Linux shell sort file according to the second column?

Question

I have a file like this:

FirstName, FamilyName, Address, PhoneNumber

How can I sort it by FamilyName?

Answer 1

To sort by second field only (thus where second fields match, those lines with matches remain in the order they are in the original without sorting on other fields) :

sort -k 2,2 -s orig_file > sorted_file