how to get the header of a csv file and print it as a column using linux?

Question

I am trying to get the header or the first line of a csv file and print it as a column.

file example: test.txt name^lastname^address^zipcode^phonenumber

expected result:

name
lastname
address
zipcode
phonenumber

Answer 1

Just do this

head -n1 test.txt | tr , '\n'

Answer 2

head prints n lines of a file, tr replaces all occurrences of a first char with a second char

head -n1 test.txt | tr '^' '\n'