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LOOK(1) 	       DragonFly General Commands Manual	       LOOK(1)

NAME

look -- display lines beginning with a given string

SYNOPSIS

look [-df] [-t termchar] string [file ...]

DESCRIPTION

The look utility displays any lines in file which contain string as a prefix. As look performs a binary search, the lines in file must be sorted. If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic charac- ters is ignored. The following options are available: -d, --alphanum Dictionary character set and order, i.e., only alphanumeric char- acters are compared. -f, --ignore-case Ignore the case of alphabetic characters. -t, --terminate termchar Specify a string termination character, i.e., only the characters in string up to and including the first occurrence of termchar are compared.

ENVIRONMENT

The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of the look utility. Their effect is described in environ(7).

FILES

/usr/share/dict/words the dictionary

EXIT STATUS

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.

COMPATIBILITY

The original manual page stated that tabs and blank characters partici- pated in comparisons when the -d option was specified. This was incor- rect and the current man page matches the historic implementation. The -a and --alternative flags are ignored for compatibility.

SEE ALSO

grep(1), sort(1)

HISTORY

A look utility appeared in Version 7 AT&T UNIX.

BUGS

Lines are not compared according to the current locale's collating order. Input files must be sorted with LC_COLLATE set to `C'. DragonFly 4.9 January 12, 2016 DragonFly 4.9

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