NAME

vt − log in on another system over lan

SYNOPSIS

vt nodename [lan_device]
vt −p [lan_device]

DESCRIPTION

vt enables a user to log in on 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 IEEE802.3 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.  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 the connection. 

Commands

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 only. 

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. 

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 escapes only. 

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)).

DIAGNOSTICS

The diagnostics produced by vt are intended to be self-explanatory. 

WARNINGS

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 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 that has 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. 

FILES

/dev/ieee Default lan device name. 

SEE ALSO

vtdaemon(1M), stat(2), lan(4), acl(5). 

vt tutorial in Remote Access Users Guide.

Hewlett-Packard Company  —  HP-UX Release 9.10: April 1995