Home » Linux Command Reference » UNIX/LINUX Command – col

UNIX/LINUX Command – col

Last updated May 11, 2021

NAME

col—Filter reverse line feeds from input

SYNOPSIS

col [-bfx] [-l num]

DESCRIPTION

col filters out reverse (and half-reverse) line feeds so the output is in the correct order with only forward and half-forward line feeds, and replaces whitespace characters with tabs where possible. This can be useful in processing the output of nroff(1) and tbl(1). col reads from standard input and writes to standard output.

The options are as follows:

-b Do not output any backspaces, printing only the last character written to each column position.
-f Forward half-line feeds are permitted (fine mode). Normally characters printed on a half-line boundary are printed on the following line.
-x Output multiple spaces instead of tabs.
-lnum Buffer at least num lines in memory. By default, 128 lines are buffered.

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