Write a linux script to add name in class list, Operating System

Assignment Help:

For this exercise I wanted to give you some real-world examples of useful bash scripts. Therefore, you will write a couple of scripts that I actually use in my teaching to automate clerical tasks. To begin, please copy this (ficitious) classlist.txt to your directory, and note that it contains a list of usernames.

bholly

bjones

bscott

dgatton

dhathaway

jbonham

jcroce

jdenver

jhendrix

jjoplin

jmorrison

kcobain

mhutchence

oredding

pcline

rbuchanan

rrhoads

rwaters

svaughan

wwilliams

Write a script called addnames that is to be called as follows, where classlist is the name of the classlist file, and username is a particular student's username.

./addnames classlist username

The script should

1. print a message stating that the name already existed, or

2. add the name to the end of the list.

 Hint: Use a for-loop to process each line in the file. To create a list of lines in the file, remember that you can use any bash construct inside a script that you can use in the terminal window. How would you list the lines of the file in the terminal window? Similarly, how would you append a particular item to the end of an existing file from the terminal window?


Related Discussions:- Write a linux script to add name in class list

Paging, what is the use of valid invalid bits in paging

what is the use of valid invalid bits in paging

Processes and threads, Processes and threads each have their place in multi...

Processes and threads each have their place in multi-programming, generally to hide latency and to maximize CPU utilization. With the continuing spread of multi-core processors in

What are the operations of a directory, Operations that are to be performed...

Operations that are to be performed on a directory are Search for a file: We are able to find all files whose names match a exact pattern. Create a file: New files requi

Us constitution, what branch of goverment were the federal courts are?

what branch of goverment were the federal courts are?

Sector sparing, What is sector sparing is proper definition

What is sector sparing is proper definition

Bag of tasks, The producer-consumermodel above has a standard human analogy...

The producer-consumermodel above has a standard human analogy of an assembly line. Humans have specialized skills, however, whereas threads running the same program do not need to

Estimate the continued transfer rate of drive, Q. The term "fast wide SCSI...

Q. The term "fast wide SCSI-II" signifies a SCSI bus that operates at a data rate of 20 megabytes per second when it moves a packet of bytes among the host and a device. Presume t

Read - write cycles of microprocessors, Examining the write/cycles as shown...

Examining the write/cycles as shown below We can see that the bus is designed for asynchronous read/write cycles. The operation of the write cycle is simple in that the add

Explain the proper distribution of functionality and code, Explain the Prop...

Explain the Proper Distribution of Functionality and Code It is important to note that the bandwidth of the server operating system and server processor availability is fixed.

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