Hello. I installed Syslog-NG on CentOS 7 x64 and my configuration is : @version:3.5 @include "scl.conf" # syslog-ng configuration file. # # This should behave pretty much like the original syslog on RedHat. But # it could be configured a lot smarter. # # See syslog-ng(8) and syslog-ng.conf(5) for more information. # # Note: it also sources additional configuration files (*.conf) # located in /etc/syslog-ng/conf.d/ options { flush_lines (0); time_reopen (10); log_fifo_size (1000); long_hostnames (off); use_dns (no); use_fqdn (no); create_dirs (no); keep_hostname (yes); ts_format(iso); encoding(UTF-8); }; source s_netsyslog { udp(ip(0.0.0.0) port(514) flags(no-hostname)); tcp(ip(0.0.0.0) port(514) flags(no-hostname)); }; destination d_netsyslog { file("/var/log/network.log" owner("root") group("root") perm(0644)); }; destination d_separatedbyhosts{file("/var/log/$HOST/messages" owner("root") group("root") perm(0655) dir_perm(0755) create_dirs(yes)); }; log { source(s_netsyslog); destination(d_separatedbyhosts); }; # Source additional configuration files (.conf extension only) @include "/etc/syslog-ng/conf.d/*.conf" # vim:ft=syslog-ng:ai:si:ts=4:sw=4:et: But my Syslog-NG can't start and give me below error: # systemctl status syslog-ng.service ● syslog-ng.service - System Logger Daemon Loaded: loaded (/usr/lib/systemd/system/syslog-ng.service; enabled; vendor preset: enabled) Active: failed (Result: start-limit) since Mon 2017-06-19 05:33:42 EDT; 32s ago Docs: man:syslog-ng(8) Process: 20920 ExecStart=/usr/sbin/syslog-ng -F -p /var/run/syslogd.pid (code=exited, status=1/FAILURE) Main PID: 20920 (code=exited, status=1/FAILURE) Status: "Starting up... (Mon Jun 19 05:33:41 2017" Jun 19 05:33:41 localhost.localdomain systemd[1]: Unit syslog-ng.service entered failed state. Jun 19 05:33:41 localhost.localdomain systemd[1]: syslog-ng.service failed. Jun 19 05:33:42 localhost.localdomain systemd[1]: syslog-ng.service holdoff time over, scheduling restart. Jun 19 05:33:42 localhost.localdomain systemd[1]: start request repeated too quickly for syslog-ng.service Jun 19 05:33:42 localhost.localdomain systemd[1]: Failed to start System Logger Daemon. Jun 19 05:33:42 localhost.localdomain systemd[1]: Unit syslog-ng.service entered failed state. Jun 19 05:33:42 localhost.localdomain systemd[1]: syslog-ng.service failed. Jun 19 05:33:42 localhost.localdomain systemd[1]: start request repeated too quickly for syslog-ng.service Jun 19 05:33:42 localhost.localdomain systemd[1]: Failed to start System Logger Daemon. Jun 19 05:33:42 localhost.localdomain systemd[1]: syslog-ng.service failed. How can I solve it? Thank you.