I always foget how to do that so here is the tiny tutorial.
Step 1
create a conversion converted_schema.conf file containing the following line(s):
include /etc/ldap/schema/[shema_0].schema
include /etc/ldap/schema/[shema_1].schema
...
Step 2
Convert the schema using:
$ mkdir /tmp/ldif_output
$ slaptest -f converted_schema.conf -F /tmp/ldif_output
Tweak the converted_schema.conf if conversion did not succeed.
Step 3
Edit the /tmp/ldif_output/cn=config/cn=schema/cn={X}[shema_X].ldif file:
- Update the first line to:
dn: cn={X}[shema_X],cn=schema,cn=config - Update:
cn: {X}[shema_X] - Remove last 7 lines beginning with:
structuralObjectClass
Step 4
Add the schema:
$ ldapadd -x -D cn=config -f /tmp/ldif_output/cn\=config/cn\=schema/cn\=\{X\}[shema_X].ldif
Or delete it:
$ ldapadd -x -D cn=config -f /tmp/ldif_output/cn\=config/cn\=schema/cn\=\{X\}[shema_X].ldif
Note: The X has to be next in the row in /etc/openldap/slapd.d/cn\=config/cn\=schema and shema_X is an arbitrary name of the new schema.