COL - Online Linux Manual PageSection : 1
Updated : 2022-05-11
Source : util−linux 2.38.1
Note : User Commands
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NAMEcol − filter reverse line feeds from input
SYNOPSIScol options
DESCRIPTIONcol 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 Print version and exit.
CONFORMING TOThe col utility conforms to the Single UNIX Specification, Version 2. The −l option is an extension to the standard.
NOTESThe 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.
HISTORYA col command appeared in Version 6 AT&T UNIX.
SEE ALSOexpand(1), nroff(1), tbl(1)
REPORTING BUGSFor bug reports, use the issue tracker at <https://github.com/util−linux/util−linux/issues>.
AVAILABILITYThe 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/>. 0
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Online Linux Manual Page : Version : Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
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