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(C# UWP/WinRT) SSH Parallel Remote Commands on Single Server

Shows how to execute multiple commands in parallel on a single SSH server and retrieve the command output for each.

Note: This example requires Chilkat v9.5.0.65 or greater.

Chilkat Universal Windows Platform (UWP) / WinRT Downloads

Chilkat for the Universal Windows Platform (UWP)

// This example assumes Chilkat SSH/SFTP to have been previously unlocked.
// See Unlock SSH for sample code.

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

int port = 22;
bool success = await ssh.ConnectAsync("the-ssh-server.com",port);
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Authenticate using login/password:
success = await ssh.AuthenticatePwAsync("theSshLogin","theSshPassword");
if (success != true) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Start several commands on the server.
int channel1 = await ssh.QuickCmdSendAsync("df");
if (channel1 < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

int channel2 = await ssh.QuickCmdSendAsync("date");
if (channel2 < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

int channel3 = await ssh.QuickCmdSendAsync("echo hello world");
if (channel3 < 0) {
    Debug.WriteLine(ssh.LastErrorText);
    return;
}

// Now collect the results of each command.
int pollTimeoutMs = 50;
int numFinished = 0;
while (numFinished < 3) {
    // Check to see if anything has finished.
    // QuickCmdCheck returns -1 if there are no errors and nothing else finished
    // QuickCmdCheck returns -2 if there was an error (such as a lost connection)
    // QuickCmdCheck returns a channel number if a channel finished.
    int channel = await ssh.QuickCmdCheckAsync(pollTimeoutMs);
    if (channel == -2) {
        Debug.WriteLine(ssh.LastErrorText);
        return;
    }

    if (channel >= 0) {
        Debug.WriteLine("---- channel " + Convert.ToString(channel) + " finished ----");
        Debug.WriteLine(ssh.GetReceivedText(channel,"ansi"));
        numFinished = numFinished + 1;
    }

}

// --------------
// Sample output:

// 	---- channel 105 finished ----
// 	hello world
// 
// 	---- channel 104 finished ----
// 	Thu Dec 22 17:43:58 CST 2016
// 
// 	---- channel 103 finished ----
// 	Filesystem    512-blocks      Used  Available Capacity  iused     ifree %iused  Mounted on
// 	/dev/disk2    2176716032 265739728 1910464304    13% 33281464 238808038   12%   /
// 	devfs                382       382          0   100%      662         0  100%   /dev
// 	map -hosts             0         0          0   100%        0         0  100%   /net
// 	map auto_home          0         0          0   100%        0         0  100%   /home
// 	/dev/disk3s2      374668    374668          0   100%    93665         0  100%   /Volumes/Google Chrome

 

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