On Fri, 2007-08-03 at 14:43 -0400, Tony Nelson wrote: > At 11:31 AM -0700 8/3/07, Les wrote: > >On Fri, 2007-08-03 at 15:41 +0100, Timothy Murphy wrote: > >> Aaron Konstam wrote: > >> > >> >> Use the --exclude=[package] option like > >> >> # yum update --exclude=kernel* > >> > >> > The above will not work since the * will be expanded by the shell not > >> > yum. > >> > >> Are you sure? > >> My impression is that it is only expanded if you happen to have > >> a file called kernel* in the current directory. > >> If it doesn't find anything yum does expand the argument, I think? > >> > >> However, I always say: yum update --exclude=kernel\* > >> > >In most expansion cases, the backslash is the escape character, so your > >commands are the same, I think. > > No, the backslash is the escape character, so "kernel*" acts differently > than "kernel\*". The former will be expanded by the shell if it can, and > left alone otherwise. The latter will be left alone by the shell. When > yum gets the command, if it finds a name with "*" in it, it will expand it > appropriately, in this case as the name of a package. If the shell already > managed to expand the name, the resulting exclude won't match any package > and won't work. We have some confusion here. --exclude=kernel\* and --exclude="kernel*" are the same. Both keep the shell from expanding the * -- ======================================================================= "There is nothing so deadly as not to hold up to people the opportunity to do great and wonderful things, if we wish to stimulate them in an active way." - Dr. Harold Urey, Nobel Laureate in chemistry ======================================================================= Aaron Konstam telephone: (210) 656-0355 e-mail: akonstam@xxxxxxxxxxxxx
