Description

Write a script using any of the bash tools including grep and sed, that given a file with the lines inside it having a comma-separated format, writes the fields of the line by reversing each pair of fields. Note that the fields
themselves remain the same.

Sample input:
23,A,49,B,2,C
25,B,27,D,8,
34,B,,F

Sample output:
A,23,B,49,C,2
B,25,D,27,,8
B,34,F,

Note carefully the last two lines.

2. (50 marks)

You need to write a script using any bash tool including grep and sed to automate the matching of TAs to students in different days.

A little bit more detail:

Suppose there are n students, m tas and d lab days (all numbered from 1 to …).

There will be a list that dictates which student can take which lab day.
Create this list as a one-time measure using randomisation.

Additionally, give the students slots starting from time t with a gap of g minutes each.

Running this script every week will solve the problem.

You can use *only* bash tools including grep, sed and awk.

Sample input:

n = 11 m = 4
d = 2
File f:
70 30 t = 2:00pm g = 10 min

Sample output:

Students to lab days:

Day 1 students:
11
9
1
2
6
4
10
8

Day 2 students:
7
3
5

Day 1 mapping:
3 11 2:00
3 9 2:10
3 1 2:20
4 2 2:00
4 6 2:10
4 4 2:20
1 10 2:00
1 8 2:10

Day 2 mapping:
2 7 2:00
2 3 2:10
2 5 2:20

Hint: Look at sort options.