Chapter 10 Mobile, Linux, and OS X Operating Systems PC Support & Repair Chapter 10 Mobile, Linux, and OS X Operating Systems 5 days

Objectives After completing this chapter, you will meet these objectives: Explain how to configure, secure and troubleshoot mobile, Mac, and Linux operating systems. Explain the purpose and characteristics of mobile operating systems. Explain methods for securing mobile devices. Explain how to configure network connectivity and email on mobile devices. Explain the purpose and characteristics of Linux and OS X operating systems. Explain how to troubleshoot Mobile, Linux, and OS X operating systems.

Mobile operating systems 10.1

Open vs Closed Source Open Source Closed Source User can analyze & modify code of OS Android Closed Source OS’ source code not published or accessible iOS Both have SDKs to develop apps There is another way to install apps on Android mobile devices. Apps can be downloaded from different sources on the Internet and transferred to a mobile device through Wi-Fi, Bluetooth, data cable, or other methods. This is called sideloading. Sideloading an application is not recommended, because many sources for apps cannot be trusted. Only install apps from trusted sources and developers. Note: iOS devices do not support sideloading by default

App Sources Download Android apps from trusted sources Less chance of it having malicious code Google Play Amazon App Store iOS can only get apps from Apple App Store Windows only from Windows Store Apps “pulled” from store Can be “pushed” to a phone from computer or iTunes Sideloading- download Android app from Internet & transfer to phone via Wi-Fi, Bluetooth, or cable

Android Interface Navigation buttons on screen (usually) Apps Widgets Icons are shortcuts to the app Widgets Display info or functions on home screen Weather, clock, Wi-Fi, Power control Folders Can put multiple apps into a folder Drag one app onto another Google Assistant Widgets- rather than going into settings menu On Android devices, if a folder has two apps and one is removed, the folder is removed, but the remaining app replaces the folder on the home screen. To uninstall an app, go to Play Store or App Manager in Settings. Holding it and dragging it to remove, just removes the shotcut.

iOS Interface No navigation icons Home button No widgets, only apps Double-press for multitasking bar Hold for Siri No widgets, only apps No app shortcuts; it’s actual app Folders Hold app until jiggles & drag onto another Alert Badges- icon w/ # Siri

Windows Interface Tiles Folders Physical navigation buttons Apps that display info & are Interactive Tap to expand Can rearrange & resize Can be pinned to start; removed w/out uninstalling Folders Tap, hold & drag onto another Physical navigation buttons Cortana

Review- 5Q What is a safe place to get Android Apps? Google Play Which mobile OS does not use physical navigation buttons? Android On iOS, an app is showing a small number. What does it mean? Alert badge What is Windows virtual assistant? Cortana How are apps represented in the Windows phone interface? Tiles

Mobile Device Screen Accelerometer Brightness Sensor that measures the tilting motion and orientation of a mobile device Can enable/disable auto-rotation Brightness Uses the most battery power Auto-brightness setting

Mobile Device GPS Other than navigation… Geocaching- mapping app to find hidden containers Geotagging- embeds location into photo/video Search Results- displays results based on proximity Device tracking Make sure location services are on Note: Some Android and iOS devices do not have GPS receivers. These devices use information from Wi-Fi networks and cellular networks, if available, to provide location services.

Other Mobile Features Wi-Fi Calling Mobile Payments VPN Contactless NFC- waving phone near payment system VPN

Failed Login Attempts Android iOS Device locks after 4-12 failed attempts Unlock using Gmail account from setup iOS Disabled after 5 failed attempts 6th = disabled for 1 minute Beyond 6th= additional time 10th time= all data deleted Restore through iTunes

Remote Backup Backed up to the cloud Android iOS Automatically- calendar, mail, contacts iOS 5GB for free iCloud Android- some system settings, chrome browser data, hangouts chat log, apps (keeps track), photos if you enabled it

Remote Lock & Wipe Remote Lock (Lost Mode in iOS) Locks device remotely Can display a message, keep from ringing, play sound Remote Wipe (Erase Phone in iOS; Erase in Android) Deletes all data & goes back to factory state Note: For these remote security measures to function, the device must be powered on and connected to a cellular or Wi-Fi network.

Rooting & Jailbreaking Gain access to OS code Voids warranty for iOS devices Benefits: Customizable GUI Improve speed & responsiveness of device Overclock CPU & GPU Enable features disabled by carrier Remove bloatware Increases risk of virus infection

Activity Manual Email Setup Backup Data

Review- 4Q If an Android device is locked, how can you unlock it? Through Gmail What happens on an iOS device on the 10th failed login attempt? Data deleted In order to remote lock or wipe, what 2 things must apply? Phone on & connected to a network If a device has no GPS, how can it find where you are at? WiFi & cell network

Network connectivity & email 10.3

Configuring Email Display name, email address, email protocol, email server names, username & password Protocols: POP3 Email only stored on client device IMAP Synchronizes email folders between the server and client Syncs information about read/unread status, attachments and folders across all devices SMTP S/MIME Encrypts emails using certificates SSL (secure email transfer) Exchange (Outlook email, contacts, calendar) S/MIME stands for Secure/Multipurpose Internet Mail Extensions. To put it simply, it is a universal standard for securely signing and encrypting email. It is essentially used to prove that the email came from the person says it is from. POP3: Logging into each device, you will see lots of unread emails with no indication of which you deleted, read, flagged or filed Any folders you created and organize on one device won't be replicated on the other devices. IMAP: Syncs across all devices

Activity

Activity- ANSWERS

Linux & os x operating systems 10.4

Introduction UNIX Where’s Linux used? Non-proprietary OS Linux, OS X, Android & iOS based on UNIX Where’s Linux used? Embedded systems, wearables, PCs, supercomputers Thanks to Android! Ubuntu Desktop- pic

Linux GUI Launcher- dock with apps Top Menu Bar- like the Windows Taskbar (running apps, notifications) System & Notification Menu- notifications and shut down, volume, clock Dash Search Box- click the Ubuntu button in Launcher to search, view recently used apps Lenses- fine tune search results

OS X GUI OS X 10.10 is called Yosemite. Apple Menu- system preferences, power Application Menu- active application menu Menu Bar- everything across the top Notification Center Icon- Spotlight Icon- searching apps, docs, images, etc. Status Menu- date, time, features like Bluetooth Desktop- Dock- frequently used and running apps. Can force quit apps by right-clicking on them

Linux & OS X CLI Interact with the Kernel through the Shell Kernel is the core Allocates resources & manages file system Get to the CLI with terminal emulation program Linux- Terminator, xterm OS X- Terminal Shell/terminal

Activity Lab 10.4.1.4 - Install Linux in a Virtual Machine and Explore the GUI

Vulnerabilities Prevent infection fro malicious software OS updates (patches) Firmware updates Antivirus/antimalware software

Activity Lab 10.4.3.3 - Working with the Linux Command Line (limited/modified)

Basic troubleshooting for mobile, linux & OS x 10.5

Activity Lab 10.5.2.2 – Troubleshooting Mobile Devices

Chapter 10 Mobile, Linux, and OS X Operating Systems PC Support & Repair Chapter 10 Mobile, Linux, and OS X Operating Systems