On Wed, Apr 9, 2008 at 1:26 PM, Mark Haney <mhaney@xxxxxxxxxxxxxxxx> wrote: > Does anyone have any ideas on why 'ls' would suddenly stop working? I've got > a FC6 box that acts as a SAN host and for the last week or so I can't ls > anything. It sits and does nothing. Everything else on the box works just > fine except for that. > > I've got no idea how to even go about debugging this. > I have seen this on systems that are using LDAP for authentication. They don't just authenticate at start time, but they look up user information every time. Every single time any command is run, the system goes off to check user identity on a server. When there is network slowdown or server slowdown, then ls is slow. For us, the short term fix was to install the nscd to cache the information so the system does not constantly look on the server. The long term fix was to stop authenticating users with LDAP. pj -- Paul E. Johnson Professor, Political Science 1541 Lilac Lane, Room 504 University of Kansas
