I have a two-column file; the file is sorted the way I want it on column 1 already. I would like to sort on column 2, within each column 1 category. However,
sort does not understand the sort order of column 1.
The normal way (from similar questions here on stack) would be this:
sort --stable -k1,1 -k2,2n
But I cannot specify the sort on k1, because it is arbitrary.
C 2 C 1 A 2 A 1 B 2 B 1
C 1 C 2 A 1 A 2 B 1 B 2