Write a bash program that accepts a file name as a command line argument. Then c

Question

Write a bash program that accepts a file name as a command line argument. Then check to see if the file is included in the current working directory. If the file is NOT in the current working directory, add the file to the current working directory. (Hint: Look at the UNIX “touch” command). Now that we “know” that the file is in the current directory, prompt the user to say whether they want the file deleted. A “simple” yes or no should suffice. However, for yes accept any of:

Yes

yes

y

and for no, accept any of:

No

no

n

If your program receives an acceptable input (for yes or no) delete the file if appropriate. Write a message to indicate whether the file is deleted or not. However, if your program does NOT get a “valid” yes or no, write a message indicating that and ask the user to try again (again with an appropriate prompt). Your program should be able to try THREE times to get an acceptable yes or no but quit after the third incorrect input, again with an appropriate message, of course.

should work in UNIX

Explanation / Answer

#!/bin/bash

file="./file"

if[-e $file]; then

echo"file exists"

else

echo "file does not exists"

fi

#!/bin/bash

PS3='choose one option:'

#print to stdout

echo "1.keep"

echo"2.Delete"

echo -n "please choose a word[1 or 2]?"

#read userinput

read choice

#bash nested ifelse

if[$choice -eq 1];then

echo "you have choosen keep"

#print to stdout

echo "1.Yes"

echo "2.yes"

echo "3.y"

echo -n "please choose a word[1,2,or 3]?"

#read user input

read choice

#bash nested ifelse

if[$choice -eq1],then

echo "you have choosen Yes"

else

if[$choic -eq2], then

echo "you have choosen yes"

else

echo "you choosen y"

fi

fi

fi

else

echo "you have choosen Delete"

#print to stdout

echo "a.No"

echo "b.no"

echo "c.n"

echo -n "please choose a word[a,b,or c]?"

#read user input

read choice

#bash nested ifelse

if[$choice -eq a],then

echo "you have choosen No"

else

if[$choic -eq b], then

echo "you have choosen no"

else

echo "you choosen n"

fi

fi

fi

#!/bin/bash

Count=0

#bash until loop

until[$Count -gt2];do

if[$Choice -eq1=$Choice -eq2=$Choice -eq3]then

echo "Your file is with you"

else

echo "your file is deleted"

let Count=Count+1;

fi

#!/bin/bash

Count=0

#bash until loop

until[$Count -gt2];do

if[$Choice -eqa=$Choice -eqb=$Choice -eqc]then

echo "Your file is Deleted"

else

echo "your file is with you"

let Count=Count+1;

fi

done

Assumed output:

linuxconfig.org:~$touch file

linuxconfig.org:~$ls

file filestring.sh

linuxconfig.org:~$./filestring.sh

file exists

linuxconfig.org:~$

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