Failed run a user's alias inside bash CLI
How can run a user's alias



but as to do it in a CLI


Please show the correct fixing way

Start an interactive shell
$ bash -ic 'grab man'
This info is available in the man page, see man 1 bash.

grab? command not found is what I'd expect.

Presumbaly the OP has alias named "grab" that resolves to some existing command.

Presumbaly the OP has alias named "grab" that resolves to some existing command.

Very likely, but if he needs help, he should provide all relevant information, we shouldn't have to ask for it as he's asked questions previously.