mysql backend mysql.sock ubuntu

[ict <ict@wildernesse.kent.sch.uk>]

hi,

i am trying to setup a slapd server, i have it running fine using the  
default bdb database,
how ever i would like to use the mysql backend so that queries can be run  
on the database and
the usernames and passwords can be used with other systems.

after setting up everything and starting the server i get an error saying  
that mysql.sock can not
be used, i have seached the system and this file does not appear to exist  
on ubuntu.

has anyone got this working with ubuntu, or have any idea why mysql.sock  
is missing or how to add it
back or anything that could be of use ???

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