В AIX вы можете попробовать:
db2level
Пример вывода:
db2level
DB21085I This instance or install (instance name, where applicable:
"db2inst1") uses "64" bits and DB2 code release "SQL09077" with level
identifier "08080107".
Informational tokens are "DB2 v9.7.0.7", "s121002", "IP23367", and Fix Pack
"7".
Product is installed at "/db2_09_07".