ssh进入没有主目录的帐户

作为我上一个问题的跟进，我决定如下创建本地用户帐户。

adduser --system --no-create-home USERNAME

现在，我希望本地用户能够使用来访问计算机ssh。根据我的理解，其ssh工作原理如下。

假设我有2台机器（例如alpha和beta）。

• 从Alpha机：ssh user@beta
• alpha的公钥将出现~/.ssh/authorized_keys在beta机中。
• alpha的私钥将出现/~/.ssh在alpha机器中。

现在，我已经计划实施没有回家的用户。因此，假设我adduser进入没有任何用户家园的Beta机器，我是否仍然可以从alpha转换为beta？

~/.ssh/只是sshd用于查找传入用户的公共密钥的默认位置。您可以sshd通过修改中的AuthorizedKeysFile指令 来配置位置和要查找的文件/etc/ssh/sshd_config。我的当前看起来像：

AuthorizedKeysFile     %h/.ssh/authorized_keys

该sshd_config手册页提供了更多的细节：

 AuthorizedKeysFile
     Specifies the file that contains the public keys that can be used for user authentication.  The format is
     described in the AUTHORIZED_KEYS FILE FORMAT section of sshd(8).  AuthorizedKeysFile may contain tokens of
     the form %T which are substituted during connection setup.  The following tokens are defined: %% is
     replaced by a literal '%', %h is replaced by the home directory of the user being authenticated, and %u is
     replaced by the username of that user.  After expansion, AuthorizedKeysFile is taken to be an absolute
     path or one relative to the user's home directory.  Multiple files may be listed, separated by whitespace.
     The default is “.ssh/authorized_keys .ssh/authorized_keys2”.

请注意，这sshd对于用户authorized_key文件的权限非常重要。如果您进行了设置并遇到登录问题，则需要密切注意日志。