Merge pull request #330 from NASA-Openscapes/wget-curl

Add wget and curl to How Tos

how-tos/access-data/access-data-command-line.md

@@ -0,0 +1,40 @@
+---
+title: How do I access data stored in Earthdata Cloud with cURL and Wget?
+---
+
+[How To Access Data With cURL And Wget](https://urs.earthdata.nasa.gov/documentation/for_users/data_access/curl_and_wget) provides an step-by-step instruction on how to bulk download data from NASA EOSDIS DAACs using [wget](https://www.gnu.org/software/wget/) and  [cURL](https://curl.se/) from the command line. 
+
+This section provides additional recommendations relevant to bulk downloading data using wget/cURL. The existing documentation will be updated with these additional notes in future. 
+- You need to [install wget](https://ftp.gnu.org/gnu/wget/) or [install cURL](https://curl.se/download.html) before diving into this documentation. 
+  - View [installing curl instructions](https://developer.zendesk.com/documentation/api-basics/getting-started/installing-and-using-curl/#installing-curl) and [Frequently Asked Questions About Downloading GNU Wget](http://wget.addictivecode.org/FrequentlyAskedQuestions.html#download) for more details.
+- You also need to save download link(s) for your data as a text file using [Nasa Earthdata Search](https://search.earthdata.nasa.gov/search) or [Common Metadata Repository (CMR)](https://www.earthdata.nasa.gov/eosdis/science-system-description/eosdis-components/cmr) API.
+- Navigate to the directory you want to save the data using `cd Insert_Your_Directory`.
+- To bulk download multiple files using cURL try:
+    ```text
+    xargs -n 1 curl -O -b ~/.urs_cookies -c ~/.urs_cookies -L -n < Insert_Text_File
+    ```
+- If you experience authentication issues working with wget, try creating .wgetrc file  in your home directory/user profile as suggested in [Troubleshooting wget](https://urs.earthdata.nasa.gov/documentation/for_users/data_access/troubleshooting_wget).
+  
+  To Create a .wgetrc file in the command line, enter the following in Terminal.  
+  - Windows  
+    ```text
+    NUL >> .wgetrc  
+    ```
+  - MacOS or Linux  
+    ```text
+    touch .wgetrc | chmod og-rw .wgetrc
+    ```
+  To insert your NASA Earthdata Login username and password into the file, enter the following in the Command Prompt and replace your username and password.  
+  
+  ```text
+  echo http-user=Insert_Your_Username >> .wgetrc | echo http-password=Insert_Your_Password >> .wgetrc
+  ```
+  After creating .wgetrc file in your home directory/user profile, for downloading a single file try:
+  ```text
+    wget Insert_the_Download_Link
+    ``` 
+  For downloading multiple files try:
+   ```text
+    wget -i Insert_Text_File
+    ``` 
+