look(1) -- Linux man page
NAMElook - display lines beginning with a given string
SYNOPSISlook [-dfa ] [-t termchar ] string [file ]
DESCRIPTIONThe 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) 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.
- Dictionary character set and order, i.e. only alphanumeric characters are compared.
- Ignore the case of alphabetic characters.
- Use the alternate dictionary /usr/share/dict/web2
- Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of termchar are compared.
- the dictionary
- the alternate dictionary
SEE ALSOgrep(1), sort(1)
COMPATIBILITYThe original manual page stated that tabs and blank characters participated in comparisons when the -d option was specified. This was incorrect and the current man page matches the historic implementation.
HISTORYLook appeared in Version 7 AT&T Unix.