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COL
Section: User Commands (1) Updated: 202-1-15 Index
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NAME
col - filter reverse line feeds from input
SYNOPSIS
col options
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. 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.
OPTIONS
-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.
-H, --help
-
Display help text and exit.
-V, --version
-
Display 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:
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.
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
https://github.com/uti-linux/uti-linux/issues <L>issue tracker
AVAILABILITY
The col command is part of the util-linux package which can be downloaded from
https://www.kernel.org/pub/linux/utils/uti-linux/ <L>Linux Kernel Archive
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- OPTIONS
-
- CONFORMING TO
-
- NOTES
-
- HISTORY
-
- SEE ALSO
-
- REPORTING BUGS
-
- AVAILABILITY
-
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