Hi!

I have a trouble with the sort and the uniq.
I know I have to use them, I just have trouble with putting them in the right order.

I have a text file with unsorted lines (each line has a few words, the first word in the line is a number.).

I need to sort this file in order to be able to use the uniq command.

I tried to write it like this:

(I wrote the -n option because the first string in each line is a number. Is it okay?)

but when I cat the file it's not changed, and furthermore, the output is doubling a few lines not necessarily.

What is wrong?

Thanks,
Shira.