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

Explain the booch methodology, Problem 1 Explain the Booch Methodology ...

Problem 1 Explain the Booch Methodology 2 Why does every interaction diagram need a written description? Explain 3 Explain the five core workflows of the Unified Process

Explain the use of sync and fsck, Problem 1 Define the architecture of ...

Problem 1 Define the architecture of UNIX operating system with appropriate diagram Problem 2 Define the term inter-process communication. What are several approaches t

System calls, #questiWrite down different system calls for performing diffe...

#questiWrite down different system calls for performing different kinds of tasks.on..

Shell script to delete all files from system have size zero, Normal 0 ...

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

Developing a preprocessor for java, How and where to start to develop a pre...

How and where to start to develop a preprocessor for java

Write the dual of the max flow problem, 1. Write the dual of the above max-...

1. Write the dual of the above max-?ow problem. 2. Solve both problems with AMPL, and for each print the values of the vari- ables and the values of the dual variables (if a p

Depth estimation, depth estimation from block matching algorithm motion est...

depth estimation from block matching algorithm motion estimation

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

Statistical parametric mapping, A large offshore accommodation barge is to ...

A large offshore accommodation barge is to be converted into a floating luxury hotel.  It will be connected to a single point mooring buoy (SPM) in a beautiful inland loch where th

Software application, Does anyone know anything about java programming here...

Does anyone know anything about java programming here?

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