HP 3000 Manuals HP 3000 Manuals
Lesson 3 Entering Commands
Lesson 3 presents entering commands and getting information from the
computer.
* how to execute commands
* commands to get information:
* get the current time and date: SHOWTIME
* get information about your session: SHOWME
* get information about sessions and jobs: SHOWJOB
Understanding commands
Commands are the instructions that you give the computer. They may be
simple and consist of a single word (SHOWME), or they may be complicated
and require that you enter many words or numbers.
Executing a command
Executing a simple command takes only two steps:
1. Type the name of the command at the system prompt.
2. Press the Return key.
With a few exceptions, commands either execute successfully or give you a
warning or an error message. In either case, the prompt returns, and the
computer waits for your next instruction.
The SHOWTIME command
Start a session with your MPE/iX system by logging on now.
HELLO your logon identityReturn
Type SHOWTIME at the prompt, and press Return.
SHOWTIMEReturn
On the screen, you should see something like this:
________________________________________________________________________
| |
| |
| :SHOWTIME |
| |
| |
| FRI, JUN 30, 1989, 3:58 PM |
| :_ |
| |
________________________________________________________________________
You may find this online:clock clock and calendar very useful.
The SHOWME command
The SHOWME command displays information about your session and any
special logon message from your system operator or system manager.
Enter:
SHOWMEReturn
On the screen you should see something like this:
________________________________________________________________________
| |
| |
| :SHOWME |
| USER: #S118,JOHN.SMITHERS,MYGROUP (NOT IN BREAK) |
| RELEASE: A.21.13 MPE/iX HP31900 A.43.11 USER VERSION A.21.31 |
| CURRENT : FRI, JUN 29, 1990, 3:58 PM |
| LOGON : FRI, JUN 29, 1990, 3:57 PM |
| CPU SECONDS: 0 CONNECT MINUTES: 1 |
| $STDIN LDEV: 107 $STDLIST LDEV: 107 |
| |
| **************************************************************** |
| ** WELCOME TO SYSONE ** |
| **************************************************************** |
| ** LOG OFF BY 7 PM TONIGHT, PLEASE ** |
| ** ** |
| ** NIGHT SHIFT OPERATOR WILL TAKE SYSONE OFFLINE TONIGHT TO |
| ** |
| ** STORE ALL FILES ON THE SYSTEM TO A BACKUP TAPE. ** |
| ** ** |
| ** ALL SESSIONS AND JOBS WILL BE ABORTED AT 7:01 PM -- NO |
| ** |
| ** EXCEPTIONS. ** |
| **************************************************************** |
| ** Call ext. 5555 if you have any problems or questions!! |
| ** |
| **************************************************************** |
| :_ |
| |
________________________________________________________________________
Did the display scroll by too quickly to see? If it did, press the Prev
key once or twice to go "backward." Press the Next key the same number of
times to return to where you started. The terminal has some memory of
its own, and you can use these two keys to review whatever the screen
"remembers."
The SHOWME display provides valuable information. Locate each of the
following:
USER This identifies you on the computer in two ways:
* By session number: in this example, #S118
(session number 118). This number is
assigned to you by the system when you log
on.
* By logon identity: in this example,
JOHN.SMITHERS,MYGROUP (on the screen it
would show the way you logged on).
RELEASE Tells which version of your MPE/iX operating system
you that are using.
USER VERSION Allows for the identification of any software
customization done for your system.
CURRENT Shows the day and time the SHOWME command was
entered, as tracked by the system.
LOGON Shows the day and time you that logged on.
CONNECT MINUTES Shows how many minutes have passed since you logged
on.
CPU SECONDS Shows the amount of processing time used by a job
or session.
$STDIN LDEV This logical device number (here it is 107, a
number assigned by the computer) tells your MPE/iX
system which terminal you are using in your
session.
$STDLIST LDEV This logical device number tells your MPE/iX system
where file listings are to be sent during your
current session. In this instance, it is shown as
107, the same number as your terminal.
Your LDEV number, session number, and logon identity are important.
Knowing what version is on your system helps your system operator or
system manager to help you with any difficulties.
Basic keyboard use
Some commands may require that you know a few basic techniques for
controlling your terminal.
Terminal screen scrolling.
If you have ever sat through the credits at the end of a movie and the
words scrolled up too fast to read, you know why you want to be able to
control the scrolling on your terminal.
The SHOWJOB command lists all of the users of your MPE/iX system who are
currently logged on to a session or running jobs. Since different HP
3000s can accommodate from a few to hundreds of users at one time, some
of the entries may scroll up and away too fast.
One solution.
STOP If your terminal has a STOP key, this is the key to
use.
If text is scrolling too fast to read, press STOP.
The text will stop moving.
STOP If you have stopped the text, press STOP one more
time to start the scrolling again.
Another solution.
CTRLS If your terminal does not have the STOP key, press
CTRL and hold it down. While holding it down,
press S. This will stop the scrolling.
CTRLQ If your terminal does not have the STOP key, press
CTRL and hold it down. While holding it down,
press Q. This resumes the scrolling.
NOTE If you stop the scrolling with CTRLS or with STOP, you can examine
the text on the screen, but you cannot issue any other commands
until you start the screen again with CTRLQ or another STOP.
Advanced Users
The STOP key may or may not work on some PC emulator terminals.
The SHOWJOB command
The SHOWJOB command displays the identities of sessions and jobs
currently logged on to the computer.
Enter:
SHOWJOBReturn
Your screen will display something like this:
________________________________________________________________________
| |
| |
| JOBNUM STATE IPRI JIN JLIST INTRODUCED JOB NAME |
| |
| #S116 EXEC 101 101 FRI 9:57A DONNA.HOLLAND |
| #S118 EXEC 107 107 FRI 3:57P JOHN.SMITHERS |
| #S119 EXEC QUIET 109 109 FRI 4:02P LEDGER.ACCNTNG |
| #J13 EXEC 10S LP FRI 3:00P DONNA.HOLLAND |
| |
| 4 JOBS: |
| 0 INTRO |
| 0 WAIT; INCL 0 DEFERRED |
| 4 EXEC; INCL 3 SESSIONS |
| 0 SUSP |
| JOBFENCE= 7; JLIMIT= 60; SLIMIT= 60 |
| |
________________________________________________________________________
SHOWJOB may produce much more information than this; but, for the moment,
a small example is enough.
Notice that in the example of a SHOWJOB screen, the computer counts jobs
and sessions together as JOBS when it totals this information. Notice
that Donna Holland is using an interactive session and a job
simultaneously. She is working on some project using Session 116
(#S116). She is also letting the computer execute a job file identified
as Job 13 (#J13).
Notice, too, that someone has logged on using the identity
LEDGER.ACCNTNG. A logon identity does not have to be the name of a
person.
User-defined commands andcommand files
You can create other files besides jobs that contain commands and data
for immediate execution. One kind of file is called a user-defined
command (UDC for short). The other kind is called a command file.
Together they are referred to as user commands. They can be used during
sessions.
Jobs and user-defined commands are topics for the 900 Series HP 3000:
Advanced Skills course. Module 6 introduces command files.