CentOS 7.x Setup Custom boot, add custom system service

Centos System Services Script directory:

1. /usr/lib/systemd/

System and users (user),

If you need to boot the program can be run without logging in, there is system services (systems), that is:

1. /lib/systemd/system/  

Conversely, the user login to run the program, the presence of users (user)

1  /lib/systemd/system equals/usr/lib/systemd/system2 /lib/systemd/user       equals/usr/lib/systemd/user

The service ends with a. Service.

This is an example of an nginx boot operation.

1. Create a service file

　　　

1 cd/lib/systemd/system/2 cp-p tuned.service httpd. Service 3 Vim Httpd.service

1 [Unit]2description=Apache Httpd Serveice3After=httpdlog.Target4 5 [Service]6Type=forking7execstart=/usr/local/apache2/bin/apachectl Start8execreload=/usr/local/apache2/bin/apachectl Restart9execstop=/usr/local/apache2/bin/Apachectl StopTenprivatetmp=true One  A [Install] -Wantedby=multi-user.Target -~

[Unit]: Description of the service

Description: Description Service
After: Describe the service category

settings for the [service] service run parameter

Type=forking is the form of a background run
Execstart specific run commands for the service
Execreload Reset Command
Execstop for Stop command
Privatetmp=true represents a separate temporary space allocated to the service
Note: The start, restart, and stop commands for [Service] all require absolute paths

Settings for the [Install] service installation, which can be set to multi-user

2. Save the Directory

Save in Directory with 754 permissions:

1. /lib/systemd/system

3. Set up boot from boot

1. Systemctl Enable Nginx.service

4. Other commands

 

Tasks	old directives	new directives
enable a service to start automatically	chkconfi G--level 3 httpd  on	systemctl enable Httpd.service
cause a service not to start automatically	chkconfig--level 3 httpd off	systemctl disable Httpd.service
Check service status	services httpd status	systemctl status httpd.service (service details)   Sys Temctl is-active Httpd.service (show only active)
Show All services started	chkconfig--list	sy Stemctl list-units--type=service
start a service	service httpd start	systemctl start Httpd.service
Stop a service	service httpd stop	systemctl stop Httpd.service
Restart a service	service httpd restart	systemctl restart Httpd.service

Start Nginx Service

Systemctl Start Nginx.service

Set up boot from

Systemctl Enable Nginx.service

Stop Boot from booting

Systemctl Disable Nginx.service

View the current status of the service

Systemctl Status Nginx.service

Restart Service

Systemctl Restart Nginx.service

View all services that have been started

Systemctl list-units--type=service

CentOS 7.x Setup Custom boot, add custom system service