B4J Question How to kill running process in PI2

kill -9 <PID> 'by pid
pkill <processname>   'by process name

Sub Kill As Boolean
    Private sh As Shell
    sh.Initialize("shl", "sudo", Array As String("pkill","nodejs"))
    sh.WorkingDirectory="/home/pi/OpenPLC_v2"   
    sh.Run(1000)
    '
    sh.Initialize("shl", "sudo", Array As String("pkill","-f","./core/openplc"))
    sh.WorkingDirectory="/home/pi/OpenPLC_v2/core"   
    sh.Run(1000)
End Sub