README.md in rcmd-1.5.7 vs README.md in rcmd-1.5.8

- old
+ new

@@ -19,18 +19,19 @@
 # Usage Examples
 
 ## Help Screen
 
 ```bash
-daibhidh@darkstar:~/$ rcmd --help
 Usage: rcmd [options]
     -u, --username username          Username for SSH connections
     -n, --nodes x,y,z                Comma seperated list of nodes. use '-' for a space seperated list piped from another command
+    -r, --regexp regex               Use Regex to build host list (ruby regexp)
     -t, --threads threads            Number of threads to run
     -c, --command <command>          Quoted string containing the command to be run
     -q, --quiet                      Suppress stdout of commands.  stderr will still be displayed
-	-v, --version                    Print what version of the command is in use
+    -v, --version                    Print what version of the command is in use
+    -D, --debug                      Print debug information
 ```
 
 ## Specifying nodes manually
 Specifying a comma seperated list of hosts and timing the total execution time.
 ```bash 
@@ -54,11 +55,24 @@
 node3.example.com :: Red Hat Enterprise Linux ComputeNode release 6.9 (Santiago)
 node2.example.com :: Red Hat Enterprise Linux ComputeNode release 6.8 (Santiago)
 node4.example.com :: Red Hat Enterprise Linux ComputeNode release 6.9 (Santiago)
 ```
 
-## Using a database for obtaining nodes
-TODO
+## Using regex to build node list
+```bash
+daibhidh@darkstar:~/$ rcmd -r 'node([1-9]|1[1-2])$' -c 'hostname -f'
+node2 :: node2.example.com
+node1 :: node1.example.com
+node4 :: node4.example.com
+node3 :: node3.example.com
+node5 :: node5.example.com
+node6 :: node6.example.com
+node8 :: node8.example.com
+node7 :: node7.example.com
+node11 :: CONNECT ERROR :: Unable to connect to host!
+node9 :: node9.example.com
+node12 :: node12.example.com
+```
 
 # Development
 
 If you are wanting to modify the code by all means do so.  If you clone this repository you can then run `bundle install` to install the dependencies needed.  Tests are performed with *rspec* and can be run with *rake*. 
 