aix - using system

7/24/2019 AIX - Using System

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Unit 2

Using the System


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Objectives

After completing this unit, students should be able to:

Log inand outof the system

State the structureof AIX commands

Execute basic AIX commands

Use AIX commands to communicatewith other users


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Logging In and Out

To Log in:

login: team01team01's Password: (the password does not appear)

$ _

To Log out:

$ (or)

$ exit (or)

$ logoutlogin: _


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Passwords

Creatingor Changing:

$ passwd

Changing password for "team01"team01's Old password :team01's New password:Enter the new password again:

$ _


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Command Format

AIX commands have the following format:

$ command option(s) argument(s)

$ mail -f newmail


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Command Format Examples

RIGHT: WRONG:

1. Separation:

$ mail -f newmail $ mail - f newmail

$ who -u $ who-u

2. Order:

$ mail -f newmail $ mail newmail -f

$ mail team01 $ team01 mail

$ who -u $ -u who

3. Multiple Options:

$ who -m -u $ who -m-u

$ who -mu $ who -m u

4. Multiple Arguments:

$ mail team01 team02 $ mail team01team02

THERE ARE EXCEPTIONS!!


7/19

date and cal Commands

Checking the date:

$ date

Fri Jan 14 10:15:00 GMT 2000

Looking at a month:

$ cal 1 2000

January 2000Sun Mon Tue Wed Thu Fri Sat 12 3 4 5 6 7 89 10 11 12 13 14 15

16 17 18 19 20 21 2223 24 25 26 27 28 29

30 31

Looking at a year:

$ cal 2001


8/19

The clear, echo, and banner Commands

clear: Clears the terminal screen

$ clear

echo: Writes what follows to the screen

$echo Lunch is at 12:00

Lunch is at 12:00

banner: Writes character strings in large letters to the screen

$banner Hello


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Activity: Questions and Answers

1. What's wrong with the following commands?

$ du -s k

$ df-k

$ du -a-k

2. Which command ...

... changes your password ?

... clears the screen ?

... prints out the current system date ?

... exits the current shell ?


10/19

The who and finger Commands

Finding who is on the system:

$whoroot lft0 Sept 4 14:29team01 pts/0 Sept 4 17:21

Finding who you are:

$who am iteam01 pts/0 Sept 4 17:21 (or)

$whoamiteam01

finger: Displays information about the users currently logged on

$ finger team02Login name: team02

Directory: /home/team02 Shell: /usr/bin/kshOn since Mar 04 16:17:10 on tty3No Plan.

S di M il


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Sending Mail

$mail team01

Subject: Meeting

There will be a brief announcement meeting today

in room 602 at noon.

Cc:

$mail team20@sys2

Subject: Don't Forget!

Don't forget about the meeting today!

Cc:

R i i M il


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Receiving Mail[YOU HAVE NEW MAIL]

$ mailMail [5.2 UCB] [AIX4.1] Type ? for help

"/var/spool/mail/team01": 2 messages 1 new

U 1 team05 Tues Jan 4 10:50 10/267 "Hello !"

>N 2 team02 Wed Jan 5 11:25 16/311 "Meeting"

? t 2

From team02 Wed Jan 5 11:25 2000Date: Wed 5 Jan 2000 11:25

From: team02

To: team01

Subject: Meeting

Cc:

There will be a brief announcement meeting today in room 602 at noon.

? d (Delete message)? q (Quit mail command)

it d ll


13/19

write and wall

write: Send messagesto other userson a system

$ write team01 (or) $ write sarah@moon

write provides conversation-like communication with anotherlogged-in user. Each user alternatively sends and receivesmessages.

The wallcommand writes to all terminals. This is useful to notify allusers of a system event:

For example:

$ wall The system will be inactive from 10 pm today.

t lk With A th U


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talk With Another User

$ talk fred

(user fred will receive the following message)

Message from TalkDaemon@sys1 at 16:03 ...

talk: connection requested by john@sys1

talk: respond with: talk john

(to accept the invitation fred enters:)

$ talk john

mesg


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mesg

The mesgcommand controls whether other users on the systemcan send messages to you:

$mesg n Refuses messages

$mesg y Permits messages

Keyboard Tips


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Keyboard Tips

Corrects mistakes

Terminates the current

command and returns to the

shell

End of transmission or end

of file

Temporarily stops output to

the screen

Resumes output (stoppedby Ctrl-s)

Erases the entire line

Next Step


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Next Step ...

Exercise 1

Unit 2: Checkpoint


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What is the correct command syntax in AIX?

$ mail newmail -f$ mail f newmail$ -f mail

$ mail -f newmail

What command would you use to send mail items? _____________________________________________________

What are other commands that can be used to communicate with

other users? _____________________________________________________

What output would you expect from the following command: cal8? _____________________________________________________

Which command would you use to find out when a particular userlogged in?$ who am i

$ who$ finger everyone$ finger username

Unit 2: Checkpoint

Summary


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Summary

AIX commands can use multiple options and argumentsand must follow proper syntax rules

There are many simple, yet powerful commands suchas:datecalwho, who am i

fingerechoclear

bannerwc

Communicate with other UNIX users using commands

such as mail, write, talk, and wall

aix - using system

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