look(1) [centos man page]

LOOK(1) 							   User Commands							   LOOK(1)

NAME

       look - display lines beginning with a given string

SYNOPSIS

       look [options] string [file]

DESCRIPTION

       The  look  utility  displays  any  lines  in file which contain string.	As look performs a binary search, the lines in file must be sorted
       (where sort(1) got the same options -d and/or -f that look is invoked with).

       If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared  and  the  case  of	alphabetic
       characters is ignored.

OPTIONS

       -a, --alternative
	      Use the alternative dictionary file.

       -d, --alphanum
	      Use normal dictionary character set and order, i.e. only alphanumeric characters are compared.  (This is on by default if no file is
	      specified.)

       -f, --ignore-case
	      Ignore the case of alphabetic characters.  (This is on by default if no file is specified.)

       -t, --terminate character
	      Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of character are
	      compared.

       -h, --help
	      Display help text and exit.

       -V, --version
	      Output version information and exit.

       The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.

EXAMPLE

	      sort -d /etc/passwd -o /tmp/look.dict
	      look -t: root:foobar /tmp/look.dict

FILES

       /usr/share/dict/words
	   the dictionary

       /usr/share/dict/web2
	   the alternative dictionary

SEE ALSO

       grep(1), sort(1)

COMPATIBILITY

       The  original  manual  page stated that tabs and blank characters participated in comparisons when the alphanum option was specified.  This
       was incorrect, and the current man page matches the historic implementation.

HISTORY

       The look utility appeared in Version 7 AT&T Unix.

AVAILABILITY

       The look command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.

util-linux							     June 2011								   LOOK(1)

COL(1)								   User Commands							    COL(1)

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,
       and replaces white-space 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
	      Forward half line feeds are permitted fine mode.	Normally characters printed on a half-line boundary are printed on  the  following
	      line.

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

       -h, --tabs
	      Output tabs instead of multiple spaces.

       -x, --spaces
	      Output multiple spaces instead of tabs.

       -l, --lines number
	      Buffer at least number lines in memory.  By default, 128 lines are buffered.

       -V, --version
	      Output version information and exit.

       -H, --help
	      Output help and exit.

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.

SEE ALSO

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

STANDARDS

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

HISTORY

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

AVAILABILITY

       The col command is part of the util-linux package and is available from Linux  Kernel  Archive  <ftp://ftp.kernel.org/pub/linux/utils/util-
       linux/>.

util-linux							  September 2011							    COL(1)