Add Run A cURL Command Without The Progress Meter as a Unix TIL

Author: jbranchaud

README.md

@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1320 TILs and counting..._
+_1321 TILs and counting..._
 
 ---
 
@@ -1316,6 +1316,7 @@ _1320 TILs and counting..._
 - [Repeat Yourself](unix/repeat-yourself.md)
 - [Replace Pattern Across Many Files In A Project](unix/replace-pattern-across-many-files-in-a-project.md)
 - [Run A Command Repeatedly Several Times](unix/run-a-command-repeatedly-several-times.md)
+- [Run A cURL Command Without The Progress Meter](unix/run-a-curl-command-without-the-progress-meter.md)
 - [Safely Edit The Sudoers File With Vim](unix/safely-edit-the-sudoers-file-with-vim.md)
 - [Saying Yes](unix/saying-yes.md)
 - [Search Files Specific To A Language](unix/search-files-specific-to-a-language.md)

unix/run-a-curl-command-without-the-progress-meter.md

@@ -0,0 +1,30 @@
+# Run A cURL Command Without The Progress Meter
+
+By default when you run a `curl` command that will output to the terminal, it
+disables the progress meter for the request. When the response output is
+redirected or piped somewhere else however, the progress meter will be
+displayed in the terminal.
+
+```bash
+$ curl -H "Content-Type: application/json" -G http://myurl.com | jq
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+100  2515    0  2515    0     0   4184      0 --:--:-- --:--:-- --:--:--  4184
+```
+
+This can be disabled with the `-s` flag (which is short for `--silent`).
+
+```bash
+$ curl -s -H "Content-Type: application/json" -G http://myurl.com | jq
+```
+
+However, the `-s` flag will also suppress error messages. This is a bit
+unhelpful. You can then add in the `-S` flag (short for `--show-error`) to
+ensure that error messages are shown even while the progress meter is
+suppressed.
+
+```bash
+$ curl -sS -H "Content-Type: application/json" -G http://myurl.com | jq
+```
+
+See `man curl` for more details.