R: [Netkit.users] connecting to uml hosts
rsebunya a dicts.mak.ac.ug
Gio 28 Ott 2004 15:33:09 CEST
Thanks , will try out your advice and let you know how it goes.
Massimo Rimondini writes:
> Dear Robert,
> sorry for answering you so late, but I have been somewhat busy during the
> past days, and I had to collect some information before being able to
> provide you with a meaningful reply.
> AFAIK, making a virtual machine use a terminal different from the standard
> xterm is not easy by using the standard vstart script. Therefore, I can
> suggest you some solutions which I derived from the User Mode Linux page
> - The first solution is to attach the virtual machine to the current Virtual
> Terminal (VT). In order to do this, type 'vstart <host_name> --new --print'.
> This command does not actually start a virtual machine: it just shows you
> the kernel command line that would be used to do this. Copy this line (just
> the line between "starting virtual machine..." and "nothing done.") and
> paste it on the shell prompt. Before pressing Enter, change the parameters
> 'con=' and 'con0=xterm' to the following values:
> con= con0=tty:`tty`
> The '`'s before and after 'tty' are used to avoid having to deal with device
> names. If you experience difficulties in using this procedure (e.g., you
> cannot type '`' before your keyboard does not support it or whatever else),
> you can separately type 'tty' at the shell prompt, copy the result (which
> looks like '/dev/ttyX', X being a number) and paste it after 'con0=tty:'.
> The outcome is exactly the same.
> Consider that, sometimes, this procedure can screw up your terminal after
> stopping the virtual machine. For example, the characters you type at the
> shell prompt may not be echoed any more. If this happens, you can play with
> 'stty' or similar commands in order to restore things (for example, typing
> 'stty echo' at the shell prompt, even if you do not see anything on screen
> while typing, should restore character echoing).
> - The above solution consistently limits the number of virtual machines you
> can start, because you usually have about 5 available virtual terminals.
> Another (nicer) chance is to associate a (telnet) port to each virtual
> machine, so that you can connect to the VM console and use it only when
> needed. In order to do this, you have to make the 'port-helper' command
> available in the path /usr/lib/uml. In order to do this, become superuser
> and create the directory /usr/lib/uml by typing 'mkdir /usr/lib/uml' (if it
> does not already exist). Then link the command port-helper by typing 'ln -s
> /absolute/path/to/netkit/bin/port-helper /usr/lib/uml'.
> You can now use telnet ports. In order to do this, prepare the kernel
> command line as shown above and change the parameters 'con=' and
> 'con0=xterm' to the following:
> con= con0=port:9000
> where 9000 can be any port number you like. You can then attach yourself to
> the VM terminal by using 'telnet localhost 9000'. I believe this is a
> solution that better fits your needs.
> - Another chance is to set up a tunnel so that the VM can communicate with
> the rest of the world: this allows you to telnet to a server inside the
> virtual machine itself. You can find more information about making virtual
> hosts connect to external networks at the page
> (http://user-mode-linux.sourceforge.net/networking.html); somewhat technical
> stuff, though...
> Hope this helps.
> Kind regards,
> Massimo Rimondini
> # -----Messaggio originale-----
> # Da: netkit.users-admin a dia.uniroma3.it
> # [mailto:netkit.users-admin a dia.uniroma3.it]Per conto di Robert Sebunnya
> # Inviato: domenica 17 ottobre 2004 12.48
> # A: netkit.users a dia.uniroma3.it
> # Oggetto: [Netkit.users] connecting to uml hosts
> # Hello, everyone.I am wondering whether it is possible to creates virtual
> # hosts while not using x -windows.How does one connect to such
> # created hosts?
> # Robert Sebunnya
> # Netwaork Operations
> # Directorate for ICT Supoort
> # Makerere University
> # Uganda, East Africa
> # _______________________________________________
> # Netkit.users mailing list
> # Netkit.users a pop.dia.uniroma3.it
> # http://pop.dia.uniroma3.it/mailman/listinfo/netkit.users
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