ERROR --> Cron <root@[my domain name]> test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )

[coryrobinson42]

I'm receiving an email every day with the following:

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/etc/cron.daily/logrotate:
error: nginx:8 unknown user 'nginx'
error: found error in /var/log/nginx/*log /var/log/nginx/domains/*log , skipping

I looked in the error.log and it showed a rejected connection from an IP in china that's known for port scanning.. I deleted the log and created a new log. The error.log is now empty but I still receive this email.

[skamasle]

Have you nginx installed ?

If yes, is there a nginx user ?

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grep nginx /etc/passwd

You can edit logrotate or crond.daily or create a nginx user.

[coryrobinson42]

Nginx is installed and running without any issues.

There is no nginx user in /etc/passwd. After I create a user 'nginx' what should I set the password to and where do I define this password?

[skamasle]

You dont need a password, you need create user whit nologin

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useradd -M nginx

Edited*****
On centos, in debian /sbin/login may vary.

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usermod -s /sbin/nologin nginx

You can read man pagefor more information

** I edit comand to do nologin shell.