Combine two commands into one.

README.md

@@ -117,9 +117,7 @@ The default user name and password for the web UI is 'vagrant'.
 
 2. After you run the above command if you were to get a `"kernel mismatch error"`. To get past this error please run the below commands:
 
-    `vagrant ssh ohpc`
-
-    `uname -r`
+    `vagrant ssh ohpc -c "uname -r"`
 
     Copy and paste this kernel version in the group_vars/all to update the kernel version in the `build_kernel_ver` variable.