crop - crop input lines to a maximum width
crop [−w width] [file ...]
Crop copies its input to its output, truncating each line that exceeds a maximum width. Lines shorter than that width are left unchanged; see also pad(1).
The options are as follows:
If no width is explicitly specified, and the standard error is connected to a terminal, then crop tries to determine its width, first by querying the terminal driver, and failing that by examining the COLUMNS environment variable. If neither method succeeds, or if the standard error is not a terminal, then width defaults to 80 columns.
Crop does not yet understand backspace and tab, or multibyte characters.
pad(1), tty(4)