NAME
col - filter reverse line feeds from inputSYNOPSIS
col optionsDESCRIPTION
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. It also replaces any whitespace characters with tabs where possible. This can be useful in processing the output of nroff(1) and tbl(1).OPTIONS
-b, --no-backspacesDo not output any backspaces, printing only
the last character written to each column position.
Permit half-forward line feeds. Normally
characters destined for a half-line boundary are printed on the following
line.
Output tabs instead of multiple spaces.
Buffer at least number lines in memory.
By default, 128 lines are buffered.
Force unknown control sequences to be passed
through unchanged. Normally col will filter out any control sequences
other than those recognized and interpreted by itself, which are listed
below.
Output multiple spaces instead of tabs.
Display help text and exit.
Print version and exit.
CONFORMING TO
The col utility conforms to the Single UNIX Specification, Version 2. The -l option is an extension to the standard.NOTES
The control sequences for carriage motion that col understands and their decimal values are listed in the following table:reverse line feed (escape then 7)
half reverse line feed (escape then 8)
half forward line feed (escape then 9)
moves back one column (8); ignored in the
first column
forward line feed (10); also does carriage
return
(13)
shift to normal character set (15)
shift to alternate character set (14)
moves forward one column (32)
moves forward to next tab stop (9)
reverse line feed (11)
HISTORY
A col command appeared in Version 6 AT&T UNIX.SEE ALSO
expand(1), nroff(1), tbl(1)REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.AVAILABILITY
The col command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.2022-05-11 | util-linux 2.38.1 |