private static string host = "xxx.xxx.xxx.xx";        private static string username = "root";        private static string password = "pwd";        // Setup Credentials and Server Information        public static ConnectionInfo ConnNfo = new ConnectionInfo(host, 22, username,             new AuthenticationMethod[]{                // Pasword based Authentication                new PasswordAuthenticationMethod(username,password),                 // Key Based Authentication (using keys in OpenSSH Format)                 //new PrivateKeyAuthenticationMethod("username",new PrivateKeyFile[]{                 //    new PrivateKeyFile(@"..\openssh.key","passphrase")                 //}),             }         );        static void Main(string[] args)        {            ExecuteCommand1();            ExecuteCommand2();            Upload();            Console.ReadLine();        }        /// <summary>        /// 开始        /// </summary>        public void Start()        {            using (var client = new SshClient(host, username, password))            {                try                {                    string command = "ls";                    client.Connect();                    string result = client.RunCommand(command).Execute();                    Console.WriteLine(result);                    client.Disconnect();                }                catch (Exception e1)                {                    Console.WriteLine(e1.Message);                }            }        }        /// <summary>        /// 执行 command        /// </summary>        public static void ExecuteCommand1()        {            using (var sshclient = new SshClient(ConnNfo))            {                sshclient.Connect();                using (var cmd = sshclient.CreateCommand("cd /local && ls"))                {                    string result = cmd.Execute();                    Console.WriteLine("Command>" + cmd.CommandText);                    Console.WriteLine("Return Value = http://www.mamicode.com/{0}", cmd.ExitStatus);                    Console.WriteLine("result>" + result);                }                sshclient.Disconnect();            }        }        /// <summary>        /// 执行 command        /// </summary>        public static void ExecuteCommand2()        {            // Execute (SHELL) Commands            using (var sshclient = new SshClient(ConnNfo))            {                sshclient.Connect();                // quick way to use ist, but not best practice - SshCommand is not Disposed, ExitStatus not checked...                Console.WriteLine(sshclient.CreateCommand("cd /local && ls -lah").Execute());                Console.WriteLine(sshclient.CreateCommand("pwd").Execute());                Console.WriteLine(sshclient.CreateCommand("cd /local/soft && ls -lah").Execute());                sshclient.Disconnect();            }        }        /// <summary>        /// 上传        /// </summary>        public static void Upload()        {            using (var sftp = new SftpClient(ConnNfo))            {                string uploadfn = "Renci.SshNet.dll";                sftp.Connect();                sftp.ChangeDirectory("/local/soft");                using (var uplfileStream = System.IO.File.OpenRead(uploadfn))                {                    sftp.UploadFile(uplfileStream, uploadfn, true);                }                sftp.Disconnect();            }        }