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Operating System Practical 3: Shell Scripting for File Comparison and Number Combinations , Exercises of Operating Systems

Nirma UniversityOperating Systems
Prof. Umesh Bodkhe

The subject name, code, and instructions for practical 3 of the operating system course (2cs304). The practical includes writing a shell script to compare the contents of two files and another script to generate all combinations of three numbers. The code and input-output examples are provided.

What you will learn

  • What is the shell script to generate all combinations of 1, 2, and 3?
  • How to write a shell script to compare the contents of two files?
  • Explain the logic behind the number combination shell script.

Typology: Exercises

2019/2020

Uploaded on 09/12/2021

mkv-patil
mkv-patil 🇮🇳

1 document

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Subject Name and Code: Operating System (2CS304)
Practical 3:
a) Write a shell script to compare the contents of two files.
Code:
file1="/home/priyal/test1.txt"
file2="/home/priyal/test2.txt"
if cmp -s "$file1" "$file2"; then
printf 'The file "%s" is the same as "%s"\n' "$file1" "$file2"
else
printf 'The file "%s" is different from "%s"\n' "$file1" "$file2"
Fi
Input and Output:
b) Write a shell script to generate all the combinations of 1, 2 and 3.
pf3

Partial preview of the text

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Subject Name and Code: Operating System (2CS304)

Practical 3:

a) Write a shell script to compare the contents of two files. Code: file1="/home/priyal/test1.txt" file2="/home/priyal/test2.txt" if cmp -s "$file1" "$file2"; then printf 'The file "%s" is the same as "%s"\n' "$file1" "$file2" else printf 'The file "%s" is different from "%s"\n' "$file1" "$file2" Fi Input and Output: b) Write a shell script to generate all the combinations of 1, 2 and 3.

Code: echo "Enter three numbers" read a read b read c for i in $a $b $c do for j in $a $b $c do if [ $j != $i ] then for k in $a $b $c do if [ $k != $i ]&&[ $k != $j ] then echo $i $j $k; fi done fi done Done Input and Output: