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`

if test $usr = $w

then

echo "User is logged in.."

flag=1

done

if test $flag = 0

then

echo "User is Not logged in.."

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

Genetic algorithm, I need help I want to implement the Genetic Algorithm f...

I need help I want to implement the Genetic Algorithm for Shortest path Kindly Help me I will be thankful to you

Write your own version of the strcmp function string_compare, Write your ow...

Write your own version of the strcmp function string_compare. Supply a main program that will test each of the 3 differing outcomes. int string_compare(char *s, cha

Information management system, Write a detailed description on how you woul...

Write a detailed description on how you would go about planning information system for an organisation

What do you understand by the term postback, Question: (a) What do you...

Question: (a) What do you understand by the term Postback? (b) Describe five benefits of creating virtual directories while developing an ASP.NET application. (c) Exp

Outline the norms to be designing a web page, Question: (a) Outline th...

Question: (a) Outline the six norms to be considered before designing a Web page. (b) Write a program such that when a user right-clicks anywhere on a Web page, the follow

Write an implementation for the prime machine, You should use the BToolkit ...

You should use the BToolkit to produce the answers to the questions below. Where applicable, please use the machine names and identifier names suggested in the question to help me

Matlab help, i(t)=(V/R) * (1-e^-(R/L)(t)) (a) Define an anonymous function...

i(t)=(V/R) * (1-e^-(R/L)(t)) (a) Define an anonymous function answerE that returns i(t) given input t. (b) The final value for the current is 2 amps. Find a time tm when the curr

Define the if - else statement - computer programming, Define the If - else...

Define the If - else statement - computer programming? The If - else statement The universal form of if - else statement is if(expression)

Write a function that will read the atoms for a protein, Write a function r...

Write a function readPDBfile('filename') that will read the atoms for a protein stored in a PDB file, whose name is provided as an input to the function (note that this name should

What do you meant by a function, (a) (i) What do you meant by a function? ...

(a) (i) What do you meant by a function? Are functions required when writing a C program? (ii) State one of the advantages to the use of functions. (iii) What do you meant by a

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages