param(
    [Parameter(Mandatory = $true)][string]$Cmd,
    [int]$TimeoutSec = 90
)
$ErrorActionPreference = 'Stop'
Import-Module Posh-SSH
$pw = ConvertTo-SecureString '0' -AsPlainText -Force
$cred = New-Object System.Management.Automation.PSCredential('tonycao', $pw)
$s = New-SSHSession -ComputerName 192.168.58.7 -Credential $cred -AcceptKey -Force
try {
    $r = Invoke-SSHCommand -SessionId $s.SessionId -Command $Cmd -TimeOut $TimeoutSec
    foreach ($l in $r.Output) { Write-Host $l }
    foreach ($l in $r.Error) { Write-Host "STDERR: $l" }
    Write-Host "EXIT:$($r.ExitStatus)"
} finally {
    Remove-SSHSession -SessionId $s.SessionId | Out-Null
}