The syslog dæmon responds to certain signals. Again, we won't document them all here; see the man pages for full details.
SIGHUP: this is the one you are likely to use the most. Send the SIGHUP signal to the running syslogd process to cause it to re-initialize. You can use this to make any changes to /etc/syslog.conf take effect without actually killing and restarting the syslogd process.
SIGTERM: kills the dæmon.
SIGINT, SIGQUIT: if in debug mode, these signals are ignored; otherwise, the dæmon exits.