Simple Application Server:Check whether a Linux simple application server contains the files or directories required by SSH access

Procedure

1. Use the rescue feature to connect to the Linux simple application server. For more information, see Connect to a Linux server by using the rescue feature.

2. Run the following command to check whether the simple application server contains the sshd_config configuration file:

   ll /etc/ssh/sshd_config

   If the output is similar to the following message, the simple application server does not contain the sshd_config configuration file. In this case, you can use one of the following solutions based on your business scenario.

   

   • Run the scp command to copy a sshd_config configuration file

     1. Run the following command to copy a sshd_config configuration file from another simple application server to the simple application server that does not contain the configuration file:

        scp root@<Public IP address of the simple application server that contains the sshd_config configuration file>:/etc/ssh/sshd_config /etc/ssh

        For example, if the public IP address of the simple application server that contains the sshd_config configuration file is 120.27.XX.XX, run the following command:

        scp root@120.27.XX.XX:/etc/ssh/sshd_config /etc/ssh

     2. Run the following command to restart the sshd service:

        systemctl restart sshd

   • Roll back the system disk based on a snapshot

     If you created a snapshot for the simple application server, you can roll back the corresponding disk of the server based on the snapshot. For more information, see the "Roll back a disk based on a snapshot" section in the Manage snapshots topic.

3. Check whether you can connect to the Linux simple application server. For more information, see Connect to a Linux server.