HP 3000 Manuals HP 3000 Manuals
Starting a Session
Logging on with the HELLO command starts a computer session--a dialog
between you and the computer--and permits you to give instructions at
your terminal, one at a time, to the computer. The computer attempts to
carry out each instruction as soon as it can.
If you enter something that the computer does not understand, or that it
cannot for some reason execute, the computer will inform you by
displaying an error message on your video terminal. Receiving an error
message does not mean that you were wrong. You may have intended to
enter exactly what you entered. It does mean that the computer has found
something about your entry that does not fit the rules that it must obey.
This is a simple log on:
HELLO JOHN.ANYACCT,MYGROUPReturn
HELLO is the command to log on and start a session.
Here the user JOHN is starting a session and opening the group called
MYGROUP in the account called ANYACCT.
Notice the order in which the log on is specified.
HELL0 JOHN .ANYACCT ,MYGROUP
command user name account name group name
________________________________________________________________________
|This order is vital, and so is the punctuation (the period before |
|ANYACCT and the comma before MYGROUP). Computers are strict about |
|order and about punctuation. |
________________________________________________________________________
When you log on
If passwords are required, the computer will ask (prompt you) for each of
them, one at a time, and wait for your response. In that case, you would
have to enter each password correctly in response to the computer's
request.
The passwords that you type will be invisible to you and to everyone
else. The computer will read what you enter, but it will not display the
passwords on your video terminal as you type them. This prevents others
from looking over your shoulder to discover the passwords that you are
using.
________________________________________________________________________
|The computer limits you to three consecutive attempts at logging on |
|with any one logon identity (user.account,group) or three attempts at |
|any one password. After three consecutive failures at any one logon |
|identity or at any one password, the computer will close its |
|communication with you--another security provision designed to keep |
|unauthorized persons from using the computer. |
| |
|You must then reestablish communication with the computer in order to |
|try again. How you establish this communication depends upon the |
|electronic communications method established when your computer is set|
|up at your site. |
________________________________________________________________________
I have logged on--now where am i?
This is one way of logging on:
HELLO JOHN.ANYACCT,MYGROUPReturn
Logging on this way opens one "drawer" of a computer "filing cabinet."
* The filing cabinet that you opened is called ANYACCT.
* The specific drawer that you opened is called MYGROUP.
Here is another way of logging on:
HELLO JOHN.ANYACCTReturn
Logging on this way opens still another drawer--a rather special
drawer--in the filing cabinet called ANYACCT. But that is a subject for
"Logging on Without a Group".
But where are the filing cabinets in the computer?
The address of files.
Accounts (the filing cabinets), their groups, and the files within those
groups are kept on the computer's disk or disks, which correspond to file
rooms in an office.
The log on does not by itself give you direct access to any particular
file. Rather, it specifies a group in an account where the file is to be
found.
If a file called MYREPORT is found in the MYGROUP drawer of the ANYACCT
filing cabinet, its full address (location) is this:
MYREPORT.MYGROUP.ANYACCT
------------------------------------------------------------------------------------------
| |
| MYREPORT MYGROUP ANYACCT |
| |
| file name group name account name |
| |
| file drawer cabinet |
| |
------------------------------------------------------------------------------------------
The full names of files.
It happens--and not at all by accident--that the complete address
(location) of a file in the account structure is exactly the same as its
full name.
MYREPORT.MYGROUP.ANYACCT
________________________________________________________________________
|When a file name is shown in this fashion, it is called a fully |
|qualified file name, and it is the full and correct address of the |
|file. For the computer, this is the equivalent of saying: |
| |
| |
| * the file MYREPORT...(file) |
| |
| * in the group MYGROUP (group)... |
| |
| * in the filing cabinet called ANYACCT (account) |
________________________________________________________________________
There might be many files in the same group of the same account. These
three files are found in the same group and account in the account
structure:
ACCTRPT.MYGROUP.ANYACCT
BUDGRPT.MYGROUP.ANYACCT
TAXRPT.MYGROUP.ANYACCT
Each has the same group name and account name. But each has a unique,
fully qualified file name. Each has a unique address or location in the
computer. It must be so--two files cannot have the same fully qualified
file name on the same disk.
When would you use the fully qualified name (address) of a file? You
would use it whenever you need access to that file but you are not logged
on in the right group or account.
________________________________________________________________________
|Access to a file is governed by the security provisions in effect |
|on your computer. While you may be able to find a file, you |
|might--or might not--be able to see it, copy it, use it, or change |
|it. |
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Where is that file?
The day will come when you want to find a file and you cannot remember
where it is. Unlike the filing cabinet in the corner of your office, the
computer can tell you where to find a file, provided the file exists.
If you remember the first name of the file, the computer can find it
quickly. If you remember only a part of the name, the computer can still
find it--or at least show you file names that are close to the one that
you are searching for.
The LISTFILE command does the searching.
If you did not know where to find the TAXRPT program, you would use
LISTFILE TAXRPT.@.@,6 to locate it. If TAXRPT is found on the system,
the LISTFILE command will tell you which group and which account contain
TAXRPT.
* @ is a wild card character, an all-purpose name hunter. To the
computer, @ means "any combination of characters, numbers, or
letter--as few as none, as many as eight."
LISTFILE TAXRPT.@.@ tells the computer: "Look for the TAXRPT
file. Look in every group. Look in every account."
* 6 is a code for the LISTFILE command. Its meaning is "display the
fully qualified file name(s) (file name.group name.account name)
of any file(s) you find."
This command could also be entered as
LISTFILE TAXRPT.@.@,QUALIFY
QUALIFY has the same meaning as 6 for LISTFILE.
You might, however, have many file names that begin with the letters T A
X R P T--TAXRPT91, TAXRPT92, TAXRPT93.... And, you might recall that all
of them are in the ANYACCT account.
If that were the case, you could enter this:
LISTFILE TAXRPT@.@.ANYACCT,QUALIFY
This tells the computer: "Look for any file name beginning with TAXRPT,
in any group, in the ANYACCT account."
Suppose, however, that the files were named this way: JNTAXRPT,
FBTAXRPT, MRTAXRPT, MYTAXRPT....
In that case, enter this:
LISTFILE @TAXRPT.@.ANYACCT,6
"Look for any file names that end in TAXRPT in any group in the ANYACCT
account."
You might, as an experiment, enter this command:
LISTFILE @.@.@,QUALIFY
This will find--and display--the fully qualified names of all of the
files on your system. The list could be quite long, and the display
could take time. Pressing Break will break the command and its display
and return the prompt to your screen.
________________________________________________________________________
|Many commands--but not all of them--respond to pressing the Break key.|
|Pressing Break terminates some commands and merely suspends others. |
|You may use the ABORT command to terminate the suspended command. You|
|may use the RESUME command to resume the operation of a suspended |
|command. |
________________________________________________________________________
LISTFILE options.
With this release, LISTFILE contains additional ways to display
information about files. For more information and examples, refer to the
book Commands Reference - HP 3000 Series 9X8LX (B3813-90011).
User names, such as JOHN, have no bearing on the location of a file, a
group, or an account. They are, however, indispensable for logging on to
an account.
Equally important, when you combine a user name with an account name
(JOHN.ANYACCT), you identify the creator and "owner" of a file.
Whoever logs on using JOHN.ANYACCT and creates a file--in any group in
the ANYACCT account--is identified as the creator and owner of that new
file.
________________________________________________________________________
|You, as a person, are not the owner of this new file. The owner of |
|this newly created file is JOHN.ANYACCT--the log on identity used when|
|the file is created. |
________________________________________________________________________
Someone logging on with ALICIA.ANYACCT might be unable to use the newly
created file--unless the owner identified as JOHN.ANYACCT uses the
RELEASE command to suspend the normal security on that file. Security is
restored to that file only after JOHN.ANYACCT uses the SECURE command.
Ownership information is attached to the computer's record of any file
that JOHN.ANYACCT creates. ALICIA.ANYACCT might create files, too, and
the computer would know that certain files "belong" to ALICIA.ANYACCT and
that others "belong" to JOHN.ANYACCT.
User names have still another purpose that is described in "Logging on
without a group" and in "Capabilities" in Chapter 4.
Session names
Still another kind of name might be found in a log on. In this example,
the word BUDGET has been added:
HELLO BUDGET,JOHN.ANYACCT,MYGROUPReturn
BUDGET is a session name.
A session name has no bearing on the location of a file, group, or
account. It has no bearing on the user name JOHN, either. So what is
its value?
It is entirely possible to find that two or more people have logged on to
the same group, in the same account, using the same user name (HELLO
JOHN.ANYACCT,MYGROUPReturn).
If more than one person has logged on to a group using the same user
name, each might add a different session name to his or her log on to
help minimize confusion. In most cases, your printer will add any
session name to the banner page that precedes each print out (as well as
the log on identity of the user doing the printing).
Session names are a convenience for the people using the computer. The
computer will not become confused if two different people log on using
the same user name, the same account name, and the same group name, even
if those people neglect to use a session name. Every time someone logs
on to the computer, the computer starts a new session and assigns that
session a unique session number (such as #S373). You will see session
numbers if you use the SHOWJOB command.
You may choose any session name that you like when you log on, provided
the name begins with a letter is followed by no more than seven other
letters or numbers, or a combination of letters and numbers.
________________________________________________________________________
|There is no requirement to include a session name when you log |
|on. |
________________________________________________________________________
Password protection
Ownership is one form of protection for files. Using passwords is
another form of protection.
Passwords may be attached to the following parts of a logon:
* a user name
* an account name
* a group name
------------------------------------------------------------------------------------------
| |
| Logon Account Structure Possible Password |
| Element Element (examples) |
| |
------------------------------------------------------------------------------------------
| |
| BUDGET session name none possible |
| |
| JOHN user name ACACIA |
| |
| ANYACCT account name FIN91 |
| |
| MYGROUP group name RPT91 |
| |
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Like other names used to identify files or to log on, a password may
consist of as few as one or as many as eight characters. The first
character must be a letter of the alphabet. Any remaining characters may
be letters or numbers or a combination of them.
The person in charge of your computer system may change or remove account
passwords. The person in charge of an account, may change or remove
group passwords. Unless you are one of these people, you cannot remove
or change the passwords attached to an account or to a group.
You may, however, use the PASSWORD command to change the password
attached to your own user name.
Logging on without a group
This log on puts you in the MYGROUP group of the ANYACCT account:
HELLO JOHN.ANYACCT,MYGROUPReturn
This log on puts you in some group of the ANYACCT account:
HELLO JOHN.ANYACCTReturn
But in which group do you find yourself?
Where that log on takes you depends upon two factors:
* which user name (of those attached to the account) you use
* which group is assigned to that user as a home group
Recall that user names are attached to accounts. In turn, a home group
may be attached to a user name.
A home group may be any existing group within the account. When a home
group is attached to a user name, that group becomes the default log on
group for that user name.
HELLO JOHN.ANYACCTReturn is an example of a default log on. The user
JOHN did not specify the name of a group. As a result, this log on leads
into the ANYACCT account and--by default--into the home group for the
user JOHN.
If the home group for user JOHN is the MTKG group, then this log on
HELLO JOHN.ANYACCT
is equivalent to--and has the same effect as--this log on:
HELLO JOHN.ANYACCT,MKTG
If no home group has been assigned to JOHN, then HELLO JOHN.ANYACCT will
fail.
Shared group
It is fairly common to designate one group within each account that is
open to all users who log on to that account. This "shared" group is
open to anyone who can log on to the account.
A shared group provides a "place" for any programs and files that deserve
to be available to all of the users of an account. A shared group
belongs to all of the users of that account.
Those users do not need to specify the password for the shared group when
they log on to that group. Of course, they may still need to be able to
enter the passwords for the user name and the account name.
________________________________________________________________________
|One common convention is to allow PUB to be the shared group. PUB is |
|an abbreviation for the English word "public," as in "a public park," |
|a park open to everyone. Every account that is created on your system|
|automatically has a PUB group. |
| |
|It is not unusual to make the shared group the home group for one or |
|more users of an account. |
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