Although it is 12.1, here is the syntax I used on my most recent successful CE db2icrt:
[root ~]# date ; /opt/ibm/db2/V12.1/instance/db2icrt -p 50000 -u db2fenc1 db2inst1 ; date
Thu Apr 17 08:18:23 PM UTC 2025
DBI1446I The db2icrt command is running.
DB2 installation is being initialized.
Total number of tasks to be performed: 4
Total estimated time for all tasks to be performed: 309 second(s)
Task #1 start
Description: Setting default global profile registry variables
Estimated time 1 second(s)
Task #1 end
Task #2 start
Description: Initializing instance list
Estimated time 5 second(s)
Task #2 end
Task #3 start
Description: Configuring DB2 instances
Estimated time 300 second(s)
Task #3 end
Task #4 start
Description: Updating global profile registry
Estimated time 3 second(s)
Task #4 end
The execution completed successfully.
For more information see the DB2 installation log at "/tmp/db2icrt.log.1560".
DBI1070I Program db2icrt completed successfully.
Thu Apr 17 08:18:48 PM UTC 2025
[root ~]#
EDIT: I should have added this earlier:
db2licm -l
Product name: "DB2 Community Edition"
License type: "Community"
Expiry date: "Permanent"
Product identifier: "db2dec"
Version information: "12.1"
Max amount of memory (GB): "8"
Max number of cores: "4"
Enforcement policy: "Hard Stop"
Features:
IBM DB2 Performance Management Offering: "Not licensed"