Shulou(Shulou.com)06/02 Report--

I. the relationship between program and process

1. Program: statically saved code

Executable code and data stored in media such as hard drives, CDs, etc.

2. Process: program code running in CPU and memory

Dynamically executed code

Parent-child process

Each process can create one or more processes

3. Threads: a process contains multiple threads

A process is a collection of threads

2. View process information 1. Ps command (1) ps aux static view

% MEM: percentage of memory

VSZ: amount of virtual memory consumed

RSS: the amount of resident memory occupied

TTY terminal

STAT process status

S: interruptible hibernation process

D: uninterruptible hibernation process

S: parent process

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