I'm confused. To me the > has always meant to take what is to the left of the sign and redirect its output to whatever is to the right. In my case this would mean taking the output of uniq dup_num and redirecting it. Can you set me straight? -- Bill
Stone <[EMAIL PROTECTED]> writes: >The redirection takes place before your command. So basically what >you told the system to do was: > >1. Create the file dup_num. If the file exists overwrite it. >2. Redirect stdout of "uniq dup_num" into dup_num. > >Since you'd already overwritten the data in dup_num, there was nothing >for uniq to process. > >On Tue, 28 Sep 2004 11:09:12 -0400, William Stanard ><[EMAIL PROTECTED]> wrote: >> 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 Bill Stanard Academic Computing Palmer Trinity School 305.969.4239 - 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
