Update Console introduction

docs-2.0/nebula-console.md

@@ -1,14 +1,55 @@
 # Nebula Console
 
-Nebula Console is a native CLI client for Nebula Graph. It can be used to connect a Nebula Graph cluster and execute queries. It can also support special commands to manage parameters, export query results, import test datasets, etc. This topic describes these special commands.
+Nebula Console is a native CLI client for Nebula Graph. It can be used to connect a Nebula Graph cluster and execute queries. It also supports special commands to manage parameters, export query results, import test datasets, etc.
 
-To connect Nebula Graph using Nebula Console, see [Step 3: Connect to Nebula Graph](2.quick-start/3.connect-to-nebula-graph.md).
+## Obtain Nebula Console
 
-!!! note
+You can obtain Nebula Console in the following ways:
+
+- Obtain the binary file of Nebula Console from the `bin` directory in the Nebula Graph installation path.
+
+- Download the binary file from the [GitHub releases page](https://github.com/vesoft-inc/nebula-console/releases "the nebula-console Releases page").
+
+- Compile the source code to obtain the binary file. For more information, see [Install from source code](https://github.com/vesoft-inc/nebula-console#from-source-code).
+
+## Nebula Console functions
+
+### Connect to Nebula Graph
+
+To connect to Nebula Graph with the `nebula-console` file, use the following syntax:
+
+```bash
+<path_of_console> -addr <ip> -port <port> -u <username> -p <password>
+```
 
-    The commands are case insensitive.
+`path_of_console` indicates the storage path of the Nebula Console binary file.
 
-## Manage parameters
+Parameter descriptions are as follows:
+
+| Parameter | Description |
+| - | - |
+| `-h/-help` | Shows the help menu. |
+| `-addr/-address` | Sets the IP address of the Graph service. The default address is 127.0.0.1. If Nebula Graph is deployed on [Nebula Cloud](https://docs.nebula-graph.io/2.6.2/nebula-cloud/1.what-is-cloud/), you need to create a Private Link and set the IP address of the Private Endpoint as the parameter value. |
+| `-P/-port` | Sets the port number of the graphd service. The default port number is 9669. |
+| `-u/-user` | Sets the username of your Nebula Graph account. Before enabling authentication, you can use any existing username. The default username is `root`. |
+| `-p/-password` | Sets the password of your Nebula Graph account. Before enabling authentication, you can use any characters as the password. |
+| `-t/-timeout`  | Sets an integer-type timeout threshold of the connection. The unit is second. The default value is 120. |
+| `-e/-eval` | Sets a string-type nGQL statement. The nGQL statement is executed once the connection succeeds. The connection stops after the result is returned. |
+| `-f/-file` | Sets the path of an nGQL file. The nGQL statements in the file are executed once the connection succeeds. The result will be returned and the connection stops then. |
+| `-enable_ssl` | Enables SSL encryption when connecting to Nebula Graph. |
+| `-ssl_root_ca_path` | Sets the storage path of the certification authority file. |
+| `-ssl_cert_path` | Sets the storage path of the certificate file. |
+| `-ssl_private_key_path` | Sets the storage path of the private key file. |
+
+For information on more parameters, see the [project repository](https://github.com/vesoft-inc/nebula-console/tree/{{console.branch}}).
+
+For example, to connect to the Graph Service deployed on 192.168.10.8, run the following command:
+
+```bash
+./nebula-console -addr 192.168.10.8 -port 9669 -u Joe -p Joespassword
+```
+
+### Manage parameters
 
 You can save parameters for parameterized queries.
 
@@ -58,7 +99,7 @@ You can save parameters for parameterized queries.
   nebula> :param <param_name> =>;
   ```
 
-## Export query results
+### Export query results
 
 Export query results,  which can be saved as a CSV file or DOT file.
 
@@ -89,7 +130,7 @@ Export query results,  which can be saved as a CSV file or DOT file.
   nebula> PROFILE FORMAT="dot" GO FROM "player100" OVER follow;
   ```
 
-## Import a testing dataset
+### Import a testing dataset
 
 The testing dataset is named `basketballplayer`. To view details about the schema and data, use the corresponding `SHOW` command.
 
@@ -99,7 +140,7 @@ The command to import a testing dataset is as follows:
 nebula> :play basketballplayer
 ```
 
-## Run a command multiple times
+### Run a command multiple times
 
 To run a command multiple times, use the following command:
 
@@ -145,15 +186,15 @@ Fri, 20 Aug 2021 06:36:05 UTC
 Executed 3 times, (total time spent 3681/4734 us), (average time spent 1227/1578 us)
 ```
 
-## Sleep to wait
+### Sleep
 
-This command will make Nebula Graph services sleep and wait for N seconds. The schema is altered in an async way and takes effect in the next heartbeat cycle. Therefore, this command is usually used when altering schema. The command is as follows:
+This command will make Nebula Console sleep for N seconds. The schema is altered in an async way and takes effect in the next heartbeat cycle. Therefore, this command is usually used when altering schema. The command is as follows:
 
 ```ngql
 nebula> :sleep N
 ```
 
-## Disconnect Nebula Console from Nebula Graph
+### Disconnect Nebula Console from Nebula Graph
 
 You can use `:EXIT` or `:QUIT` to disconnect from Nebula Graph. For convenience, Nebula Console supports using these commands in lower case without the colon (":"), such as `quit`.
 
@@ -162,11 +203,5 @@ The example is as follows:
 ```ngql
 nebula> :QUIT
 
-Bye root!
+Bye Joe!
 ```
-
-## FAQ
-
-### "How can I install Nebula Console from the source code?"
-
-To download and compile the latest source code of Nebula Console, follow the instructions on [the nebula console GitHub page](https://github.com/vesoft-inc/nebula-console#build-nebula-graph-console).