Integrating an AIX system in to Active Directory is not entirely straight forward.  Integration in to an Active Directory domain for user authentication can be done utilizing the following steps (similar to that found in http://us1.samba.org/samba/ftp/Binary_Packages/AIX/README):

Download and install the krb5.client.rte package for AIX.
Download the pre-built AIX 5.2 (compatible with AIX 5.3) binaries from the SAMBA [...]

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I found out the hard way that the monitoring tool Cacti does not really support rrdtool 1.3.2. Fortunately, there is an easy workaround.
Edit cacti/lib/rrd.php and comment out line 1685:
// return “–font ” . strtoupper($type) . “:” . $size . “:” . $font . RRD_NL;

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