IBM DB2 installation

Locate DB2 products installed on your system

db2ls

switch ownership of an instance from one DB2 copy to another

db2iupdt

/etc/sysctl.conf

kernel.sem=250 256000 32 1024
#Example shmmax for a 64-bit system
kernel.shmmax=1073741824	
#Example shmall for 90 percent of 16 GB memory
kernel.shmall=3774873		
kernel.msgmax=65535
kernel.msgmnb=65535
kernel.msgmni=2048

To reload sysctl.conf parameters run

sysctl -p

For a partitioned database modify /etc/services and add the followings. One could choose a different range if necessary (but the same consecutive ports should be defined on all servers participating).

    DB2_db2inst1         60000/tcp
    DB2_db2inst1_1       60001/tcp
    DB2_db2inst1_2       60002/tcp
    DB2_db2inst1_END     60003/tcp