6
votes
3answers
239 views

Same IP on many systems in different environments

I work in an environment where there are multiple locations, and in each locations we have the same IP addressing scheme, that is, we have many machines (one in each location) that share the same IP ...
0
votes
2answers
232 views

Error message: Host 'server1.MY_DOMAIN.TLD' is not allowed to connect to this MySQL server

I have a web and mail server running Ubuntu 12.04. I installed iRedMail and had it running fine, but this morning mail was not connecting and none of my sites worked. I checked some logs which told me ...
-2
votes
1answer
44 views

Connecting to Gest ip address usign host alias [closed]

I have RedHat OS running on VMWare Player. My host operating system is windows7. Network configuration i am using on my virtual machine is NAT. I have configured my Guest operating systems ...
0
votes
2answers
132 views

Effects of mis-configured hosts file?

SSH and sudo were starting very slowly because /etc/hostname and /etc/hosts did not match. After adding a line for the hostname in the hosts file, the initial 2-4 second delay no longer occurs. At ...
2
votes
1answer
123 views

Does not having FQDN in /etc/hosts cause any problems?

Just been looking through some servers and seen that the external ip is set up with the full and short names the wrong way round, e.g.: a.b.c.d myserver myserver.mycompany.org What sort of problems ...
0
votes
1answer
123 views

hostname and hostname -f are backwards?

When I run the command hostname (on Ubuntu 10.04 LTS Server) it returns 'mail.mydomain.com' When I run hostname -f I get 'mail' as a response. These seem backwards to me, shouldn't hostname -f ...
0
votes
4answers
4k views

hostname -f says “hostname: the specified hostname is invalid”. Guess why?

hostname -f says "hostname: the specified hostname is invalid". The hostname (FQDN) specified in /etc/hostname is also listed in /etc/hosts and is pingable. No actual DNS server yet of the host knows. ...
0
votes
2answers
526 views

Is a matching entry in /etc/hosts required for hostname?

I was installing a Tomcat webapp that refused to work until I stumbled on someone else's issue with an unrelated product. The solution was to add the machine's name to /etc/hosts, to match the name ...
8
votes
2answers
8k views

/etc/hosts , /etc/sysconfig/network and hostname?

I need to do the hostname changes on a centos server which will serve www.myserver.com What do I need to do in /etc/hosts, /etc/sysconfig/network and with the hostname command? In ...
2
votes
2answers
2k views

Redhat doesn't set my desired hostname on reboot

I have a redhat (EL5) server that I need to change the hostname on. I'm trying to put it back into a known state to help with server provisioning activities. As part of changing the hostname, I'm ...
6
votes
1answer
12k views

“My unqualified host name (foo.bar) unknown” Problem

When trying to start sendmail or send a mail using a wordpress plugin, this error shows up in the maillog: "My unqualified host name (foo.bar) unknown; sleeping for retry" After Googling the best ...