diff --git a/lib/Interval4.js b/lib/Interval4.js
index 84abb51..308e8d2 100755
--- a/lib/Interval4.js
+++ b/lib/Interval4.js
@@ -183,73 +183,114 @@ class Interval4 extends Interval {
 		}
 	}
 
-	/*
-     * fetches the list of updates available for the machine
-     * format: [package-info|package-info|...]
-    */
-	getListOfUpdates(adapter) {
-      
-		if(machine.pkgMgr === undefined || machine.pkgMgr === null) {
-			adapter.log.debug('Package-Manager not initialized!');
-			return;
-		}
-      
+	debianUpdates(adapter) {
 		// we want to spawn commands
 		const cmd = require('child_process');
-      
 		const list = [];
-		switch(machine.platform) {
-			case 'linux':
-				// TODO implement for different package managers
-				if(machine.pkgMgr === 'apt') {
-					// debian packages with apt 
-					cmd.execSync('sudo apt update 2> /dev/null');
-					const lines = cmd.execSync('sudo apt list --upgradeable 2> /dev/null').toString().split('\n');
-					let k = 0;
-					let pkg;
-					for(let i = 0; i < lines.length; i++) {
-						if(lines[i].length > 16) {
-							pkg = lines[i].toString().split('/');
-							if(pkg != undefined && pkg[0] != undefined) {
-								list[k++] = pkg[0].trim();
+
+		cmd.exec('sudo apt update', (err, stdout, stderr) => {
+			if(err) {
+				adapter.log.error(err);
+			} else {
+				if(stderr) {
+					adapter.log.info(stderr.trim());
+				}
+				cmd.exec('sudo apt list --upgradeable', (err, stdout, stderr) => {
+					if(err) {
+						adapter.log.error(err);
+					} else {
+						if(stderr) {
+							adapter.log.info(stderr.trim());
+						} 
+						const lines = stdout.toString().split('\n');
+						let k = 0;
+						let pkg;
+						for(let i = 0; i < lines.length; i++) {
+							if(lines[i].length > 16) {
+								pkg = lines[i].toString().split('/');
+								if(pkg != undefined && pkg[0] != undefined) {
+									list[k++] = pkg[0].trim();
+								}
 							}
 						}
+						// maintain machine state
+						this.maintainStates(list, adapter);
 					}
-				} else if(machine.pkgMgr === 'yum') {
-					const lines = cmd.execSync('sudo yum check-update 2> /dev/null').toString().split('\n');
-					let k = 0;
-					// TODO: wie arbeitet yum
-					let pkg;
-					for(let i = 0; i < lines.length; i++) {
-						pkg = lines[i].toString().split('|');
-						if(pkg != undefined && pkg[1] != undefined) {
-							list[k++] = pkg[1].trim();
-						}
-					}
-				} else if(machine.pkgMgr === 'zypper') {
-					// redhat packages with zypper
-					cmd.execSync('sudo zypper refresh');
-					const lines = cmd.execSync('sudo zypper list-updates 2> /dev/null').toString().split('\n');
-					let k = 0;
-					let pkg;
-					for(let i = 5; i < lines.length; i++) {
-						pkg = lines[i].toString().split('|');
-						if(pkg != undefined && pkg[2] != undefined) {
-							list[k++] = pkg[2].trim();
-						}
-					}
-				}
-				break;
-			case 'darwin':
-			case 'win32':
-			default:
-				adapter.log.info('Update-Manager not implemented for ' + machine.platform);
-				break;
+				});
+			}
+		});
+	}
+
+	redhatUpdates(adapter) {
+		// we want to spawn commands
+		const cmd = require('child_process');
+		const list = [];
+
+		const lines = cmd.execSync('sudo yum check-update 2> /dev/null').toString().split('\n');
+		let k = 0;
+		// TODO: wie arbeitet yum
+		let pkg;
+		for(let i = 0; i < lines.length; i++) {
+			pkg = lines[i].toString().split('|');
+			if(pkg != undefined && pkg[1] != undefined) {
+				list[k++] = pkg[1].trim();
+			}
+		}
+		// maintain machine state
+		this.maintainStates(list, adapter);
+	}
+
+	suseUpdates(adapter) {
+		// we want to spawn commands
+		const cmd = require('child_process');
+		const list = [];
+
+		cmd.execSync('sudo zypper refresh');
+		const lines = cmd.execSync('sudo zypper list-updates 2> /dev/null').toString().split('\n');
+		let k = 0;
+		let pkg;
+		for(let i = 5; i < lines.length; i++) {
+			pkg = lines[i].toString().split('|');
+			if(pkg != undefined && pkg[2] != undefined) {
+				list[k++] = pkg[2].trim();
+			}
 		}
 		// maintain machine state
 		this.maintainStates(list, adapter);
 	}
 
+	/*
+     * fetches the list of updates available for the machine
+     * format: [package-info|package-info|...]
+    */
+	getListOfUpdates(adapter) {
+		// check package manager
+		if(machine.pkgMgr === undefined || machine.pkgMgr === null) {
+			adapter.log.debug('Package-Manager not initialized!');
+		} else {
+			switch(machine.platform) {
+				case 'linux':
+					// TODO implement for different package managers
+					if(machine.pkgMgr === 'apt') {
+						// debian packages with apt 
+						this.debianUpdates(adapter);
+					} else if(machine.pkgMgr === 'yum') {
+						// redhat updates with yum
+						this.redhatUpdates(adapter);
+					} else if(machine.pkgMgr === 'zypper') {
+						// redhat packages with zypper
+						this.suseUpdates(adapter);
+					}
+					break;
+				case 'darwin':
+				case 'win32':
+				default:
+					adapter.log.info('Update-Manager not implemented for ' + machine.platform);
+					break;
+			}
+		}
+	}
+
 	/*
      * Function checks battery state for all devices in every adapter
      * Currently implemented:
@@ -310,36 +351,47 @@ class Interval4 extends Interval {
 		const cmd = require('child_process');
 		let newController = '';
 		let newAdapter = '';
-		let lines = [];
+		const options = {};
 		switch(machine.platform) {
 			case 'linux':
-				lines = cmd.execSync('iobroker update 2> /dev/null',[],{cwd:'/opt/iobroker'}).toString().split('\n');
+				options.cwd = '/opt/iobroker';
 				break;
 			case 'win32':
-				lines = cmd.execSync('iobroker update 2> /dev/null',[],{cwd:'C:\\iobroker'}).toString().split('\n');
+				options.cwd ='C:\\iobroker';
 				break;
 			case 'darwin':
 			default:
-				adapter.log.info('Update-Manager not implemented for ' + machine.platform);
-				break;
+				adapter.log.info('IoBroker Update-Manager not implemented for ' + machine.platform);
+				// bail out
+				return;
 		}
-		for(let i = 0; i < lines.length; i++) {
-			// adapter.log.debug(lines[i]);
-			if(lines[i].search('Updateable') > 0) {
-				const content = lines[i].split(':');
-				const adapterName = content[0].split('"')[1];
-				const newVersion = content[1].split(' ')[1].trim();
-				// adapter.log.debug(adapterName);
-				if(adapterName == 'js-controller') {
-					newController = adapterName + '@' + newVersion;
-				} else { // Adapter
-					newAdapter = newAdapter + (adapterName + '@' + newVersion + ',');
+		cmd.execFile('iobroker', ['update'], options, (err, stdout, stderr) => { 
+			if(err) {
+				adapter.log.error(err);
+			} else {
+				if(stderr) {
+					adapter.log.error(stderr.trim());
+				}
+				const lines = stdout.toString().split('\n');
+				for(let i = 0; i < lines.length; i++) {
+					// adapter.log.debug(lines[i]);
+					if(lines[i].search('Updateable') > 0) {
+						const content = lines[i].split(':');
+						const adapterName = content[0].split('"')[1];
+						const newVersion = content[1].split(' ')[1].trim();
+						// adapter.log.debug(adapterName);
+						if(adapterName == 'js-controller') {
+							newController = adapterName + '@' + newVersion;
+						} else { // Adapter
+							newAdapter = newAdapter + (adapterName + '@' + newVersion + ',');
+						}
+					}
 				}
+				// adapter.log.debug(newController + '/' + newAdapter);
+				adapter.setForeignState(defs.hostEntryListOfAdapterUpdates, {val: newAdapter, ack: true});
+				adapter.setForeignState(defs.hostEntryControllerUpdate, {val: newController, ack: true});
 			}
-		}
-		// adapter.log.debug(newController + '/' + newAdapter);
-		adapter.setForeignState(defs.hostEntryListOfAdapterUpdates, {val: newAdapter, ack: true});
-		adapter.setForeignState(defs.hostEntryControllerUpdate, {val: newController, ack: true});
+		});
 	}
 
 // end of class