Linux "GNU", "GPL", "Linux system composition"

1, GNU, what is GNU,

GNU full name: GNU ' s not unix

GNU's important components (Emacs,gcc,bash,gawk, etc.), together with its own kernel, constitute the GNU own system---> useless

Now some of the important software in Linux is the GNU component and the kernel,

2. GPL

GPL Full name: general public License, the core of the GPL is to ensure that anyone has the freedom to share and modify free software, and that the Linux kernel adheres to the GPL but is not part of the GNU Project

3, the composition of Linux

Linux system composition: Linux kernel, GNU components, other necessary applications

• Installation method: CD-ROM boot, USB drive boot, network installation

• Why choose a 64-bit system? 32-bit and 64-bit differences:

① 32 bits are generally used by ordinary users, 64 bits are generally used in enterprises, research and other fields

② installation configuration, 64-bit can only be installed in 64-bit system, 32-bit can install 32-bit system can also be 64-bit system, 64-bit computer installed 32-bit system will cause performance waste

③ computing speed, 64-bit CPU data width is 64 bits, 32-bit CPU data width is 32 bits

④ addressing capabilities, 32-bit system memory usage is 4 g,64-bit system memory use larger, a large number of computing environments using 64-bit systems

Linux "GNU", "GPL", "Linux system composition"