On 06/25/2010 02:51 PM, Greg Woods was caught red-handed while writing:: > On Fri, 2010-06-25 at 12:33 -0700, JD wrote: > >> On 06/25/2010 12:04 PM, Bill Crawford was caught red-handed while writing:: >> >>> On 25 June 2010 19:38, JD<jd1008@xxxxxxxxx> wrote: >>> >>> >>>> cd /var/lib >>>> sudo tar cjf - rpm> rpm.tar.bz2 >>>> sh: rpm.tar.bz2: cannot create [Permission denied] >>>> >> sudo only runs the "tar" command; the redirect (>) is >> >>> done by the shell, and since you aren't root, you can't write in >>> /var/lib. >>> > The classic example to illustrate this is: > > $ cat a b> a > > This is supposed to append b to a, but what actually happens is that the > redirection truncates a first, and you wind up with a copy of b in a and > the original contents of a are lost (do not ask how I learned this; the > answer is "the hard way" )-: > > $ cat b>> a > > is the right way to do that. > > In both of these cases, the problem is that the shell does the > redirection first before executing the commands. > > --Greg > > > As I have already answered, let'ts not beat a dead horse. Issue already very well explained by Bill Crawford. No need for any followups. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
