pssh:tldr:1977b

The command you provided appears to be using the "pssh" tool to execute commands on multiple remote hosts simultaneously. Let's break down the command:

pssh: The name of the commandline tool used to perform parallel SSH (secure shell) operations.

-i: This flag instructs pssh to provide an interactive session on the remote hosts. It allows for user input and interaction.

-h ${path-to-hosts_file}: This flag specifies the path to a file that contains a list of hostnames or IP addresses of the remote machines to connect to. You need to replace ${path-to-hosts_file} with the actual path to your hosts file.

-x "${-O VisualHostKey=yes}": This flag is used to control SSH options. In this case, it's setting the option VisualHostKey to "yes" using the -O flag. The VisualHostKey option adds a graphical representation of the SSH host key to the output, making it easier to visually identify the remote hosts.

${hostname -i}: This part seems to be incorrect in the command you provided. It looks like an attempt to dynamically substitute the command prompt's output with the IP address of the current machine. However, the correct syntax for that would be $(hostname -i) instead of ${hostname -i}. The $(command) syntax is used to execute a command and substitute its output.

Once you fix the syntax for the hostname -i command substitution, this part of the command will provide the IP address of the current machine to connect to the remote hosts.

In summary, the command you provided executes an interactive SSH session on multiple remote hosts specified in the hosts file. It enables the VisualHostKey SSH option, which allows for easier identification of the remote hosts by showing a visual representation of their SSH keys.