welcome and notes
win + e ------> 文件浏览器
win + v -------> 剪切板
Most of the counter-based tools on Linux systems read statistics from the
/proc file system. /proc is a “pseudo” file system that exists only in kernel
memory and is used primarily for querying various per-process as well as
kernel statistics. The /p...
An operating system provides an environment for the execution of programs by providing services to users and programs.
The three primary approaches for interacting with an operating system are (1) command interpreters, (2) graphical user interfaces, ...
these needs resulted in the notion of a process, which is a program
in execution. A process is the unit of work in a modern computing system.
The status of the current activity of a process is represented by the value of the program counter and the c...