dpkg

dpkg is a package manager for Debian-based systems. It can install, remove, and build packages, but unlike other package management systems, it cannot automatically download and install packages or their dependencies.

sudo apt-get install build-essential

# list all packages installed on the system, from a terminal prompt type:
dpkg -l

# see all the files the package installed onto your system, do this:
dpkg-query -L <package_name>

# see the files a .deb file will install
dpkg-deb -c <package_name.deb>

GCC 8

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-8 g++-8
gcc-8 --version

# 默认使用 gcc-8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 800 --slave /usr/bin/g++ g++ /usr/bin/g++-8
sudo update-alternatives --remove-all gcc


sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-8 90 --slave /usr/bin/g++ g++ /usr/bin/g++-8
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 80 --slave /usr/bin/g++ g++ /usr/bin/g++-6
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-7 70 --slave /usr/bin/g++ g++ /usr/bin/g++-7


sudo update-alternatives --config gcc

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