David Hopkins wrote:
 > I have searched unsuccessfully for an answer on exactly what services
 > need to be restarted to allow clients to boot.  Note that my
 > authentication server is not the same system as the LTSP server and
 > that the authentication is using ldap.
A wild guess: You use LDAP for hostname resolution?

Your NFS-symptoms remind me of our complete DNS breakdown two months
ago (I use LDAP for user authentication but DNS for hostnames).

So I would guess that after restarting the authentication server
(i.e. LDAP) the NFS server has problems in resolving the NFS client's
hostname, causing the "permission denied".

If I guessed right up to this point a possible reason for this lost
LDAP connection could be the nscd. So a restart of the nscd may help.
It keeps a permanent TCP connection to the LDAP server and I sometimes
noticed problems in reconnecting after an LDAP restart.

Horst

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