I would like to move my Windows Db2 databases to Linux-based environment. I found that in general Db2 does not support moving from Windows => Linux e.g. by just using "backup" & "restore". Also it seems like the Connections database transfer tool (dbt) that HCL offered in the past does not exist anymore. I am aware of functions like "db2move" but I am not sure if this can be used to actually achieve this goal because I did not use it before.
How can this be achieved ? Any whitepapers available ?
I confirm this path, we did the same (db2look and db2move) last year using a different blogpost which is no longer available. It's a lot of manual work but it works well. You may struggle with integrity of some tables and you may need to modify some data in SYSCAT schema and execute runstat multiple times.
As Wannes said, you can still use the dbt tool and this is really your only way to go. If you also have Forms Experience Builder / Community Surveys in your current environment, check out this post as there's no script included to migrate the FEBDB in the database transfer tool:
*At the end I made the decision to migrate all databases the same way which is using "db2move". I did not run db2look: I just created empty databases with the "createDb.sql"-scripts offered by the installer, afterwards dropped the "main"-schema of a databases e.g. "BLOGS" for database "BLOGS" and then run "db2move COPY" for this schema. If you add the source-db to the db2-catalog of the new db2instance it is also possible to migrate data without any export/import and just pull it remotely.
This went pretty well. I can not find any errors in the logs and also all data is accessible. This was easier than expected.