Could not reliably determine the server's fully qualified domain name

I was following this tutorial to setup two virtual hosts in Centos 7. The issue is i am getting the following error while restarting the httpd. [userme@server ~]$ sudo systemctl restart httpd.service [sudo] password for userme: Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details. My configurations are [userme@server ~]$ cat /etc/hosts 127.0.0.1 server.workstation.com server 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 [userme@server ~]$ hostname server.workstation.com [userme@server ~]$ cat /etc/sysconfig/network # Created by anaconda NETWORKING=yes HOSTNAME=server [userme@server ~]$ cat /etc/resolv.conf # Generated by NetworkManager search workstation.com nameserver fe80::1%p3p1 nameserver 192.168.100.1 [userme@server ~]$ domainname (none) **EDIT As per request** [userme@server ~]$ systemctl status httpd -l ● httpd.service - The Apache HTTP Server Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled) Active: failed (Result: exit-code) since Thu 2018-01-18 12:55:25 +04; 57min ago Docs: man:httpd(8) man:apachectl(8) Process: 1285 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=1/FAILURE) Process: 1283 ExecStart=/usr/sbin/httpd $OPTIONS -DFOREGROUND (code=exited, status=1/FAILURE) Main PID: 1283 (code=exited, status=1/FAILURE) Jan 18 12:55:25 server.workstation.com systemd[1] : Starting The Apache HTTP Server... Jan 18 12:55:25 server.workstation.com httpd: AH00558: httpd: Could not reliably determine the server's fully qualified domain name, using server.workstation.com. Set the 'ServerName' directive globally to suppress this message Jan 18 12:55:25 server.workstation.com systemd[1] : httpd.service: main process exited, code=exited, status=1/FAILURE Jan 18 12:55:25 server.workstation.com kill: kill: cannot find process "" Jan 18 12:55:25 server.workstation.com systemd[1] : httpd.service: control process exited, code=exited status=1 Jan 18 12:55:25 server.workstation.com systemd[1] : Failed to start The Apache HTTP Server. Jan 18 12:55:25 server.workstation.com systemd[1] : Unit httpd.service entered failed state. Jan 18 12:55:25 server.workstation.com systemd[1] : httpd.service failed. [userme@server ~]$ sudo firewall-cmd --list-all public (active) target: default icmp-block-inversion: no interfaces: p3p1 sources: services: ssh dhcpv6-client ports: protocols: masquerade: no forward-ports: source-ports: icmp-blocks: rich rules: [userme@server ~]$ apachectl configtest Syntax OK What is the issue with my network/hostname settings ? Any help would be appreciated.