欢迎消息中出现奇怪的输出

欢迎消息中出现奇怪的输出

几天前我发现我无法通过sftp.然后我发现当我通过 登录时,欢迎消息中有一个点ssh

 .Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.15.0-72-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

 * Ubuntu 20.04 LTS is out, raising the bar on performance, security,
   and optimisation for Intel, AMD, Nvidia, ARM64 and Z15 as well as
   AWS, Azure and Google Cloud.

     https://ubuntu.com/blog/ubuntu-20-04-lts-arrives


31 packages can be updated.
0 updates are security updates.

*** System restart required ***

“欢迎来到...”前面有一个点。我确信这个点不是 motd 的一部分。我尝试ssh username@remote "echo hello",并得到“.hello”。我试图找出它来自哪里但失败了,而且我是 Linux 新手。有人知道这个点从哪里来吗?

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