db2_kill

db2_kill runs on Unix to kill DB2 instance immediately. Thus it simulates DB2 failure.

If you got SQL1072C message when db2start not work after db2_kill, probably you have a db2bp command line database connection not terminated before db2_kill.

Try db2terminate, or just run ps -ef | grep and then kill -9 processes related to this instance.

It works for me.