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COL(1)                    BSD General Commands Manual                   COL(1)

     col - filter reverse line feeds from input

     col [-bfpx] [-l num]

     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, and replaces white-space charac-
     ters 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.

     The options are as follows:

     -b     Do not output any backspaces, printing only the last character written to each
            column position.

     -f     Forward half line feeds are permitted (''fine'' mode).  Normally characters
            printed on a half line boundary are printed on the following line.

     -p     Force unknown control sequences to be passed through unchanged.  Normally, col
            will filter out any control sequences from the input other than those recog-
            nized and interpreted by itself, which are listed below.

     -x     Output multiple spaces instead of tabs.

     -lnum  Buffer at least num lines in memory.  By default, 128 lines are buffered.

     The control sequences for carriage motion that col understands and their decimal val-
     ues 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
     carriage return  (13)
     newline          forward line feed (10); also does carriage return
     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 char-
     acter set is correct when they are output.

     If the input attempts to back up to the last flushed line, col will display a warning

     expand(1), nroff(1), tbl(1)

     The col utility conforms to the Single UNIX Specification, Version 2. The -l option
     is an extension to the standard.

     A col command appeared in Version 6 AT&T UNIX.

     The col command is part of the util-linux-ng package and is available from

BSD                              June 17, 1991                             BSD

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