Exclude SSH Command Execution Status from Output - go

Question

I am trying to develop a SSH client using Go language. I've written the below code to get commands from user, execute them on the remote server and print the response.
There's a small problem with the below code. Printing output on the screen prints the command execution status(nil/error status) at the end of response. How do I exclude this from my output?
SSH.go
package main
import "fmt"
import "io"
import "bufio"
import "os"
import "net"
import "golang.org/x/crypto/ssh"
func main(){
sshConfig := &ssh.ClientConfig{
User: "[USERNAME]",
Auth: []ssh.AuthMethod{
ssh.Password("[PASSWORD]"),
},
HostKeyCallback: func(hostname string, remote net.Addr, key ssh.PublicKey) error {
return nil
},
}
connection,err := ssh.Dial("tcp", "[IP]:[PORT]", sshConfig)
if err != nil {
fmt.Println("Failed to connect: %s", err)
}
reader := bufio.NewReader(os.Stdin)
for{
input, _ := reader.ReadString('\n')
session,err := connection.NewSession()
if err != nil {
fmt.Println("Failed to create session: %s", err)
}
stdout,err := session.StdoutPipe()
if err != nil {
fmt.Println("Failed to get stdout: %s", err)
}
go io.Copy(os.Stdout, stdout)
output := session.Run(input);
fmt.Println(output)
}
}
Current Result
hello
Process exited with status 127
df -hP /tmp
Filesystem Size Used Avail Use% Mounted on
/dev/sda6 198G 13G 176G 7% /
<nil>
Expected Result
hello
df -hP /tmp
Filesystem Size Used Avail Use% Mounted on
/dev/sda6 198G 13G 176G 7% /

Answer 1

The <nil> pinted above is the output of session.Run, which returns an error (as per docs).
The output of the command is already being displayed on your console by the following goroutine:
go io.Copy(os.Stdout, stdout)
You don't need to print the output, which is nil since no error occurs when session.Run is call complete. A better thing to do would be to check the error:
// ...
if err := session.Run(input); err != nil {
// handle error
}
// ...