Merge pull request #763 from Songjoy/master

docs: improve docs

FAQ.md

@@ -240,10 +240,10 @@ Yes, Dragonfly supports users to pull private image which needs username/passwor
 }
 ```
 
-In the above content the `auth_value` base64("${usename}:${password}"). Since users definitely have their own username/password for private images, then use the following command to generate `$auth_value` and fill the generated result in `config.json`:
+In the above content the `auth_value` base64("${username}:${password}"). Since users definitely have their own username/password for private images, then use the following command to generate `$auth_value` and fill the generated result in `config.json`:
 
 ```shell
-echo "${usename}:${password}" | base64
+echo "${username}:${password}" | base64
 ```
 
 ## How to check if block piece is distributed among dfgets nodes

docs/user_guide/download_files.md

@@ -31,7 +31,7 @@ Things are done differently when you download container images and download gene
     tailf ~/.small-dragonfly/logs/dfdaemon.log
     ```
 
-    **Tip:** To list all available parameters for dfdaemon, run `dfdeaemon -h`.
+    **Tip:** To list all available parameters for dfdaemon, run `dfdaemon -h`.
 
 3. Configure the Daemon Mirror.
 
@@ -67,10 +67,10 @@ Things are done differently when you download container images and download gene
     }
     ```
 
-    The ${auth_value} is `base64("${usename}:${password}")`.
+    The ${auth_value} is `base64("${username}:${password}")`.
 
     ```bash
-    echo "${usename}:${password}" | base64
+    echo "${username}:${password}" | base64
     ```
 
 4. Download an image with Dragonfly.