[root@c extra]# systemctl start httpd
Job for httpd.service failed because the control process exited with error code. See "systemctl status httpd.service" and "journalctl -xe" for details.
[root@c extra]# journalctl -xe
-- The leading process of the session is 8920.
Jun 28 08:28:37 c.training.com sshd[8920]: pam_unix(sshd:session): session opened for user root by (uid=0)
Jun 28 08:36:24 c.training.com sshd[8946]: Invalid user applmgr from 40.124.4.131 port 45588
Jun 28 08:36:24 c.training.com sshd[8946]: input_userauth_request: invalid user applmgr [preauth]
Jun 28 08:36:24 c.training.com sshd[8946]: pam_unix(sshd:auth): check pass; user unknown
Jun 28 08:36:24 c.training.com sshd[8946]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=40.124.4.131
Jun 28 08:36:26 c.training.com sshd[8946]: Failed password for invalid user applmgr from 40.124.4.131 port 45588 ssh2
Jun 28 08:36:26 c.training.com sshd[8946]: Received disconnect from 40.124.4.131 port 45588:11: Normal Shutdown, Thank you for playing [preauth]
Jun 28 08:36:26 c.training.com sshd[8946]: Disconnected from 40.124.4.131 port 45588 [preauth]
Jun 28 08:46:53 c.training.com sshd[8950]: Invalid user gopher from 206.189.131.213 port 42762
Jun 28 08:46:53 c.training.com sshd[8950]: input_userauth_request: invalid user gopher [preauth]
Jun 28 08:46:53 c.training.com sshd[8950]: pam_unix(sshd:auth): check pass; user unknown
Jun 28 08:46:53 c.training.com sshd[8950]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=206.189.131.213
Jun 28 08:46:55 c.training.com sshd[8950]: Failed password for invalid user gopher from 206.189.131.213 port 42762 ssh2
Jun 28 08:46:55 c.training.com sshd[8950]: Received disconnect from 206.189.131.213 port 42762:11: Normal Shutdown, Thank you for playing [preauth]
Jun 28 08:46:55 c.training.com sshd[8950]: Disconnected from 206.189.131.213 port 42762 [preauth]
Jun 28 08:59:29 c.training.com polkitd[1999]: Registered Authentication Agent for unix-process:9262:7794344 (system bus name :1.92 [/usr/bin/pkttyagent --notify-f
Jun 28 08:59:29 c.training.com systemd[1]: Starting The Apache HTTP Server...
-- Subject: Unit httpd.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has begun starting up.
Jun 28 08:59:29 c.training.com systemd[9268]: Failed at step EXEC spawning /usr/local/apache2/bin/apachectl: Permission denied
-- Subject: Process /usr/local/apache2/bin/apachectl could not be executed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- The process /usr/local/apache2/bin/apachectl could not be executed and failed.
--
-- The error number returned by this process is 13.
Jun 28 08:59:29 c.training.com systemd[1]: httpd.service: control process exited, code=exited status=203
Jun 28 08:59:29 c.training.com systemd[1]: Failed to start The Apache HTTP Server.
-- Subject: Unit httpd.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit httpd.service has failed.
--
-- The result is failed.
Jun 28 08:59:29 c.training.com systemd[1]: Unit httpd.service entered failed state.
Jun 28 08:59:29 c.training.com systemd[1]: httpd.service failed.
Jun 28 08:59:29 c.training.com polkitd[1999]: Unregistered Authentication Agent for unix-process:9262:7794344 (system bus name :1.92, object path /org/freedesktop

[root@c ~]# ll /usr/local/apache2/bin/apachectl
total 0
-rwxrwxrwx. 1 root root 0 Jun 27 10:17 test.txt

yum install httpd