In doing a demo before a class (Linux Red-hat 2.4.18-14), I used the uniq command on a file (dup_nums) that consisted of twelve lines, each line containing a number, from one to 9. I repeated the numbers, 6, 8, and 9. The std output showed the expected list of numbers, all duplicates removed. At a student's suggestion, I ran uniq again, but this time directed the output to the file itself....
uniq dup_num > dup_num ...and, lo and behold, the file dup_num was empty. I checked uniq --help, info uniq, and man uniq, all to no avail. Shouldn't uniq have removed the duplicate numbers and written one through 9 to the file? Bill stanard - To unsubscribe from this list: send the line "unsubscribe linux-newbie" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.linux-learn.org/faqs
