Question

$ grep/ sbin/nologin$/etc/passwd| cut -d “:”-f1| short| less

explan the output

Answer 1

if we part apart from the syntax, so first we display all the lines which contain nologin word inside passwd file.

Now we separate the first column only using the cut command with delimiter : colon with column f1

now sort this data using sort command from ascending order

and at last less command is for display only till terminal shows and remaining lines will be shown by pressing enter

Thanks