[SR-Users] how to print log message in kamailio.log

my kamailio.log file print this but i want to print user registration please help me what i need do /usr/local/sbin/kamailio[25086]:INFO:<core>[main.c:798]:sig_usr():Signal 15 received /usr/local/sbin/kamailio[15085]:INFO:<core>[main.c:798]:sig_usr():Signal 15 received /usr/local/sbin/kamailio[15079]:INFO:<core>[sctp_core.c:53]:sctp_core_destroy():SCTP API not initialized /usr/local/sbin/kamailio[15079]:INFO:<core>[sctp_core.c:75]:sctp_core_check_support():SCTP API not enabled-if you want to use it load sctp module /usr/local/sbin/kamailio[23190]:INFO:rr[../outbound/api.h:54]:ob_load_api():failed to import bind_ob /usr/local/sbin/kamailio[23190]:INFO:rr[rr-mod.c:174]:mod_init():outbound module not available /usr/local/sbin/kamailio[23190]:INFO:usrloc[hslot.c:51]:ul_init_locks():locks aaray size 1024 /usr/local/sbin/kamailio[23190]:INFO:<core>[udp_server.c:150]:probe_max_receive_buffer():SO_RCVBUF is initially 163840 /usr/local/sbin/kamailio[23190]:INFO:<core>[udp_server.c:150]:probe_max_receive_buffer():SO_RCVBUF is finally 327680 /usr/local/sbin/kamailio[23198]:INFO:ctl[io_listener.c:210]:io_listen_loop():io_listen_loop:using epoll_lt as the io watch method (auto detected)