(C#) SSH Exec (Execute Command Line)

Shows how to execute a command on an SSH server and retrieve the command output.

Download: Chilkat .NET Assemblies

//  Important: It is helpful to send the contents of the
//  ssh.LastErrorText property when requesting support.

Chilkat.Ssh ssh = new Chilkat.Ssh();

//  Any string automatically begins a fully-functional 30-day trial.
bool success;
success = ssh.UnlockComponent("Anything for 30-day trial");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Connect to an SSH server:
string hostname;
int port;

//  Hostname may be an IP address or hostname:
hostname = "192.168.1.108";
port = 22;

success = ssh.Connect(hostname,port);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Wait a max of 5 seconds when reading responses..
ssh.IdleTimeoutMs = 5000;

//  Authenticate using login/password:
success = ssh.AuthenticatePw("myLogin","myPassword");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Open a session channel.  (It is possible to have multiple
//  session channels open simultaneously.)
int channelNum;
channelNum = ssh.OpenSessionChannel();
if (channelNum < 0) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  The SendReqExec method starts a command on the remote
//  server.   The syntax of the command string depends on the
//  default shell used on the remote server to run the command.
//  On Windows systems it is CMD.EXE.  On UNIX/Linux
//  systems the user's default shell is typically defined in /etc/password.

//  Here are some examples of command lines for <b>Windows SSH servers</b>:

//  Get a directory listing:
string cmd1;
cmd1 = "dir";

//  Do a nameserver lookup:
string cmd2;
cmd2 = "nslookup chilkatsoft.com";

//  List a specific directory.  Given that the shell is CMD.EXE, backslashes must
//  be used:
string cmd3;
cmd3 = "dir \\temp";

//  Execute a sequence of commands.  The syntax for CMD.EXE may be found
//  here: http://technet.microsoft.com/en-us/library/bb490880.aspx.  Notice how the commands
//  are separated by "&&" and the entire command must be enclosed in quotes:
string cmd4;
cmd4 = "\"cd \\temp&&dir\"";

//  Here are two examples of command lines for <b>Linux/UNIX SSH servers</b>:

//  Get a directory listing:
string cmd5;
cmd5 = "ls -l /tmp";

//  Run a series of commands (syntax may depend on your default shell):
string cmd6;
cmd6 = "cd /etc; ls -la";

//  Request a directory listing on the remote server:
//  If your server is Windows, change the string from "ls" to "dir"
success = ssh.SendReqExec(channelNum,"ls");
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Call ChannelReceiveToClose to read
//  output until the server's corresponding "channel close" is received.
success = ssh.ChannelReceiveToClose(channelNum);
if (success != true) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Let's pickup the accumulated output of the command:
string cmdOutput;
cmdOutput = ssh.GetReceivedText(channelNum,"ansi");
if (cmdOutput == null ) {
    MessageBox.Show(ssh.LastErrorText);
    return;
}

//  Display the remote shell's command output:
textBox1.Text += cmdOutput + "\r\n";

//  Disconnect
ssh.Disconnect();