what ppid

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!What a computer can actually do is essentially very simple, such as calculating the number of two numbers, and then finding an address in memory,

#!/usr/bin/env pythonimport shlexfrom subprocess import popen,pipedef get_ps (): cmd =  ' Ps ax -o pid,ppid,cmd ' P = popen (shlex.split (cmd), Stdout=PIPE) return  p.stdout.readlines () [1:]def split (s): S = s.split () return s[0],s[1], ". Join (s[

The meaning of fork The following figure is the storage space layout of the C program (typical) 1. An existing process can invoke the fork function to create a new process.The 2.fork function is called once, but returns two times, and the only

The PS command in Linux is the abbreviation for process status. The PS command is used to list those processes that are currently running on the system. The PS command lists the current snapshots of those processes, which are those that are

What a computer can actually do is essentially very simple, such as calculating the number of two numbers, and then finding an address in memory, among other things. These most basic computer actions are called Instructions (instruction). The

---restore content starts---What is a program (process)Under Linux all the commands and actions you can do are related to permissions, and the system depends on the uid/gid and the attributes of the file to determine your permissions! In the Linux

Linux Ops shared root account permissions Audithttp://mp.weixin.qq.com/s?__biz=MzA3OTgyMDcwNg==&mid=2650626177&idx=1&sn= 8269a9debb9da7bde1765bce284e8b6e&chksm=

First, the application scenarioIn small and medium enterprises, the company's different operations and maintenance personnel are basically the root account of the server login management, lack of account authority audit system. No problem OK, out of

The header file # include & lt; sys/types. h & gt; # include & lt; sys/wait. h & gt; define the function pid_twait (int * status); function description: wait () will temporarily stop the execution of the current process until a signal arrives or the

I have been living in a Linux environment for a long time, and gradually I have a sense of environmental protection. For example, we will write "Wukong" in the logon prompt. I told you not to litter. It is wrong to litter. Why did you throw the

  1. Process Groups, sessions, and Terminals (1). Each process belongs to a process group. A process group is a collection of one or more processes. Generally, it is associated with a group of jobs and can receive various signals from the same

POSIX requires multiple thread inside a process to share a PID,However, in Linux kernel, either process or thread, a task struct is assigned and a unique PID is assigned (the PID is actually the thread ID).In this way, to satisfy POSIX threading

Waitpid Waitpid (Waiting for the child process to break or end)Table header File#include #include Define function pid_t waitpid (pid_t pid,int * status,int options);Function descriptionWaitpid () will temporarily stop the execution of the current

Note that if the user's shell is/bin/sh, it needs to be modified to/bin/bash!! Usermod-s/bin/bash User NameKali Linux System corresponding configuration file is/ETC/BASH.BASHRC, different release version may be differentStep one: VI/ETC/BASHRC added

Vamei Source: Http://www.cnblogs.com/vamei Welcome reprint, Please also keep this statement. Thank you!Procedures and processesThe same program can be executed multiple times, each time in memory to open up a separate space to load, resulting in

One, the process replicates (or produces)The child processes obtained by using the fork function inherit the entire process's address space from the parent process, including: process context, process stack, memory information, open file descriptor,

grep commandPS commandThe PS command in Linux is the abbreviation for process status. The PS command is used to list those processes that are currently running on the system. The PS command lists the current snapshots of those processes, which are

What a computer can actually do is essentially very simple, such as calculating the number of two numbers, and then finding an address in memory, among other things. These most basic computer actions are called Instructions (instruction). The

1. What is a process? A process is a running instance of an executable program that has been started, and the process has the following components:? (1) The address space of the allocated memory;? (2) Security attributes, including ownership

Recently, several servers were found to have zombie processes (). Run the following command to find out the zombie process ps-A-ostat, ppid, pid, cmd | grep-e '^ [Zz]' command annotation: -parameter A lists all process-o custom output fields. we set