I wonder what can cause these weird error log entries? The log entries indicate
a PID which doesn’t exist. Does nginx launch some temporary process when it
starts?
Nginx 1.21.0 on Ubuntu 20.04.
root@k2:~# systemctl restart nginx
root@k2:~# tail /var/log/nginx/error.log
2021/06/08 21:25:32 [warn] 1287733#1287733: the "user" directive makes sense
only if the master process runs with super-user privileges, ignored in
/etc/nginx/nginx.conf:21
2021/06/08 21:25:32 [emerg] 1287733#1287733: cannot load certificate key
"/etc/ssl/private/nginx-selfsigned.key": BIO_new_file() failed (SSL:
error:0200100D:system library:fopen:Permission
denied:fopen('/etc/ssl/private/nginx-selfsigned.key','r') error:2006D002:BIO
routines:BIO_new_file:system lib)
root@k2:~# ls -lh /etc/ssl/private/ |grep selfsigned
-rw-r----- 1 root ssl-cert 1.7K Jul 8 17:12 nginx-selfsigned.key
root@k2:~# cat /etc/nginx/nginx.conf |grep ^user
user www-data;
root@k2:~# ps -auxw |grep nginx
root 1287600 0.0 0.0 56148 6504 ? Ss 21:25 0:00 nginx:
master process /usr/sbin/nginx -c /etc/nginx/nginx.conf
www-data 1287601 0.7 0.1 58544 15652 ? S 21:25 0:05 nginx:
worker process
www-data 1287602 0.0 0.1 57556 13696 ? S 21:25 0:00 nginx:
worker process
www-data 1287603 0.0 0.1 56392 9184 ? S 21:25 0:00 nginx: cache
manager process
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