. Only, if you are unable
to connect using step 4
If for some reason you are unable
to connect, you may wish to try using your full remote hostname (e.g.
merak.cc.umanitoba.ca) instead of localhost
above; however, this is less
secure than using localhost.
5. Terminate your VNC session
is fairly secure, it's asking for trouble to be logged in, in any
fashion, when you're not doing anything. When you're done, kill
On BIRCH systems, you can also use the
Remember, if you launched vncserver on mira, you must log into
mira to kill the job. You can't kill it on merak, toliman, etc.
DO NOT LEAVE VNCSERVER RUNNING WHEN YOU AREN'T USING IT!
Aside from being a security hole, having numerous vncserver jobs
running can sometimes confuse desktop systems such as GNOME, and can
sometimes lead to corruption of configuration files.
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