Linux+ Study Notes

Setup CentOS VM’s

  1. Install VirtualBox (a.k.a. VB) and the extension pack
  2. Download the ISO from HTTP://
  3. Set up a new VM with centos default settings
    • Use hostname: rhhost1
    • Tip: Ensure virtual support is enabled in BIOS/UEFI/hostOS
    • Tip: enter centos as hostname so that VB pre-populates all RedHat settings for you, then change the hostname to whatever you want
    • Tip: Ensure you set the HDD size to at least 10 GB for CentOS 8.4
  4. After the VM is set up, update settings as follow
    • In System > Motherboard, change Memory to 2 GB
    • In System > Processor, increase processor count where possible for better performance
    • In Acceleration > Paravirtualization Interface, use one of the following: Default, Legacy, Hyper-V, KVM
      • Tip: You may choose Default or Legacy to make it work, then change to other options later
    • In Display > Screen, increase Video Memory (to 128 MB), change Graphics Controller to VBoxSVGA for better performance if Linux host is used, and check Enable 3D Acceleration
  5. Start the VM usingthe downloaded CentOS iso, complete the install with settings below
    • For software package, choose Server with GUI
    • Set up additional admin users
  6. Set up persistent network connection
    • In the top right menu, click Wired Off then Wired Settings, turn on Wired, click on the gear icon, check Connect Automatically
  7. Set up VBoxGuestAdditions for better graphics, network, and mouse integration
    • Open a terminal
      • sudo yum update -y
      • sudo reboot
        • Tip: skipping this task may cause subsequent tasks to fail
      • sudo yum group install -y “Development tools”
      • sudo yum install -y kernel-devel
      • Close the terminal
    • Under Device menu of the VM, choose Insert Guest Additions CD image… and Run
  8. Set up network
    • Turn off the VM
    • In Network > Adapter 1 of the VM configuration, change Attached to to Bridged Adapter and choose the name for the host adapter
    • Do the same for Adapter 2
  9. Set up additional drives for RAID
    • In Storage, right click Controller SATA then click Hard Disk
    • Create four new disks with default settings, but choose 1 GB for size
    • Ensure the new disks have similiar names but with #1-4 at the end
    • Attach all four disks in sequence
  10. Clone CentOS VM
    • While the VM is off, right-click the VM and click clone
    • Use hostname rhhost2
    • Choose Generate new MAC addresses for all network adapters
    • Choose Keep Disk Names
    • Choose Linked clone
  11. Confirm VM’s are working
    • Boot up the VM’s and confirm network connectivity
    • You may turn off the VM’s, and in System > Acceleration, change Paravirtualization Interface to Hyper-V or KVM for better performance as needed
    • Boot up the VM’s again and confirm
    • Update hostname(s) as needed
      • Open a terminal
      • sudo hostnamectl set-hostname
  12. Create snapshots
    • Ctrl-T to initiate, enter a name (e.g. Base install), and create the snapshot
    • To restore to the snapshot, click the red X on top right to close the window, choose Power Off, and check Restore to the snapshot on boot

Setup Ubuntu VM

Perform all steps for CentOS with exceptions below

  1. Already completed with CentOS and no need to repeat
  2. Download the 64-bit Ubuntu desktop iso
  3. Install using hostname ubhost1 and change HDD size to at least 15 GB for Ubuntu 20.04
  4. No change for this step
  5. Start the VM using the downloaded Ubuntu iso
  6. Network connection should already be persistent
  7. No terminal command should be required, just choose Insert Guest Additions CD image… and Run
  8. No need to set up network
  9. No need to setup additional drives
  10. No need to clone
  11. No change for this step
  12. No change for this step

Online entertainment during COVID19

1. 紐約公共圖書館 超過30萬本書可免費下載

2. IDFA online #阿姆斯特丹國際紀錄片節 免費資源

3. 羅浮宮、大英博物館等網路導覽,還有國家公園和水族館

4. Verso Books 免費下載

5. Haymarket Books 免費下載

6. Google Arts & Culture 超過70國1200間博物館美術館線上看展品

7. 五萬本免費著色簿給各位瀕臨崩潰的父母親

8. 柏林愛樂數位音樂廳(註冊帳號以BERLINPHIL密碼兌換,3/31前可免費聽到飽)

9. 底特律交響樂團演奏會 影音檔全開放

10. 大都會歌劇院 每晚7:30線上播映完整歌劇,每齣劇開放20小時免費線上收看

11. JSTOR 論文數據庫

12. Collectif Jeune Cinema 超過250部實驗電影線上免費看

13. 紐約百老匯音樂劇 影音串流平台7天免費看 一個月8.99美金

14. 改變人生的100個紀錄片

15. 溫哥華水族館

16. NASA線上影音圖書館

17. 以設計相關紀錄片聞名的獨立製片人 Gary Hustwit ,在疫情期間將每週免費開放一部紀錄片(3/17-24)

18. 馬遜全球聽書免費開放
為全世界暫時無法上學的孩子上線了Audible Stories。所有有聲書免費收聽,內容覆蓋學齡前到經典文學,無需下載app無需登錄無廣告,英/德/法/西/意/日六種語言。

19. 莫斯科大劇院Youtube頻道:
莫斯科大劇院(Bolshoi Theatre of Russia)宣佈,會歷史上首次將多個經典歌劇及芭蕾舞演出(稱為「黃金系列」)於劇院的Youtube頻道上livestream直播供大家免費觀賞。

Muster the Power

A few ideas below to learn more about power

Relationship Capital Leadership

Four Switches to Selling Anything, by Peter Yang and @thepeteryang
1. Solution
2. Trust
3. Likability
4. Evidence

Crucial Conversations by Joseph Grenny, Kerry Patterson, et al.

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