1, CPU architecture
= = Desktop ========
- x86
- x64 (AMD64)
- POWERPC,PPC simple version of power
= = Mobile End ========
- The CPU of the mobile device is the ARM series. Arm is a designer that does not produce. Manufacturers have the Samsung ARM series, Qualcomm Arm series, Huawei's arm series and so on.
= = = Workstation ========
- Earlier UNIX-run mainframe CPUs were mainly produced by Motorola, m68000/m68k
- Earlier, the CPU architecture of the Sun workstation was SPARC (64-bit), now produced by Qualcomm, called UltraSPARC
- IBM's CPU is called power and is powerful
= = Other ==========
- HP's alpha, only run HP-UX
- Mips
2, cross-compiling
3,linux,bsd,aix ... : Unix-like. Unix-like systems are compatible with both APIs and ABI.
4, open Source agreement
- GPL: Copyright belongs to the GPL, so long as the software developed by the GPL software is referenced, the GPL agreement must be complied with. The Tai Chi end hinders the development of the GPL. So later appeared the Lgpl:lesser GPL, as long as no code, call library does not matter. But the development of the GPL has changed little.
- Then came the Bsd,apache: as long as not in the name of the original author propaganda on the line. Asf:apache software Foundation.
- Dual-line Licensing: Community Edition and Enterprise Edition
5, program Management
Binary program
Configuration file
Library files: two times development
Help file
The constituent files of the program are packaged into one or several limited files
Installation
Unloading
Inquire
- Debian Package Manager: dpkg (the corresponding package format is Deb), Front end package management tool: Apt-get
- Redhat Package Manager: RPM, front-end package management tool: Yum, upgrade to DNF now
- SuSE Package Manager: RPM, front-end package management tool: Zypper
- ArchLinux Package Manager: Port
- The main differences between the different Linux distributions are shown on the package manager
6, install Linux
- Virtualization software program: VMWare Workstation,virtualbox
- Take VMware as an example, the installation process main steps: 1, select Compatibility 2, choose to install Operating system 3 later, select the operating system Type 4, select the virtual machine name and storage location 5, select the number of CPUs, not greater than the physical CPU number 6, select the memory size, not greater than the physical memory size 7, select Bridged Network 8, select the IO controller type, the default is Line 9, select the disk type, the default is Line 10, create a new virtual disk 11, disk size 120G, do not tick allocate disk space immediately, otherwise it is not sparse format. 12, all the way next, the virtual machine is created. 13, you can then edit the virtual machine settings, add or remove some devices. The processor option has a "virtualized Intel Vt-x/ept or Amd-v/rvi (V)" for nested virtualization, which can be ticked. 14, install Linux, select CD/DVD, select Use ISO image file 15, click Start Client. 16, if the screen display is too large after installation, you can set the resolution 17 in the display options, note the use of the virtual machine snapshot function, similar to Ghost
- The CentOS Mirror site
- Http://mirrors.aliyun.com
- Http://mirrors.163.com
- Http://mirrors.sohu.com
The composition and initial knowledge of Linux system
