Add second shortname to OD Users

Micah Baker, the other day asked me about adding a secondary shortname to OD users.

So how do you add a secondary short name? We could use WorkGroup Manger, but I like the command line and automation.
So I use dscl the command line directory services utility. See the dscl man page here

dscl -u (OD-DIR-ADMIN) -P (PASSWORD) /LDAPv3/(ODMASTER-DN) -append Users/(SHORTNAME) uid (SHORTNAME TO ADD)

Micah had first_last as the username, and wanted to add first.last to all his users.
So through a script together.

#!/bin/bash -
# Eden Nelson 3/12/08
# add shortname

#Please set these vars!!!
# OD Master DNS
ODMASTER=
# OD Dir Admin
ODADMIN=
# OD Dir Admin Pass
ODPASS=
#Temp file where usernames are kept
TEMPFILE=/tmp/default.tmp
#Sleep between operations, keep the script from hammering the ODM
SLEEP=3

## ##
# Script Starts Here #
## ##

trap "{ rm -f $TEMPFILE ;}" EXIT SIGINT SIGTERM

dscl /LDAPv3/"$ODMASTER" -list Users > "$TEMPFILE"

cat "$TEMPFILE" | \
while read USERNAME
do

FIRSTNAME=`echo $USERNAME | cut -d'_' -f 1`
LASTNAME=`echo $USERNAME | cut -d'_' -f 2`

dscl -u "$ODADMIN" -P "$ODPASS" /LDAPv3/"$ODMASTER" -append Users/"$USERNAME" uid "$FIRSTNAME"."$LASTNAME"

sleep "$SLEEP"

done

exit 0