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look(1) [centos man page]

LOOK(1) 							   User Commands							   LOOK(1)

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 util-linux June 2011 LOOK(1)

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COL(1)								   User Commands							    COL(1)

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 < linux/>. util-linux September 2011 COL(1)
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