Ubuntu Development Tools

Select a Package Mirror

Ubuntu package downloads may be slow on some networks. Use “Software & Updates” to select a suitable mirror.

Open the download-server selector from the Ubuntu Software page.

Select a stable mirror under China and confirm.

Refresh the package index:

sudo apt-get update

A full system upgrade is not required just to prepare an SDK build environment. Run it only when appropriate:

sudo apt-get upgrade

Repair dependencies when needed:

sudo apt-get -f install

Normal User and Root

Perform daily builds as a normal user and use sudo for administrative actions. Enabling root login is normally unnecessary.

To set a root password explicitly:

sudo passwd root

Basic Utilities

Install ifconfig:

sudo apt-get install -y net-tools

Install Vim:

sudo apt-get install -y vim

File Transfer Between Windows and Ubuntu

Install the SSH Server

sudo apt-get install -y openssh-server
sudo systemctl enable --now ssh
sudo systemctl status ssh

Use the normal Ubuntu account for SFTP. Root SSH login should remain disabled:

PermitRootLogin no

Restart SSH when required:

sudo service ssh restart

Display the VM IPv4 address:

ip -4 addr

After installing net-tools, ifconfig may also be used.

Use FileZilla

Install FileZilla Client on Windows.

Create an SFTP site:

Item	Value
Protocol	SFTP - SSH File Transfer Protocol
Host	Ubuntu VM IP address
Port	22
Logon type	Normal
User	Normal Ubuntu user
Password	Password for that user

After connecting, transfer files by dragging or double-clicking.