Ex. No. :1
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BASIC UNIX COMMANDS
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AIM:
To implement the basic UNIX commands.
BASIC UNIX COMMANDS:
- Command: W
Syntax : W
Description : Tells you who's logged in, and what they're doing right at the moment.
Example : W
Output :[root@localhost student]# w
12:14:48 up 2:10, 3 users, load average: 0.00, 0.00, 0.00
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
student pts/1 192.168.11.87 10:21am 2:53 0.16s 0.06s vim dirfile.sh
root :0 - 11:36am ? 0.00s 0.36s /usr/bin/gnome-
student pts/2 192.168.11.86 12:03pm 0.00s 0.02s 0.00s w
[root@localhost student]#
2. Command: Who
Syntax : who
Description : Tells you who's logged on, and where they're coming from.
Example : who
Output :
[root@localhost student]# who
student pts/1 Nov 13 10:21 (192.168.11.87)
root :0 Nov 13 11:36
student pts/2 Nov 13 12:03 (192.168.11.86)
[root@localhost student]#
Command: Who am i
Syntax : who am i
Description : returns your username.
Example : who am i
Output :[root@localhost student]# who am i
student pts/2 Nov 13 12:03 (192.168.11.86)
[root@localhost student]#
Command: finger
Syntax : finger filename
Description : gives you lots of information about that user, e.g when they last read their mail and whether they're logged in.
Example : finger it staff
Output :
[root@localhost student]# finger student
Login:student Name: (null)
Directory: /home/student Shell: /bin/bash
On since Thu Nov 13 10:21 (IST) on pts/1 from 192.168.11.87
1 second idle
On since Thu Nov 13 12:03 (IST) on pts/2 from 192.168.11.86
1 second idle
No mail.
No Plan.
[root@localhost student]#
Command: passwd
Syntax : passwd
Description : lets you change your password, which you should do regularly.
Example : passwd
Output:
[root@localhost student]# passwd
Changing password for user student.
Changing password for student
(current) UNIX password:
New password:
Retype new password:
passwd: all authentication tokens updated successfully
Command: date
Syntax : date
Description : Displays the date month and time.
Example : date
Output :
[root@localhost student]# date
Thu Nov 13 14:54:42 IST 2008
[root@localhost student]#
Command: cal
Syntax : cal [month] [year]
Description :
Example 1 : cal
Output :[root@localhost student]# cal
November 2008
Su Mo Tu We Th Fr Sa
1
2 3 4 5 6 7 8
9 10 11 12 13 14 15
16 17 18 19 20 21 22
23 24 25 26 27 28 29
30
Command: id
Syntax : id
Description : The id command is used to display the numerical value that corresponds to your login name.
Example : id
Output :[root@localhost student]# id
uid=539(student) gid=540(student) groups=540(student)
Command: clear
Syntax : clear
Description : clears the screen of your terminal.
Example : clear
Output :[root@localhost student]# clear
Command: tty
Syntax : tty
Description : let you know your terminal name.
Example : tty
Output : [root@localhost student]# tty
/dev/pts/1
Command: bc
Syntax : bc
Description : Can be used as calculator
Example : bc
Output :
[root@localhost student]# bc
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
12+5
17
Command: pwd
Syntax : pwd
Description : Displays the absolute path name of the currtntly working directory.
Example : pwd
Output :[root@localhost student]# pwd
/home/student
RESULT:
Thus, the basic commands in UNIX are analyzed.
--
Don't ever give up.
Even when it seems impossible,
Something will always
pull you through.
The hardest times get even
worse when you lose hope.
As long as you believe you can do it, You can.
But When you give up,
You lose !
I DONT GIVE UP.....!!!
with regards
prem sasi kumar arivukalanjiam
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