Change default database path from /var/db to /var/lib

Change-Id: Iec7daab14931ebe178f85931870bcf9c527be79b
diff --git a/INSTALL.md b/INSTALL.md
index cc8fc6e..8ef9774 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -34,12 +34,11 @@
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 The database path is set in "storage.path" key of the config file.
-The default database path is `/var/db/ndn-repo-ng`.
+The default database path is `/var/lib/ndn/repo-ng`.
 
 `ndn-repo-ng` automatically creates a database if one does not exist.
 
-Users should make sure the `ndn-repo-ng` process has write privilege to the database path.
-If the default `/var/db/ndn-repo-ng` is used, repo-ng needs to be started with `sudo`.
+Users should make sure the `ndn-repo-ng` process has write privileges to the database path.
 
 Tools
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