These commands create an ER domain of two root nodes.
这些命令创建了两个根节点的er域。
Root can ssh between nodes without a password.
不用输入密码就可以以根用户身份在节点之间以ssh 连接。
The root node will be gallery, which contains any number of photo nodes.
根节点是 gallery，它包含任意多个photo节点。
The root node will be gallery, which contains any number of photo nodes.
根节点是 gallery，它包含任意多个photo节点。
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