Updated commands in Delete Key Value Pair and Combiner that were outdated (#134)

* Updated commands in Delete Key Value Pair and Combiner that were outdated

Author: Amemeda

docs/combiner.md

@@ -20,16 +20,17 @@ This tutorial uses the following Java class, which can be found in org.apache.ac
 
  * [StatsCombiner.java] - a combiner that calculates max, min, sum, and count
 
-This is a simple combiner example. To build this example run maven and then
-copy the produced jar into the accumulo lib dir. This is already done in the
-tar distribution.
+This is a simple combiner example. Before running it, follow the
+[setup instructions](../README.md#setup-instructions) so the examples jar is
+available to Accumulo. Restart your Accumulo instance to ensure the jar is
+picked up by the servers.
 
-    $ bin/accumulo shell -u username
+    $ accumulo shell -u root
     Enter current password for 'username'@'instance': ***
 
     Shell - Apache Accumulo Interactive Shell
     -
-    - version: 2.1.0-SNAPSHOT
+    - version: 4.0.0-SNAPSHOT
     - instance name: instance
     - instance id: 00000000-0000-0000-0000-000000000000
     -

docs/deleteKeyValuePair.md

@@ -19,7 +19,7 @@ limitations under the License.
 This example shows how Accumulo internals handle removing a key-value pair
 
 ```
-$ /path/to/accumulo shell -u username -p secret
+$ accumulo shell --user root --password secret
 username@instance> createnamespace examples
 username@instance> createtable examples.deleteKeyValuePair
 username@instance examples.deleteKeyValuePair> insert 567890 name first Joe
@@ -53,13 +53,14 @@ Scan accumulo.metadata table to see the list of RFiles Accumulo is currently usi
 
 ```
 username@instance examples.deleteKeyValuePair> scan -t accumulo.metadata -c file -r 1t<
-1t< file:hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007em.rf
+1t< file:{"path":"hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007em.rf","startRow":"","endRow":""} []	311,3
+
 ```
 
 View the contents of RFile and verify each key-value pair's deletion flag is false.
 
 ```
-$ /path/to/accumulo rfile-info -d hdfs://localhost/accumulo/tables/1t/default_tablet/F00007em.rf
+$ accumulo file rfile-info -d hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007em.rf
 RFile Version            : 8
 
 Locality group           : <DEFAULT>
@@ -87,20 +88,21 @@ Meta block     : RFile.index
 Delete a key-value pair and view a newly created RFile to verify the deletion flag is true.
 
 ```
-$ /path/to/accumulo shell -u username -p secret
+$ accumulo shell --user root --password secret
 username@instance> table examples.deleteKeyValuePair
 username@instance examples.deleteKeyValuePair> delete 567890 name first
 username@instance examples.deleteKeyValuePair> flush -w
 ```
 
 ```
 username@instance examples.deleteKeyValuePair> scan -t accumulo.metadata -c file -r 1t<
-1t< file:hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007em.rf
-1t< file:hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007fq.rf
+1t< file:{"path":"hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007em.rf","startRow":"","endRow":""} []	311,3
+1t< file:{"path":"hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007fg.rf","startRow":"","endRow":""} []	230,1
+
 ```
 
 ```
-$ /path/to/accumulo rfile-info -d hdfs://localhost/accumulo/tables/1t/default_tablet/F00007fq.rf
+$ accumulo file rfile-info -d hdfs://localhost:8020/accumulo/tables/1t/default_tablet/F00007fq.rf
 RFile Version            : 8
 
 Locality group           : <DEFAULT>
@@ -127,7 +129,7 @@ Meta block     : RFile.index
 Compact the RFiles and verify the key-value pair was removed.  The new RFile will start with 'A'.
 
 ```
-$ /path/to/accumulo shell -u username -p secret
+$ accumulo shell --user root --password secret
 username@instance> compact -t examples.deleteKeyValuePair -w
 2019-04-17 08:17:15,468 [shell.Shell] INFO : Compacting table ...
 2019-04-17 08:17:16,143 [shell.Shell] INFO : Compaction of table examples.deleteKeyValuePair 
@@ -136,11 +138,12 @@ completed for given range
 
 ```
 username@instance> scan -t accumulo.metadata -c file -r 1t<
-lt< file:hdfs://localhost:8020/accumulo/tables/1t/default_tablet/A00007g1.rf
+1t< file:{"path":"hdfs://localhost:8020/accumulo/tables/1t/default_tablet/A00007g1.rf","startRow":"","endRow":""} []	293,2
+
 ```
 
  ```
-$ /path/to/accumulo rfile-info -v hdfs://localhost/accumulo/tables/1t/default_tablet/A00007g1.rf
+$ accumulo file rfile-info -v hdfs://localhost:8020/accumulo/tables/1t/default_tablet/A00007g1.rf
 RFile Version            : 8
 
 Locality group           : <DEFAULT>