/usr/bin/berkeley_db43_svc
/usr/bin/db43_archive
/usr/bin/db43_checkpoint
/usr/bin/db43_deadlock
/usr/bin/db43_dump
/usr/bin/db43_load
/usr/bin/db43_printlog
/usr/bin/db43_recover
/usr/bin/db43_stat
/usr/bin/db43_upgrade
/usr/bin/db43_verify
You may install this package on CentOS with
yum
install compat-db43