You can check the version of SSH (Secure Shell) on an Ubuntu server by running the following command in the terminal:

$ ssh -V

This will display the version of the SSH client installed on your system. If you want to check the version of the SSH server, you can connect to the server using SSH and run the same command.

Alternatively, you can check the version of the OpenSSH package installed on your Ubuntu server by running the following command:

File and folder permissions can be a problem sometimes and can cause errors when not set properly on your server.

For WordPress installations, you can set the proper permissions with the following commands:

Set all directory permissions:

find . -type d -exec chmod 755 {} \;

Set all file permissions:

find . -type f -exec chmod 644 {} \;