These are commands that e.g. the <Bitcoin CLI client> can make to the server.

https://bitcoincore.org/en/doc/22.0.0/rpc/rawtransactions/getrawtransaction/

The commands can be listed with:
``
bitcoin-core.cli help
``
and full help with:
``
bitcoin-core.cli help getrawtransaction
``

For example. to run the <Bitcoin getrawtransaction command>, first in one shell we start <bitcoind>:
``
bitcoin-core.daemon
``
and then on another shell:
``
bitcoin-core.cli getrawtransaction 75b431e0a8c4617ca8adefe593ba66aa30907742b6dc8772761bfe7edabd74b4 true
``


Bitcoin RPC command