CentOS 7.x Custom Boot settings

One: Overview

CentOS 7 inherits the new features of Rhel 7, such as the powerful systemctl, while the use of SYSTEMCTL has changed the way in which the previous system services/etc/init.d/startup scripts, and greatly improves the efficiency of system services. However, the configuration of services and the past has also undergone great differences.

CentOS 7 Service Systemctl script is stored in:/usr/lib/systemd/, the system and the user (users) of the points, such as the need to boot without logging on to run the program, or the existence of system services, that is:/usr/lib/ Systemd/system directory, and each service ends with a. Service.

Centos System Services Script directory:

/usr/lib/systemd

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

/usr/lib/systemd/system

2. Start configuration

2.1 Environmental ===>

1. Add self-starting service: UWSGI

2. Self-booting script to write well

3. I put the start-up script in the/etc/init.d/directory, and add the Execute permission

2.2 Configuring ===>

Each service ends with a. Service and is typically divided into 3 parts: [Unit], [service], and [Install], which I wrote to run the Uwsgi project with the following details:

[Email protected] ~]# cd/usr/lib/systemd/system[[email protected] system]# vim uwsgid.service[unit]description= Uwsgidafter=network.target[service]type=forkingexecstart=/etc/init.d/uwsgid StartExecReload=/etc/init.d/uwsgid Restartexecstop=/etc/init.d/uwsgid Stopprivatetmp=true [Install]wantedby=multi-user.target

The service script is saved in the/usr/lib/systemd/system directory with 754 permissions, as written above

[Email protected] system]# chmod 754 Uwsgid.service

The configuration file is interpreted as follows:

Description of the [Unit] ===> Service

Description: Description Service
After: Describe the service category

  [Service]         ===>       Settings for service run parameters

       type=forking: is the background run form
       execstart: Specific Run command for the service
        Execreload: Restart command
       privatetmp=true: Represents a separate temporary space for the service
< Span style= "Padding:0px;margin:0px;color:rgb (255,0,0);" >      Note: The start, restart, and stop commands for [Service] all require absolute path

[Install] ===> settings for the service installation, can be set to multi-user

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3. Set up boot from boot

Systemctl Enable Uwsgid.service

4. Other commands

Take the httpd service as an example

Task	Old instructions	New directives
Enable a service to start automatically	Chkconfig--level 3 httpd on	Systemctl Enable Httpd.service
Make a service not start automatically	Chkconfig--level 3 httpd off	Systemctl Disable Httpd.service
check service	service httpd status	systemctl status httpd.service           <== service details  systemctl is-active httpd.service  <==  Show only Active
Show all services that have been started	Chkconfig--list	Systemctl 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

Reference post: http://blog.csdn.net/yuanguozhengjust/article/details/38019923

Http://www.centoscn.com/CentOS/config/2015/0507/5374.html

This article is from the "Potato" blog, please be sure to keep this source http://zhaoyulin.blog.51cto.com/11665101/1871435

CentOS 7.x Custom Boot settings