




Command:   grep - search a file for lines containing a given pattern
Syntax:    grep [-elnsv] pattern [file] ...
Flags:     -e  -e pattern is the same as pattern
           -c  Print a count of lines matched
           -i  Ignore case
           -l  Print file names, no lines
           -n  Print line numbers
           -s  Status only, no printed output
           -v  Select lines that do not match
Examples:  grep mouse file          #  Find  lines  in  file  containing
                                      mouse
           grep [0-9] file          # Print lines containing a digit

     Grep searches one or more files (by default, stdin) and selects out
all  the  lines  that  match  the  pattern.  All the regular expressions
accepted by ed and mined are  allowed.   In  addition,  +  can  be  used
instead of * to mean 1 or more occurrences, ? can be used to mean 0 or 1
occurrences, and | can be used between two regular expressions  to  mean
either  one  of them.  Parentheses can be used for grouping.  If a match
is found, exit status 0 is returned.  If no match is found, exit  status
1 is returned.  If an error is detected, exit status 2 is returned.





































                                                                        

