Node.js

SSH Parallel Remote Commands on Single Server

See more SSH Examples

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

NODEJS_PRELUDE

function chilkatExample() {

    var success = false;

    //  This example requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    var ssh = new chilkat.Ssh();

    var port = 22;
    success = ssh.Connect("the-ssh-server.com",port);
    if (success !== true) {
        console.log(ssh.LastErrorText);
        return;
    }

    //  Authenticate using login/password:
    success = ssh.AuthenticatePw("theSshLogin","theSshPassword");
    if (success !== true) {
        console.log(ssh.LastErrorText);
        return;
    }

    //  Start several commands on the server.
    var channel1 = ssh.QuickCmdSend("df");
    if (channel1 < 0) {
        console.log(ssh.LastErrorText);
        return;
    }

    var channel2 = ssh.QuickCmdSend("date");
    if (channel2 < 0) {
        console.log(ssh.LastErrorText);
        return;
    }

    var channel3 = ssh.QuickCmdSend("echo hello world");
    if (channel3 < 0) {
        console.log(ssh.LastErrorText);
        return;
    }

    //  Now collect the results of each command.
    var pollTimeoutMs = 50;
    var 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.
        var channel = ssh.QuickCmdCheck(pollTimeoutMs);
        if (channel == -2) {
            console.log(ssh.LastErrorText);
            return;
        }

        if (channel >= 0) {
            console.log("---- channel " + channel + " finished ----");
            console.log(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

}

chilkatExample();