Monitor last lines of messages file journalctl --no-hostname --follow --boot Output log in a colored fashion grc journalctl --no-hostname --follow --boot Monitor last lines of Linux Kernel log journalctl --no-hostname --boot --follow --dmesg Monitor last lines of PPPoE log journalctl --no-hostname --boot --follow --unit "ppp@pppoe*.service" Monitor last lines of PPPoE log for specific interface journalctl --no-hostname --boot --follow --unit "ppp@$6.service" Monitor log for Routing Protocols Monitor log for OSPF journalctl --follow --no-hostname --boot /usr/lib/frr/ospfd Monitor log for OSPF for IPv6 journalctl --follow --no-hostname --boot /usr/lib/frr/ospf6d Monitor log for BGP journalctl --follow --no-hostname --boot /usr/lib/frr/bgpd Monitor log for RIP journalctl --follow --no-hostname --boot /usr/lib/frr/ripd Monitor log for RIPng journalctl --follow --no-hostname --boot /usr/lib/frr/ripngd Monitor log for static route journalctl --follow --no-hostname --boot /usr/lib/frr/staticd Monitor log for Multicast protocol journalctl --follow --no-hostname --boot /usr/lib/frr/pimd Monitor log for ISIS journalctl --follow --no-hostname --boot /usr/lib/frr/isisd Monitor log for NHRP journalctl --follow --no-hostname --boot /usr/lib/frr/nhrpd Monitor log for BFD journalctl --follow --no-hostname --boot /usr/lib/frr/bfdd Monitor log for MPLS journalctl --follow --no-hostname --boot /usr/lib/frr/ldpd