Summary of linux Processes

Summary of linux processes-general Linux technology-Linux programming and kernel information. The following is a detailed description. Process concept: A process is a running instance, which is the basic scheduling unit of linux. A process consists of the following elements:

1. Current context of the program and current execution status of the program

2. Current execution directory of the program

3. The current directory and file accessed by the program

4. Program Trust status

5. Memory and other system resources allocated to the Process

The kernel uses processes to control the access to cpu and other system resources, and uses processes to determine the program running on the cpu, how long it will run, and how well it will run with such features. The kernel scheduler allocates cpu time in multiple process parts, called time slices. He takes turns to get control of each process after the time slice is used up.

The most important feature of a process is the process number and the parent process number. The ancestor of all processes is the process init with process number 1. Init guides the system, starts the daemon process and runs necessary processes.