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: http://www.stsci.edu/ftp/documents/system-docs/vms-guide/html/VUG_9.html
Дата изменения: Wed Nov 1 17:38:30 1995 Дата индексирования: Sun Dec 23 18:22:22 2007 Кодировка: Поисковые слова: вторая космическая скорость |
Terminals are connected to the Xyplex. When you turn on the terminal, you will typically get the Xyplex prompt. There are three possible prompts that can initially appear: The standard
Table 1.1 lists some of the commands available for working with multiple sessions on the Xyplex. Note that there are two columns with slightly different commands and syntax. The new Xyplex commands are likely to be used by most users, including those coming in over the higher speed modems. Old Xyplex commands will affect some users, including those using the 2400 baud or slower modems.
The first time you use Terminal to access the Institute's systems, you will need to define the communications parameters, such as phone number, line speed, etc. These are set using options under the Settings menu. Modem phone numbers are provided by the system managers. Modem speeds up to 9600 bps are supported. The communications parameters should be set to no parity, 8 data bits, and 1 stop bit.
After you set the communications parameters, save them for future use by using the "Save" command from the File menu.
If you have previously set up a terminal session and saved the parameters in a file, choose "Open" from the File menu and select the parameter file. Then choose "Dial" from the Phone menu to connect to the Xyplex. When the
When you are done using the VMS system, type
On your PC, go to the directory where your Kermit software is installed. Start the program by typing
When the connection is established, you will see the word
When you are ready to log out, you will need to type
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Xyplex
Most users connect to the Institute's VMS hosts through the Xyplex terminal server. Incoming modems use the Xyplex as well, so if you're working from a PC at home, this section will apply to you.Xyplex> or Xt_command: prompt, or the Enter username> prompt. There are currently two different Xyplex servers at the Institute; the new one asks for a Xyplex user name, and uses the Xyplex> prompt, the old one uses the Xt_command: prompt and does not ask for a user name. Enter username>
If you have the Xyplex Enter username> prompt, please type your username to help in troubleshooting Xyplex problems. Then press 
. This will give you the standard Xyplex> prompt. Xyplex> or Xt_Command:
Connect to a VMS system by typing C followed by the name of the system you want to use. Then press 
. For example, to start a session on the VMS host KEPLER, you would type:
Xyplex> c kepler
The system will respond with the VMS login prompt. Type your assigned username and password when prompted. Figure 1.1 shows a sample Xyplex login to KEPLER.
Figure 1.1: Logging in Through the Xyplex
After typing your VMS username and password, you should get the VMS system prompt, which is a dollar sign ($). If you are unable to get a system prompt, see "Troubleshooting" on page 12, or contact the system managers for help. Multiple Sessions on the Xyplex
The Xyplex server allows you to have up to four simultaneous sessions. This may be useful, for example, when you want to work on two or more host systems. When you are logged in to a system through the Xyplex, you can return to the Xyplex> (or Xt_command:) prompt by pressing 
. Use the select command followed by a session number to choose another session. For example, select 2. You can then log in to another machine using the C command, as described above.
Table 1.1: Xyplex Commands
Type logout at the Xyplex prompt when you are done.
Workstations
Most workstations are connected to one of the VMS clusters. You will see the initial login screen. Figure 1.2 shows the initial login screen of a DEC system. To login, enter your username and password for the cluster to which your workstation is connected and then press the 
key (or use the mouse to point at the [OK] button and then press the left mouse button). 
Figure 1.2: Initial Login Screen
Your working environment will be a graphical interface known as Motif. This is described in Chapter 6 on page 103. PCs
Personal computer (PC) users usually access the VMS systems using a modem, however, you can also log in or copy files using a PC connected via Pathworks or another software package. In this section we will first describe two methods for using a modem: one using the Terminal program that comes with Microsoft Windows, the other using Kermit. Many other communications packages are available--many that are far more powerful and full-featured than Terminal or Kermit--but the basic process of connecting is similar, so you should be able to easily extend the discussion of these packages to equivalent commands in whatever communications package you choose. Modem Using Microsoft Windows Terminal Accessory
If you are running Microsoft Windows on your PC, and have a modem, you can use the Windows Terminal program to access the VMS systems. Start the Terminal program (this is usually in your Accessories group).CONNECT message is displayed, press 
a couple times. Follow the login instructions described in "Xyplex" on page 1.LOGOUT. This will return you to the Xyplex. Type LOGOUT again. This breaks your connection. Choose "Hangup" from the Phone menu. Modem with Kermit
If you have Kermit installed on your PC, you can use it to connect to the Institute's computers. Make sure your communications parameters are properly configured for the COM port that the modem will use, and the correct modem speed. KERMIT. For example:
C:\> CD KERMIT
C:\KERMIT\> KERMIT
MS-Kermit>
To connect to a remote host, press 
and then press 
. A blank screen will appear. Dial the modem using standard Hayes AT commands. For example:
ATDT14105551212
The ATDT command, followed by the phone number of the remote modem, is the command to dial with touch-tone dialing. After typing the command, you will hear the modem dialing and then connecting.CONNECT on the screen. Press 
a few times to get the Xyplex username prompt. At this prompt, type your username. For example:
Welcome to the Xyplex Terminal Server.
Enter username> B. Johnson
After you type your username, you will get the usual Xyplex> prompt. Continue logging in as described in "Xyplex" on page 1.LOGOUT twice. Once at the VMS system prompt and once at the Xyplex> prompt. When Kermit displays the DISCONNECT message on your screen, press 
-
to get back to the MS-Kermit> prompt. Press 
to quit, and 
to confirm that you want to quit.