I haven't been following this email chain, but I see that you asked: > Is there any way to tell that the hostname has been set via > > hostname some.random.address > > rather via some init script reading /etc/sysconfig/network? > To satisfy my own curiosity I looked on an SL6.7 computer for how hostname gets set. In /etc/init.d/network, which brings networking up and down, are lines cd /etc/sysconfig/network-scripts . ./network-functions and calls to ifup. The ifup script can invoke ifup-eth (in network-scripts), which can invoke ifup-post, which can do 'set_hostname $HOSTNAME', where set_hostname is one of the functions in the above mentioned network-functions. That function does 'hostname $1'. So ultimately the scripts that bring the network up apparently do the same thing as you would do by hand to set the hostname. With your current scripts I don't see how you can tell whether the init scripts set the hostname or a human did it. But you could save the current ifup-post just in case you want to restore it, and replace it with a version that calls net_log, also in network-functions, whenever ifup-post invokes set_hostname. For example, on SL6 I think it would work if just before the ifup-post line calling set_hostname you add a line net_log "Call set_hostname with hostname ${HOSTNAME}." info Later you can compare the resulting line in /var/log/messages to what the hostname currently is. Steven Yellin On Thu, 17 Mar 2016, Loris Bennett wrote: > Brandon Vincent <[log in to unmask]> writes: > >> On Mar 16, 2016 7:56 AM, "Loris Bennett" >> <[log in to unmask]> wrote: >>> >>> Brandon Vincent <[log in to unmask]> writes: >>> >>>> On Mar 15, 2016 3:44 AM, "Loris Bennett" >>>> <[log in to unmask]> wrote: >>>>> What other files could have an influence on what 'hostname' returns? >>>> >>>> Could you post the output of >>>> >>>> getent hosts [hostname] and getent hosts [ip] for both systems? >>>> >>>> Also please post the hosts line from nsswitch.conf from both machines. >>>> >>>> Brandon Vincent >>>> >>> >>> [root@tadmin01 ~]# getent hosts tadmin01 >>> 10.141.235.254 tadmin01.test.cluster tadmin01 >>> [root@tadmin01 ~]# getent hosts 10.141.235.254 >>> 10.141.235.254 tadmin01.test.cluster tadmin01 >>> >>> [root@tadmin02 ~]# getent hosts tadmin02 >>> 10.141.235.253 tadmin02.test.cluster tadmin02 >>> [root@tadmin02 ~]# getent hosts 10.141.235.253 >>> 10.141.235.253 tadmin02.test.cluster tadmin02 >>> >>> [root@tadmin01 ~]# grep hosts /etc/nsswitch.conf >>> #hosts: db files nisplus nis dns >>> hosts: files dns >>> >>> [root@tadmin02 ~]# grep hosts /etc/nsswitch.conf >>> #hosts: db files nisplus nis dns >>> hosts: files dns >>> >>> Cheers, >>> >>> Loris >>> >>> -- >>> Dr. Loris Bennett (Mr.) >>> ZEDAT, Freie Universität Berlin Email [log in to unmask] >> >> Looks good. Verify there is no /etc/hostname on the system (or if there is, >> ensure the contents are correct. >> >> Are you using NetworkManager or the traditional network service? >> >> These IPs are static, right? Not assigned by DHCP but entered manually. >> >> Brandon Vincent > > OK, sorry for wasting everyone's time. I rebooted tadmin02 and now I > get > > [root@tadmin02 ~]# hostname > tadmin02 > > as expected. I assume I must have done > > hostname tadmin.test.cluster > > at some point. Which begs the question: > > Is there any way to tell that the hostname has been set via > > hostname some.random.address > > rather via some init script reading /etc/sysconfig/network? > > Thanks for all the help, > > Loris > > -- > This signature is currently under construction. >