The ls option to list entries by lines instead of by columns is -1 (the
digit one). Using ls -1 will output one entry per line, listing files
vertically rather than in multiple columns. This option is specifically
designed to list filenames only, one per line, without additional details
unless combined with other options
. For example:
ls -1
will produce output like:
file1.txt
file2.txt
directory1
file3.txt
This differs from the default behavior of ls which tries to fit entries into
multiple columns when outputting to a terminal. The -1 option forces a
single column listing regardless of output target
. In summary, the key option is:
-1: list one entry per line (single-column format)
