line - read a line of text
line
The line(1) utility reads one line of text from standard input and writes it to standard output. It reads up to and including a newline; and always writes at least a newline.
Historically, line(1) is used in shell scripts to read from the user's terminal; the read(1) command is preferred.
The line(1) command exits with status 0 on success and >0 if end-of-file is found.
read(1)