|-----------------|-------------|
| `grep [options] day haiku.txt` | finds every instance of the string `day` in the file haiku.txt and pipes it to standard output |
-| grep options | |
-|--------------|--|
+| grep options | |
+|--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| `-E` | tells grep you will be using a regular expression. Enclose the regular expression in quotes. _Note:_ the power of `grep` comes from using regular expressions. Please see the regular expressions sheet for examples |
| `-i` | makes matching case-insensitive |
| `-n` | limits the number of lines that match to the first n matches |
| `-v` | shows lines that do not match the pattern (inverts the match) |
-| `-w` | outputs instances where the pattern is a whole word |
+| `-w` | outputs instances where the pattern is a whole word |
### b) How to find files with certain properties...
* **`find . -type d` -->