Solution : https://service.sap.com/sap/support/notes/418827 (SAP Service marketplace login required)
Key words :
/tmp/db2/unix/aix/dbsw/db2/ db2_06_01, longer supported onaix 5l v5, located inthe directory /usr/sbin, 1 additional key words db2setup rootpre, runinstallerthe shell script rootpre, sh--------------------------- kernel extension version, kernel extensionsare loaded correctly, /usr/sbin/installp /, kernel extenisonis loaded, older patch levels