print lines matching a pattern
-v, --invert-match
       Invert the sense of matching, to select non-matching lines.  (-v is specified by POSIX.)
-f FILE, --file=FILE
       Obtain patterns from FILE, one per line.  The empty file contains  zero  patterns,  and  therefore
       matches nothing.  (-f is specified by POSIX.)
source manpages: rgrep