Shell script to check whether user has logged in or not, Programming Languages

Assignment Help:

W.A.S.S to check whether user has logged in or not.

 

Program

 

# W.A.S.S to check whether user has logged in or not.

 

echo "Enter the user name:"

read usr

flag=0

for w in ` who | tr -s " " | cut -d " " -f1`

do

if test $usr = $w

then

echo "User is logged in.."

flag=1

fi

done

 

if test $flag = 0

then

            echo "User is Not logged in.."

fi

 

Output:

 

Enter the user name:

root

User is logged in..

 

Enter the user name:

narenda

             User is Not logged in


Related Discussions:- Shell script to check whether user has logged in or not

Define a prolog predicate that asserts list, Define a Prolog predicate flat...

Define a Prolog predicate flatten(List, FlattenedList)  that asserts List  is any nested list of atoms and  FlattenedList  is the same list with the nesting removed. The atom [] sh

Develop a program on behavior of hospital personnel, A psychologist is inte...

A psychologist is interested in learning about the voting behavior of college students.  (4 points for each part.)Design a study which would yield data on this topic. a. state y

Document type definition schema, Create a DTD which describes the structure...

Create a DTD which describes the structure of the document which you prepared in Question 1. Make sure that you use all appropriate DTD ingredients to constrain valid documents as

Explain the different states of activity diagram, Question 1 Discuss on In...

Question 1 Discuss on Inheritance Question 2 What are the four phases of the object modeling technique that can be repetitively executed? Question 3 Explain the di

Vb, sir can you help me visual basic 6.0 project solution

sir can you help me visual basic 6.0 project solution

Write a program to read a text file and create a dictionary, Write a progra...

Write a program to read a text file and create a dictionary. The keys for the dictionary should be all 26 letters of the alphabet and the values of the dictionary should be the lis

Explain the do - while statement - computer programming, Explain the Do - W...

Explain the Do - While Statement - Computer Programming? A do - while loop is an exit controlled loop and the body of the loop gets executed at least once if the condition is n

Program to explore page replacement algorithms, Objective: The purpose of ...

Objective: The purpose of this programming project is to explore page replacement algorithms. This can be accomplished by developing a simple simulator that implements various pag

Complementary slackness and duality, Consider the following LP problem: ...

Consider the following LP problem: min x 1 +3 x2 +x 3 -x 4 s.t. x 1 +x 2 +x 3 +x 4 ≥ 0 x 1 +x 2 -x 3 -x 4 ≥ 1 x 2 , x 3 ≥ 0 x 1 , x 4 ≤ 0. 1. Unique pr

Design entry using the graphical editor, In this activity, you are going to...

In this activity, you are going to place components on a sheet and connect them with virtual wires to create a simple digital circuit. You will simulate the circuit to verify the c

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd