Merge pull request #9004 from spzala/readme

Update Running etcd section for pre-built install of etcd

README.md

@@ -51,7 +51,22 @@ For those wanting to try the very latest version, [build the latest version of e
 
 ### Running etcd
 
-First start a single-member cluster of etcd:
+First start a single-member cluster of etcd.
+
+If etcd is installed using the [pre-built release binaries][github-release], run it from the installation location as below:
+
+```sh
+/tmp/etcd-download-test/etcd
+```
+The etcd command can be simply run as such if it is moved to the system path as below:
+
+```sh
+mv /tmp/etcd-download-test/etcd /usr/locale/bin/
+
+etcd
+```
+
+If etcd is [build from the master branch][dl-build], run it as below:
 
 ```sh
 ./bin/etcd