[Docs] clarify launch port

Co-authored-by: Edenzzzz <wtan45@wisc.edu>

docs/source/en/basics/launch_colossalai.md

@@ -131,17 +131,18 @@ with one simple command. There are two ways you can launch multi-node jobs.
 
 This is suitable when you only have a few nodes. Let's say I have two nodes, namely `host1` and `host2`,  I can start
 multi-node training with the following command. Compared to single-node training, you must specify the `master_addr`
-option, which is auto-set to localhost if running on a single node only.
+option, which is auto-set to localhost if running on a single node only. \
+Additionally, you must also ensure that all nodes share the same open ssh port, which can be specified using --ssh-port.
 
 :::caution
 
-`master_addr` cannot be localhost when running on multiple nodes, it should be the hostname or IP address of a node.
+`master_addr` cannot be localhost when running on multiple nodes, it should be the **hostname or IP address** of a node.
 
 :::
 
 ```shell
 # run on these two nodes
-colossalai run --nproc_per_node 4 --host host1,host2 --master_addr host1 test.py
+colossalai run --nproc_per_node 4 --host host1,host2 --master_addr host1 test.py --ssh-port 22
 ```
 - Run with `--hostfile`
 

docs/source/zh-Hans/basics/launch_colossalai.md

@@ -116,17 +116,17 @@ colossalai run --nproc_per_node 4 --master_port 29505 test.py
 - 通过`--hosts`来启动
 
 这个方式适合节点数不多的情况。假设我们有两个节点，分别为`host`和`host2`。我们可以用以下命令进行多节点训练。
-比起单节点训练，多节点训练需要手动设置`--master_addr` （在单节点训练中`master_addr`默认为`127.0.0.1`）。
+比起单节点训练，多节点训练需要手动设置`--master_addr` （在单节点训练中`master_addr`默认为`127.0.0.1`）。同时，你需要确保每个节点都使用同一个ssh port。可以通过--ssh-port设置。
 
 :::caution
 
-多节点训练时，`master_addr`不能为`localhost`或者`127.0.0.1`，它应该是一个节点的名字或者IP地址。
+多节点训练时，`master_addr`不能为`localhost`或者`127.0.0.1`，它应该是一个节点的**名字或者IP地址**。
 
 :::
 
 ```shell
 # 在两个节点上训练
-colossalai run --nproc_per_node 4 --host host1,host2 --master_addr host1 test.py
+colossalai run --nproc_per_node 4 --host host1,host2 --master_addr host1 test.py --ssh-port 22
 ```