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35 .\" @(#)col.1 6.8 (Berkeley) 6/17/91
37 .TH COL "1" "July 2014" "util-linux" "User Commands"
39 col \- filter reverse line feeds from input
45 filters out reverse (and half-reverse) line feeds so the output is in the
46 correct order, with only forward and half-forward line feeds. It also replaces
47 any whitespace characters with tabs where possible. This can be useful in
48 processing the output of
54 reads from standard input and writes to standard output.
57 \fB\-b\fR, \fB\-\-no\-backspaces\fR
58 Do not output any backspaces, printing only the last character written to
61 \fB\-f\fR, \fB\-\-fine\fR
62 Permit half-forward line feeds.
63 Normally characters destined for a half-line boundary are printed on the
66 \fB\-h\fR, \fB\-\-tabs\fR
67 Output tabs instead of multiple spaces.
69 \fB\-l\fR, \fB\-\-lines\fR \fInumber\fR
72 lines in memory. By default, 128 lines are buffered.
74 \fB\-p\fR, \fB\-\-pass\fR
75 Force unknown control sequences to be passed through unchanged. Normally
77 will filter out any control sequences other than those
78 recognized and interpreted by itself, which are listed below.
80 \fB\-x\fR, \fB\-\-spaces\fR
81 Output multiple spaces instead of tabs.
83 \fB\-V\fR, \fB\-\-version\fR
84 Display version information and exit.
86 \fB\-H\fR, \fB\-\-help\fR
87 Display help text and exit.
89 The control sequences for carriage motion that
91 understands and their decimal values are listed in the following table:
97 reverse line feed (escape then 7)
100 half reverse line feed (escape then 8)
103 half forward line feed (escape then 9)
106 moves back one column (8); ignored in the first column
109 forward line feed (10); also does carriage return
115 shift to normal character set (15)
118 shift to alternate character set (14)
121 moves forward one column (32)
124 moves forward to next tab stop (9)
127 reverse line feed (11)
131 All unrecognized control characters and escape sequences are discarded.
134 keeps track of the character set as characters are read and makes sure the
135 character set is correct when they are output.
137 If the input attempts to back up to the last flushed line,
139 will display a warning message.
147 utility conforms to the Single UNIX Specification, Version 2. The
149 option is an extension to the standard.
153 command appeared in Version 6 AT&T UNIX.
155 The col command is part of the util-linux package and is available from
156 .UR https://\:www.kernel.org\:/pub\:/linux\:/utils\:/util-linux/