Again, thank you; this is very insightful. problem solved

thanks for your help, this is the repo on dev brach

same error

# URI/cmd/todo_test [codeberg.org/e55am/todo/cmd/todo.test]
cmd/todo/main_test.go:141:12: undefined: expand
ok      URI/todo 0.002s
FAIL    URI/todo/cmd/todo [build failed]
FAIL

thanks, but is there way to address some limitation (e.g. only one came to my mind scroll back.)

It seems an opportunity to ask my stupid questions.

Q1. If I am going to build my minimum linux installation without a GUI, does this require a display manager?

Q2. is there other way to interact with my machine other than tty