Project.js

Shell.exec("ssh-keyscan"
                    + " -p " + parsedUrl.port
                    + " -t rsa "
                    + parsedUrl.hostname, function(code, output) {

                        var commentedKey = output.split('\n');
                        var key = commentedKey[1].split(' ');
                        publicKey = key[1] + ' ' + key[2];
                        hostString = '[' + parsedUrl.hostname + ']:' + parsedUrl.port
                                  + ',[' + remoteIP + ']:' + parsedUrl.port
                                  + ' ' + publicKey + '\n';

                        knownHosts = (knownHosts == null) ? [''] : knownHosts.split('\n');

                        var inFile = false;
                        for (var i = 0; i < knownHosts.length; i++) {
                          if (hostString == knownHosts[i]) inFile = true; // <<<<<<<<<<<<<<<<<<<<
                        }

                        if(inFile == false) {
                          hostString.toEnd(knownHostPath);
                          reply('New key added into the known_hosts');
                        }
                        else {
                          reply('The key is already in known_hosts');
                        }

                    });