I have installed DB2 Express-C 10.5 on my Debian 7 system, with this command:
./db2_install -f sysreq
The -f option was necessary because DB2 failed to get info about my system.
But now I cannot start my fresh DB2 installation:
root@this:/opt/ibm/db2/V10.5/adm# ./db2start SQL10007N Message "-1390" could not be retrieved. Reason code: "3".