OS Lab Questions

Just-in-case.txt

OS Lab 2
1.    Display your login name, date ,who is the currently logged in user and home directory

 

2.    Display sum of two integers

 

3.    Create a file student.txt 3 in cse 3 in mech

 

Rollno|name|dept

 

Add 6 records

4.Display the number of records in student.txt

5 sort the file according to student name

6.Display student name and dept

7. Display students whose names begins with k

8. Display last two students

9. Create a soft link for the file created.

10.Count the number of processes in the system


Answers:


1. who;cd ~;pwd
2. a=10;b=20;echo `expr $a + $b`
3. cat > students.txt
1|A|CSE
2|B|MECH
3|C|CSE
4|D|MECH
5|E|MECH
6|F|CSE
4. cat students.txt|wc --lines
5. cat students.txt|cut -f 2 -d\||sort
6. cat students.txt|cut -f 2,3 -d\|
7. cat students.txt|grep \|k
8. cat students.txt|tail -n 2
9. ln -s students.txt lol.test
10. ps aux| wc --lines