zcyong@Ubuntu22:~$ cd ~
zcyong@Ubuntu22:~$ mkdir pico
zcyong@Ubuntu22:~$ cd pico
zcyong@Ubuntu22:~/pico$ git clone -b master https://github.com/raspberrypi/pico-sdk.git
zcyong@Ubuntu22:~/pico$ cd pico-sdk/
zcyong@Ubuntu22:~/pico/pico-sdk$ git submodule update --init
zcyong@Ubuntu22:~/pico/pico-sdk$ cd ..
zcyong@Ubuntu22:~/pico$ git clone -b master https://github.com/raspberrypi/pico-examples.git
zcyong@Ubuntu22:~/pico$ git clone -b master https://github.com/raspberrypi/pico-project-generator.git
zcyong@Ubuntu22:~/pico$ echo "export PICO_SDK_PATH=h/home/zcyong/pico/pico-sdk" >> .bashrc
zcyong@Ubuntu22:~/pico$ sudo apt install gcc-arm-none-eabi libnewlib-arm-none-eabi build-essential