$ sudo apt update
$ sudo apt upgrade
$ sudo apt install build-essential
$ sudo apt-get update
$ sudo apt-get upgrade
$ sudo apt-get install build-essential
$ whereis gcc make
$ gcc --version
$ make -v
$ sudo apt-get install manpages-dev man-db manpages-posix-dev
$ man 3 scanf
$ man 2 execve
$ man 2 fork
$ vi test.cpp
$ make test
$ g++ test.cpp -o test
$ ls -l test
$ ./test
$ sudo apt install libx11-dev
sudo apt-get install build-essential
g++ -o swap example.cpp
./example
sudo apt-get install eclipse