CentOS7 custom boot item

CentOS7 custom boot item

Centos System Service Script directory:

/Usr/lib/systemd/

There are systems and users,

If you need to start a program that can run without logging on to the system, it exists in the system service, namely:

/Lib/systemd/system/

Otherwise, the program that can run only after the user logs on exists in the user

The service ends with. service.

The following uses nginx as an example.

1. Create a service file

Vim/lib/systemd/system/nginx. service

[Unit]

Description = nginx

Afterdomainnetwork.tar get

[Service]

Type = forking

ExecStart =/www/lanmps/init. d/nginxstart

ExecReload =/www/lanmps/init. d/nginxrestart

ExecStop =/www/lanmps/init. d/nginx stop

PrivateTmp = true

[Install]

Wantedbypolicmulti-user.tar get

[Unit]: Service Description

Description: describes the service.

After: Describes the service category.

[Service] Service running parameter settings

Type = forking is the form of background running

ExecStart is the specific running command of the service.

ExecReload is the restart command

ExecStop is the Stop command

PrivateTmp = True indicates that an independent temporary space is allocated to the service.

Note: the absolute path is required for the [Service] startup, restart, and stop commands.

[Install] service installation settings, which can be set to multiple users

2. Save the Directory

Save as 754 permissions in the directory:

/Lib/systemd/system

3. Set auto-start upon startup

Systemctl enable nginx. service

4. Other commands

New commands of old task commands

Enable a service to automatically start chkconfig -- level 3 httpd on systemctl enable httpd. service

Make a service not automatically start chkconfig -- level3 httpd off systemctldisable httpd. service

Check service status servicehttpd status systemctlstatus httpd. service (service details)

Systemctlis-active httpd. service (only show whether it is Active)

Show all started services chkconfig -- list systemctllist-units -- type = service

Start a service servicehttpd start systemctlstart httpd. service

Stop a service servicehttpd stop systemctlstop httpd. service

Restart a service servicehttpd restart systemctlrestart httpd. service

Start the nginx Service

Systemctl start nginx. service

Set auto-start

Systemctl enable nginx. service

Stop Auto-start

Systemctl disable nginx. service

View Current Service Status

Systemctl status nginx. service

Restart the service

Systemctl restart nginx. service

View all started services

Systemctl list-units -- type = service