NAME
look - display lines beginning with a given stringSYNOPSIS
look [options] 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 (where sort(1) was given the same options -d and/or -f that look is invoked with).OPTIONS
-a, --alternativeUse the alternative dictionary file.
Use normal dictionary character set and order,
i.e., only blanks and alphanumeric characters are compared. This is on by
default if no file is specified.
Note that blanks have been added to dictionary character set for compatibility
with sort -d command since version 2.28.
Ignore the case of alphabetic characters. This
is on by default if no file is specified.
Specify a string termination character, i.e.,
only the characters in string up to and including the first occurrence
of character are compared.
Display help text and exit.
Print version and exit.
ENVIRONMENT
WORDLISTPath to a dictionary file. The environment
variable has greater priority than the dictionary path defined in the
FILES segment.
FILES
/usr/share/dict/wordsthe dictionary
the alternative dictionary
HISTORY
The look utility appeared in Version 7 AT&T Unix.EXAMPLES
sort -d /etc/passwd -o /tmp/look.dict look -t: root:foobar /tmp/look.dict
SEE ALSO
grep(1), sort(1)REPORTING BUGS
For bug reports, use the issue tracker at <https://github.com/util-linux/util-linux/issues>.AVAILABILITY
The look command is part of the util-linux package which can be downloaded from Linux Kernel Archive <https://www.kernel.org/pub/linux/utils/util-linux/>.2022-05-11 | util-linux 2.38.1 |