Command:   cgrep - grep and display context
Syntax:    cgrep [-a n] [-b n] [-f] [-l n]  [-n] [-w n]  pattern  [file]
                ...
Flags:     -a  How many lines to display after the matching line
           -b  How many lines to display before the matching line
           -f  Suppress file name in the output
           -l  Lines are truncated to this length before comparison
           -n  Suppress line numbers in the output
           -w  Sets window size (same as -a n -b n)
Example:   cgrep -w 3 hello file1   # Print 3 lines of context each way

     Cgrep is a program like grep, except that it also can print  a  few
lines  above  and/or  below the matching lines.  It also prints the line
numbers of the output.