Add Count The Number Of Matches In A Grep as a unix til

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://tinyletter.com/jbranchaud).
 
-_1127 TILs and counting..._
+_1128 TILs and counting..._
 
 ---
 
@@ -1047,6 +1047,7 @@ _1127 TILs and counting..._
 - [Configure cd To Behave Like pushd In Zsh](unix/configure-cd-to-behave-like-pushd-in-zsh.md)
 - [Copying File Contents To System Paste Buffer](unix/copying-file-contents-to-system-paste-buffer.md)
 - [Copying Nested Directories With Ditto](unix/copying-nested-directories-with-ditto.md)
+- [Count The Number Of Matches In A Grep](unix/count-the-number-of-matches-in-a-grep.md)
 - [Create A File Descriptor with Process Substitution](unix/create-a-file-descriptor-with-process-substitution.md)
 - [Curl With Cookies](unix/curl-with-cookies.md)
 - [Curling For Headers](unix/curling-for-headers.md)

unix/count-the-number-of-matches-in-a-grep.md

@@ -0,0 +1,29 @@
+# Count The Number Of Matches In A Grep
+
+My go to way of counting the number of matches in a `grep` of a file is to pipe
+it to another command — `wc`.
+
+Here is what that looks like with the README for [this
+repo](https://github.com/jbranchaud/til). This counts the number of lines that
+start with `###`.
+
+```bash
+$ grep '^###' README.md | wc -l
+      48
+```
+
+When `wc` is used with the `-l` flag, it gives a count of the number of lines.
+In this case the number of `grep` matches that get piped to it.
+
+There is another way to do this solely with the `grep` command — using the `-c`
+flag.
+
+```bash
+$ grep -c '^###' README.md
+48
+```
+
+When you include the `-c` (or `--count`) flag with `grep`, instead of the
+matches being output, the count of the matches is output.
+
+See `man grep` for more details.