vt - log into another system over lan
/usr/bin/vt nodename [lan_device]
/usr/bin/vt -p [lan_device]
vt enables a user to log into another HP 9000 system (nodename) over
an HP local area network. The -p option causes vt to send a poll
request over the local area network to find out what systems currently
have vtdaemon running (see vtdaemon(1M)). An asterisk (*) following a
nodename in the response indicates that the system is a vt gateway.
Plus signs (+) following the nodename indicate how many vt gateways
must be traversed to reach that system.
The optional argument lan_device specifies a character special device
name to use instead of the default device name to send and receive
data to and from the local area network. The major number for this
device must correspond to a CIO IEEE 802.3 local area network device.
Once a connection has been established, vt enters input mode. In this
mode, text typed is sent to the remote host. To issue vt commands
when in input mode, precede them with the vt escape character (see
Commands below). When in command mode, normal terminal editing
conventions are available.
The connection should terminate automatically upon termination of the
login shell on the remote machine. If the connection is not
terminated upon exit, it is likely that the ptydaemon on the remote
system has either been terminated or restarted. To terminate a vt
connection, enter command mode and use the quit command to terminate
vt recognizes the following commands. Commands can be abbreviated by
typing enough of the command to uniquely identify it.
cd remote-directory Change the working directory on the
remote machine to remote-directory. This
command is applicable for file transfer
escape [escape-char] Set the vt escape character. If a
character is not specified vt prompts
for one. To print or display the
current vt escape character simply press
Return in response to this prompt.
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help or ? Print a vt command summary.
lcd [directory] Change the local working directory. If
no directory is specified, use the
user's home directory. This command is
applicable for file transfer and shell
get remote-file local-file
receive remote-file local-file
Copy remote-file to local machine and
store as local-file. vt prompts for the
file names if they are not specified.
The file transfer can be aborted by
typing the interrupt character or
pressing the break key.
put local-file remote-file
send local-file remote-file Copy local-file to the remote machine
and store as remote-file. vt prompts
for the file names if they are not
specified. The file transfer can be
aborted by typing the interrupt
character or pressing the break key.
quit Terminate the connection and exit vt.
useruser-name[:[password]] Identify yourself to the remote vt
server. vt prompts for a password
(after disabling local echo) if a colon
(:) is appended to user-name. This
command must be executed before any file
transfer command can be used.
! [shellcommand] Shell escape. The given command is
passed to a sub-shell for execution. If
no command is given, a shell is started
and connected to the user's terminal.
Access Control Lists (ACLs)
When sending or receiving files using vt, optional ACL entries are
removed. New files have a summary of the access modes (as returned in
st_mode by stat() of the file being transferred (see stat(2)).
The diagnostics produced by vt are intended to be self-explanatory.
vt uses the Hewlett-Packard LLA (Link Level Access) direct interface
to the HP network drivers. vt uses the multicast address
0x01AABBCCBBAA. It should not be used or deleted by other applications
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accessing the network. vt uses the following IEEE 802.3 sap (service
access point) values: 0x90, 0x94, 0x98, 0x9C, 0xA0, 0xA4, 0xA8, 0xAC,
0xB0, 0xB4, 0xB8, 0xBC, 0xC0, 0xC4, 0xC8, 0xCC, 0xD0, and 0xD4. They
should not be used by other applications accessing the network.
When using vt on a system with multiple LAN cards installed, the
optional command-line argument lan_device may be required if the
remote system is not accessible through the default LAN device. The
appropriate lan_device is the one connected (either directly or by way
of other gateways) to the remote system.
If your system has been installed with the Desktop HP-UX product,
neither ptydaemon nor vtdaemon will be started by default. To start
these daemons, change PTYDAEMON_START and VTDAEMON_START from a 0 to a
1 in the /etc/rc.config.d/ptydaemon and /etc/rc.config.d/vt files,
respectively. The system must be either rebooted for these changes to
take effect, or you can start both daemons manually by typing the
where /dev/lan0 is the character special device file corresponding to
the IEEE 802.3 local area network device.
/dev/lan0 Default lan device name.
vtdaemon(1M), stat(2), lan(7), acl(5).
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