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NAME | SYNOPSIS | DESCRIPTION | OPTIONS | CONFORMING TO | NOTES | HISTORY | SEE ALSO | AVAILABILITY | COLOPHON |
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COL(1) User Commands COL(1)
col - filter reverse line feeds from input
col [options]
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).
col reads from standard input and writes to standard output.
-b, --no-backspaces
Do not output any backspaces, printing only the last
character written to each column position.
-f, --fine
Permit half-forward line feeds. Normally characters
destined for a half-line boundary are printed on the
following line.
-h, --tabs
Output tabs instead of multiple spaces.
-l, --lines number
Buffer at least number lines in memory. By default, 128
lines are buffered.
-p, --pass
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.
-x, --spaces
Output multiple spaces instead of tabs.
-V, --version
Display version information and exit.
-H, --help
Display help text and exit.
The col utility conforms to the Single UNIX Specification,
Version 2. The -l option is an extension to the standard.
The control sequences for carriage motion that col understands
and their decimal values are listed in the following table:
ESC-7 reverse line feed (escape then 7)
ESC-8 half reverse line feed (escape then 8)
ESC-9 half forward line feed (escape then 9)
backspace
moves back one column (8); ignored in the first
column
newline
forward line feed (10); also does carriage return
carriage return
(13)
shift in
shift to normal character set (15)
shift out
shift to alternate character set (14)
space moves forward one column (32)
tab moves forward to next tab stop (9)
vertical tab
reverse line feed (11)
All unrecognized control characters and escape sequences are
discarded.
col keeps track of the character set as characters are read and
makes sure the character set is correct when they are output.
If the input attempts to back up to the last flushed line, col
will display a warning message.
A col command appeared in Version 6 AT&T UNIX.
expand(1), nroff(1), tbl(1)
The col command is part of the util-linux package and is
available from Linux Kernel Archive
⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩.
This page is part of the util-linux (a random collection of Linux
utilities) project. Information about the project can be found
at ⟨https://www.kernel.org/pub/linux/utils/util-linux/⟩. If you
have a bug report for this manual page, send it to
util-linux@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨git://git.kernel.org/pub/scm/utils/util-linux/util-linux.git⟩ on
2020-12-18. (At that time, the date of the most recent commit
that was found in the repository was 2020-12-17.) If you
discover any rendering problems in this HTML version of the page,
or you believe there is a better or more up-to-date source for
the page, or you have corrections or improvements to the
information in this COLOPHON (which is not part of the original
manual page), send a mail to man-pages@man7.org
util-linux July 2014 COL(1)
Pages that refer to this page: colcrt(1), grotty(1)
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