How to Execute Commands on a Remote Machine with Go?
Nov 07, 2024 pm 09:35 PMExecute Commands on a Remote Machine with Go
Executing commands on a remote machine through SSH can be achieved with the "golang.org/x/crypto/ssh" package.
To establish a connection, create a client configuration with the user, host address, and authentication method (PublicKeys or Password).
Once connected, a session can be created for each command execution. By setting the session.Stdout value, the command's output can be captured in a buffer.
The provided example function, remoteRun(), demonstrates how to run a specific command on a remote machine and return the result:
func remoteRun(user string, addr string, privateKey string, cmd string) (string, error) { // Parse the private key and configure the SSH client key, err := ssh.ParsePrivateKey([]byte(privateKey)) if err != nil { return "", err } config := &ssh.ClientConfig{ User: user, HostKeyCallback: ssh.InsecureIgnoreHostKey(), Auth: []ssh.AuthMethod{ ssh.PublicKeys(key), }, } // Connect to the remote machine client, err := ssh.Dial("tcp", net.JoinHostPort(addr, "22"), config) if err != nil { return "", err } // Create a new session session, err := client.NewSession() if err != nil { return "", err } defer session.Close() // Capture stdout for the command var b bytes.Buffer session.Stdout = &b // Execute the command and return the output err = session.Run(cmd) return b.String(), err }
By utilizing this approach, you can easily execute commands on remote machines from your Go CLI and process their outputs.
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