grep(1)                    (Essential Utilities)                    grep(1)


   NAME
         grep - search a file for a pattern

   SYNOPSIS
         grep [options] limited regular expression [file ...]

   DESCRIPTION
         grep searches files for a pattern and prints all lines that contain
         that pattern.  grep uses limited regular expressions (expressions
         that have string values that use a subset of the possible
         alphanumeric and special characters) like those used with ed(1) to
         match the patterns.  It uses a compact non-deterministic algorithm.

         Be careful using the characters $, *, [, ^, |, (, ), and \ in the
         limited regular expression because they are also meaningful to the
         shell.  It is safest to enclose the entire limited regular expression
         in single quotes '...'.

         If no files are specified, grep assumes standard input.  Normally,
         each line found is copied to standard output.  The file name is
         printed before each line found if there is more than one input file.

         Command line options are:

         -b    Precede each line by the block number on which it was found.
               This can be useful in locating block numbers by context (first
               block is 0).
         -c    Print only a count of the lines that contain the pattern.
         -i    Ignore upper/lower case distinction during comparisons.
         -h    Prevents the name of the file containing the matching line from
               being appended to that line.  Used when searching multiple
               files.
         -l    Print the names of files with matching lines once, separated by
               new-lines.  Does not repeat the names of files when the pattern
               is found more than once.
         -n    Precede each line by its line number in the file (first line is
               1).
         -s    Suppress error messages about nonexistent or unreadable files
         -v    Print all lines except those that contain the pattern.

   SEE ALSO
         ed(1), egrep(1), fgrep(1), sed(1), sh(1).

   DIAGNOSTICS
         Exit status is 0 if any matches are found, 1 if none, 2 for syntax
         errors or inaccessible files (even if matches were found).

   BUGS
         Lines are limited to BUFSIZ characters; longer lines are truncated.
         BUFSIZ is defined in /usr/include/stdio.h.
         If there is a line with embedded nulls, grep will only match up to


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   grep(1)                    (Essential Utilities)                    grep(1)


         the first null; if it matches, it will print the entire line.




















































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