[incubator-iotdb] branch fix_doc_error updated: Update Frequently asked questions.md

[dope]

This is an automated email from the ASF dual-hosted git repository.

dope pushed a commit to branch fix_doc_error
in repository https://gitbox.apache.org/repos/asf/incubator-iotdb.git


The following commit(s) were added to refs/heads/fix_doc_error by this push:
     new 0ab5bea  Update Frequently asked questions.md
0ab5bea is described below

commit 0ab5beaaab2de98f2828e360fbb1434c43385b44
Author: XuYi <my...@users.noreply.github.com>
AuthorDate: Wed Mar 20 14:45:57 2019 +0800

    Update Frequently asked questions.md
---
 docs/Documentation/Frequently asked questions.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/Documentation/Frequently asked questions.md 
b/docs/Documentation/Frequently asked questions.md
index 775c921..67d4c23 100644
--- a/docs/Documentation/Frequently asked questions.md  
+++ b/docs/Documentation/Frequently asked questions.md  
@@ -78,7 +78,7 @@ Readme.md
 ...
 ```
 
-Let IOTDB_HOME = /workspace/incubator-iotdb/iotdb/iotdb
+Let $IOTDB_HOME = /workspace/incubator-iotdb/iotdb/iotdb
 Let $IOTDB_CLI_HOME = /workspace/incubator-iotdb/iotdb-cli/cli/
 
 By default settings, the logs are stored under ```IOTDB_HOME/logs```. You can 
change log level and storage path by configuring ```logback.xml``` under 
```IOTDB_HOME/conf```.