Linux Service and Process Management with Nginx

Linux service and process management tutorial covering installation, control, verification, and monitoring of the Nginx web server on a Linux system.

Linux Service Process Management

Service management

Process management

Preparation – Install Nginx Service

Install an Nginx web server (default port 80) for testing purposes.

yum -y install nginx

Service Management – systemctl

Use systemctl (or legacy service ) to control the Nginx service:

Start: systemctl start nginx

Stop: systemctl stop nginx

Restart: systemctl restart nginx

Reload: systemctl reload nginx

Status: systemctl status nginx

Enable at boot: systemctl enable nginx

Disable at boot: systemctl disable nginx

Service Verification

Check listening ports with netstat (TCP: -anlpt , UDP: -anlpu ).

[root@myserver ~]# netstat -anlpt | grep 80
tcp      0      0 0.0.0.0:80          0.0.0.0:*          LISTEN      6416/nginx: master
tcp6     0      0 :::80               :::*               LISTEN      6416/nginx: master

Process Management

View Nginx processes with ps :

[root@myserver ~]# ps aux | grep nginx
root       6416  0.0  0.5 118672  9920 ?   Ss   09:10   0:00 nginx: master process /usr/sbin/nginx
nginx      6447  0.0  0.4 150020  9000 ?   S    09:10   0:00 nginx: worker process
root       6635  0.0  0.0  12108  1088 pts/0 S+ 09:15   0:00 grep --color=auto nginx

Terminate processes using kill (graceful -15 , force -9 ) or killall to stop all Nginx processes:

kill PID
kill -9 123
kill -15 123
killall nginx   ## stop all nginx processes

Monitor system processes with top .

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