1.Linux history

(1) The Unix operating system was born in 1969 and was invented by Ken Thompson (Ken Thompson) and Dennis Ritchie (Dennis Ritchie) of Bell Labs in the United States.

(2) 1972 C Speech birth, because UNIX before using assembly language written, data migration difficult, so 1973 years Unix with C language rewrite success.

(3) In 1991, the Linux system was released, and Http://www.gnu.org;GNU was publicly launched by Richard Stallman, a fully free and free operating system;

Linus launched the kernel, www.kernel.org.

(4) Some hardware instructions:

2 CPUs have a noun: two-way technology, the CPU consumes the most power, the CPU radiator above the copper plate more heat dissipation better. The operating frequency of the CPU is generally compatible with the operating frequency of the memory.

DDR4 than DDR3, high performance, fast operation in unit time. Server generally with RDIMM, with registers, and UDIMM General home, no buffering, does not support the maximum memory capacity.

The real SAS disk: 300g,600g,900g, the others are pseudo-SAS disks. Select hard disk generally look at the speed, interface rate, capacity.

1.Linux history