现在已经解决了sshd的一些问题，但是我已经发送了几个小时到凌晨4点，试图修复一些权限问题，最终弄乱了所有的所有权和权限。
MariaDB无法启动。
我已经在状态输出下方发布了 任何建议将不胜感激。我试图重新安装mysql，也许它会解决我的问题，但没有区别。
[root@sentora /]# systemctl status mariadb.service
* mariadb.service - MariaDB database server
Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Sat 2017-06-17 14:05:24 UTC; 7s ago
Process: 2039 ExecStartPre=/usr/libexec/mariadb-prepare-db-dir %n (code=exited, status=203/EXEC)
Apr 15 18:57:22 sentora mysqld_safe[188]: 170415 18:57:22 mysqld_safe mysqld restarted
Apr 17 00:29:02 sentora mysqld_safe[188]: /usr/bin/mysqld_safe: line 183: 12292 Killed ...ull
Apr 17 00:29:03 sentora mysqld_safe[188]: 170417 00:29:03 mysqld_safe Number of processes running now: 0
Apr 17 00:29:03 sentora mysqld_safe[188]: 170417 00:29:03 mysqld_safe mysqld restarted
Apr 17 00:29:09 sentora mysqld_safe[188]: /usr/bin/mysqld_safe: line 183: 22326 Killed ...ull
Apr 17 00:29:09 sentora mysqld_safe[188]: 170417 00:29:09 mysqld_safe Number of processes running now: 0
Apr 17 00:29:10 sentora mysqld_safe[188]: 170417 00:29:09 mysqld_safe mysqld restarted
Apr 17 00:29:15 sentora mysqld_safe[188]: /usr/bin/mysqld_safe: line 183: 22382 Killed ...ull
Apr 17 00:29:16 sentora mysqld_safe[188]: 170417 00:29:16 mysqld_safe Number of processes running now: 0
Apr 17 00:29:16 sentora mysqld_safe[188]: 170417 00:29:16 mysqld_safe mysqld restarted
Jun 15 08:19:10 sentora systemd[1]: Stopping MariaDB database server...
Jun 15 08:24:10 sentora systemd[1]: mariadb.service stop-sigterm timed out. Killing.
Jun 15 08:24:10 sentora systemd[1]: mariadb.service: main process exited, code=killed, status=9/KILL
Jun 15 08:24:10 sentora systemd[1]: Stopped MariaDB database server.
Jun 15 08:24:10 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 15 08:24:10 sentora systemd[1]: mariadb.service failed.
Jun 15 23:31:36 sentora systemd[1]: Starting MariaDB database server...
Jun 15 23:31:36 sentora mariadb-prepare-db-dir[1192]: touch: cannot touch '/var/log/mariadb/mariadb...ed
Jun 15 23:31:36 sentora mariadb-prepare-db-dir[1192]: chown: cannot access '/var/log/mariadb/mariad...ed
Jun 15 23:31:36 sentora mariadb-prepare-db-dir[1192]: chmod: cannot access '/var/log/mariadb/mariad...ed
Jun 15 23:31:36 sentora mysqld_safe[1220]: 170615 23:31:36 mysqld_safe Logging to '/var/log/maria...og'.
Jun 15 23:31:36 sentora mysqld_safe[1220]: touch: cannot touch '/var/log/mariadb/mariadb.log': Pe...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: chmod: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: 170615 23:31:36 mysqld_safe Starting mysqld daemon wit...ysql
Jun 15 23:31:36 sentora mysqld_safe[1220]: /usr/bin/mysqld_safe: line 139: /var/log/mariadb/maria...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: /usr/bin/mysqld_safe: line 183: /var/log/mariadb/maria...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: touch: cannot touch '/var/log/mariadb/mariadb.log': Pe...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: chown: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:31:36 sentora mysqld_safe[1220]: chmod: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:31:36 sentora systemd[1]: mariadb.service: main process exited, code=exited, status=1/FAILURE
Jun 15 23:31:37 sentora systemd[1]: mariadb.service: control process exited, code=exited status=1
Jun 15 23:31:37 sentora systemd[1]: Failed to start MariaDB database server.
Jun 15 23:31:37 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 15 23:31:37 sentora systemd[1]: mariadb.service failed.
Jun 15 23:34:54 sentora systemd[1]: Starting MariaDB database server...
Jun 15 23:34:54 sentora mariadb-prepare-db-dir[1418]: touch: cannot touch '/var/log/mariadb/mariadb...ed
Jun 15 23:34:54 sentora mariadb-prepare-db-dir[1418]: chown: cannot access '/var/log/mariadb/mariad...ed
Jun 15 23:34:54 sentora mariadb-prepare-db-dir[1418]: chmod: cannot access '/var/log/mariadb/mariad...ed
Jun 15 23:34:54 sentora mysqld_safe[1446]: 170615 23:34:54 mysqld_safe Logging to '/var/log/maria...og'.
Jun 15 23:34:54 sentora mysqld_safe[1446]: touch: cannot touch '/var/log/mariadb/mariadb.log': Pe...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: chmod: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: 170615 23:34:54 mysqld_safe Starting mysqld daemon wit...ysql
Jun 15 23:34:54 sentora mysqld_safe[1446]: /usr/bin/mysqld_safe: line 139: /var/log/mariadb/maria...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: /usr/bin/mysqld_safe: line 183: /var/log/mariadb/maria...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: touch: cannot touch '/var/log/mariadb/mariadb.log': Pe...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: chown: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:34:54 sentora mysqld_safe[1446]: chmod: cannot access '/var/log/mariadb/mariadb.log': P...nied
Jun 15 23:34:54 sentora systemd[1]: mariadb.service: main process exited, code=exited, status=1/FAILURE
Jun 15 23:34:55 sentora systemd[1]: mariadb.service: control process exited, code=exited status=1
Jun 15 23:34:55 sentora systemd[1]: Failed to start MariaDB database server.
Jun 15 23:34:55 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 15 23:34:55 sentora systemd[1]: mariadb.service failed.
Jun 15 23:35:50 sentora systemd[1]: Starting MariaDB database server...
Jun 15 23:35:51 sentora mysqld_safe[1675]: 170615 23:35:51 mysqld_safe Logging to '/var/log/maria...og'.
Jun 15 23:35:51 sentora mysqld_safe[1675]: 170615 23:35:51 mysqld_safe Starting mysqld daemon wit...ysql
Jun 15 23:35:52 sentora systemd[1]: mariadb.service: control process exited, code=exited status=1
Jun 15 23:35:52 sentora systemd[1]: Failed to start MariaDB database server.
Jun 15 23:35:52 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 15 23:35:52 sentora systemd[1]: mariadb.service failed.
Jun 15 23:36:58 sentora systemd[1]: Starting MariaDB database server...
Jun 15 23:36:59 sentora mysqld_safe[1906]: 170615 23:36:59 mysqld_safe Logging to '/var/log/maria...og'.
Jun 15 23:36:59 sentora mysqld_safe[1906]: 170615 23:36:59 mysqld_safe Starting mysqld daemon wit...ysql
Jun 15 23:36:59 sentora mysqld_safe[1906]: 170615 23:36:59 mysqld_safe mysqld from pid file /var/...nded
Jun 15 23:36:59 sentora systemd[1]: mariadb.service: control process exited, code=exited status=1
Jun 15 23:37:00 sentora systemd[1]: Failed to start MariaDB database server.
Jun 15 23:37:00 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 15 23:37:00 sentora systemd[1]: mariadb.service failed.
Jun 15 23:41:43 sentora systemd[1]: Starting MariaDB database server...
Jun 15 23:41:43 sentora mysqld_safe[2144]: 170615 23:41:43 mysqld_safe Logging to '/var/log/maria...og'.
Jun 15 23:41:43 sentora mysqld_safe[2144]: 170615 23:41:43 mysqld_safe Starting mysqld daemon wit...ysql
Jun 15 23:41:46 sentora systemd[1]: Started MariaDB database server.
Jun 15 23:52:23 sentora systemd[1]: Stopping MariaDB database server...
Jun 15 23:52:24 sentora systemd[1]: Stopped MariaDB database server.
Jun 17 01:58:56 sentora systemd[1]: Stopping MariaDB database server...
Jun 17 01:58:57 sentora mysqld_safe[238]: /usr/bin/mysqld_safe: line 887: touch: command not found
Jun 17 01:58:57 sentora mysqld_safe[238]: /usr/bin/mysqld_safe: line 888: chown: command not found
Jun 17 01:58:57 sentora mysqld_safe[238]: /usr/bin/mysqld_safe: line 889: chmod: command not found
Jun 17 01:58:57 sentora mysqld_safe[238]: /usr/bin/mysqld_safe: line 892: date: command not found
Jun 17 01:58:57 sentora mysqld_safe[238]: /usr/bin/mysqld_safe: line 135: date: command not found
Jun 17 01:58:57 sentora systemd[1]: mariadb.service: main process exited, code=exited, status=1/FAILURE
Jun 17 01:58:57 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 17 01:58:57 sentora systemd[1]: mariadb.service failed.
Jun 17 01:58:57 sentora systemd[1]: Starting MariaDB database server...
Jun 17 01:58:57 sentora systemd[1]: mariadb.service: control process exited, code=exited status=203
Jun 17 01:58:57 sentora systemd[1]: Failed to start MariaDB database server.
Jun 17 01:58:57 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 17 01:58:57 sentora systemd[1]: mariadb.service failed.
Jun 17 02:04:20 sentora systemd[1]: Starting MariaDB database server...
Jun 17 02:04:20 sentora systemd[1]: mariadb.service: control process exited, code=exited status=203
Jun 17 02:04:20 sentora systemd[1]: Failed to start MariaDB database server.
Jun 17 02:04:20 sentora systemd[1]: Unit mariadb.service entered failed state.
Jun 17 02:04:20 sentora systemd[1]: mariadb.service failed.