pmbok 5 process groups

In Unix-like systems, users typically deal with a variety of related processes. Although there is only one terminal process (the user's login shell , which launches various programs and services through the shell) at login time, many related processes are usually generated shortly thereafter, such as the following: Run non-interactive programs in the background (for example, "" in the Bash command) Switch between various interactive proce

Deep understanding of daemon processes from the concept of process groups, sessions, and endpoints First, write in front"Daemon" is a long-running background service process of Linux, and some people call it "daemon process". Our common httpd, named, sshd and other services are run in the daemon Daemon way, usuall

session can be divided into a foreground process group and one or more background process groups. Therefore, a session should include the control process (session first process), a foreground process group, and any background

The terminal issues involve several concepts, including process groups, sessions, and jobs. The following sections describe them respectively. A session contains a series of processes. These processes are organized into several process groups according to different execution content. All processes in a session must be

The failover processing process bitsCN.com after the master database of db0101 is down in 48 nodes groups online Failover processing after 48 nodes in the online group and db0101 master database are down When a call is received, db0101 is Down and an error is reported: (1) Error 500,503,504 Error on the application page (2) email alert db0201 is down now! 1. Initial Determination of symptoms Ping ipv222

Linux Process understanding and practice (5) discuss the daemon process1. daemon process and Its FeaturesThe most important feature of a daemon is that it runs in the background. At this point, the TSR of the resident memory program under DOS is similar. Second, the daemon must be isolated from the environment before running. These environments include unclosed f

OverviewDaemons are processes that need to run in the background for a long period of time and are not controlled by the terminal, normally the daemon runs automatically at system startup, shuts down automatically when the server shuts down, and the daemon name usually ends with D, such as sshd, xinetd, Crond, ATD, and so on. Daemon Programming rules Call Umask to set the file mode creation mask to a known value (usually 0)Call fork () to create a new proce