• install pip, if the python is 2.7, install pip3 if the python is 3.5 or above

  sudo apt install python-pip

• install PyQt4 if 2.7 or PyQt5 if 3.5 above

  sudo apt-get update
  sudo apt-get install pyqt4-dev-tools

• install QtCreator (Qt5 + Cpp) (ref)

  sudo apt-get install build-essential
  sudo apt-get install qtcreator
  sudo apt-get install qt5-default

• to run QtCreator

  qtcreator

• QtCreator tutorial:
  • Adding/Setting up Android into Qt Creator
    • https://www.youtube.com/watch?v=dQUGBQ_yzdc
    • https://www.packtpub.com/books/content/setting-qt-creator-android
    • http://doc.qt.io/qtcreator/creator-deploying-android.html
    • https://www.youtube.com/watch?v=WFGRr0DV3oM

• Before you install App, in the Ubuntu Software menu > Software and Update, make sure Download From drop down list choose the server in or close to your location. so that install and all process is faster.

VSCode

• ref: https://code.visualstudio.com/Download
• (optional if you have curl)

  sudo apt-get install curl

• install code from cmd (https://code.visualstudio.com/docs/setup/linux)

  curl https://packages.microsoft.com/keys/microsoft.asc | gpg --dearmor > microsoft.gpg
  sudo mv microsoft.gpg /etc/apt/trusted.gpg.d/microsoft.gpg
  sudo sh -c 'echo "deb [arch=amd64] https://packages.microsoft.com/repos/vscode stable main" > /etc/apt/sources.list.d/vscode.list'
  sudo apt-get update
  sudo apt-get install code

• reboot and launch with

  code

• install git for code

  sudo apt-get install git

• Ubuntu software can be buggy and server connection may be slow;
• apt-get command way of install App can be stable and you can see exactly what is going on

Install Git

• command

  sudo apt-get install git

• git usage example, get a clone copy of a github folder

  git clone https://github.com/ninja-ide/ninja-ide

Install KDE or MATE desktop environment

• KDE desktop environment installation, instead of default GNOME

  sudo apt-get install kubuntu-desktop

• MATE desktop environment (17.10) and choose lightdm as display manager

  sudo apt install -y ubuntu-mate-desktop

  • ref: https://www.hiroom2.com/2017/11/23/ubuntu-1710-mate-en/

• full graphic guide on Linux directory hierarchy: https://www.blackmoreops.com/2015/02/14/linux-file-system-hierarchy/
  

• other than your Home folder /home/your_name/ (~), you may want to put thing in a custom folder, like D:/ drive in your windows system,
• As you know, Linux / root directory is like your C:/ drive, all system folders are there and not for your to change (aka Filesystem Hierarchy Standard (FHS) for linux)
  • those system folders are very short-named for faster typing on old slow computers 40 years ago
  • ref: http://tldp.org/LDP/Linux-Filesystem-Hierarchy/html/

• command

  sudo mkdir /d
  sudo chmod 777 /d

• ref: https://itsfoss.com/apt-vs-apt-get-difference/

• screenshot cmd for a selection area (auto saved at ~/Picture folder)

  gnome-screenshot -a

• ref:
  • https://help.gnome.org/users/gnome-help/stable/screen-shot-record.html
  • https://askubuntu.com/questions/114429/default-save-directory-for-gnome-screenshot

• install f3write and f3read tool by type: sudo apt-install f3
• test write and read on flash mount directory

  f3write /media/username/flash_drive_label_name
  # after done, 
  f3read /media/username/flash_drive_label_name

• list device name and mount point

  lsblk

• list mount point

  mount

• check device plugin notice

  dmesg

1. check sum for verify file corrupt

   sha256sum linux_os_disk.iso

2. then search online for verify the sum code is same as online provided one
3. umount usb

   umount /dev/sdb1_like_part_name_for_usb

4. write

   dd if=linux_os_disk.iso of=/dev/sdb_like_device_Disk_name_check_above

   • if you got error when boot that finished usb like “isolinux.bin missing or corrupt”, means you had dd into its partition with a number instead of sdb_name_like device. use lsblk again to see the name for the DISK or PART

• Problem Analysis:
  • Software Updater (apt manager) is daily update at startup and lock apt.
• Solution A:
  • change Software Updater (search in Ubuntu app manager) > Launch > Setting > Update tab > change to 2 weeks for every checking
    
• Solution B:
  • code to change it

    sudo systemctl mask apt-daily.service
    sudo systemctl mask apt-daily.timer
    sudo systemctl mask apt-daily-upgrade.service
    sudo systemctl mask apt-daily-upgrade.timer