LinuxQuestions.org - setting up my hostname

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setting up my hostname

1). How to setup a host name? as I know a host name can be anything u make up, but what about the domain name, can I pick any domain name i want as well?
2). Do I have to associate my ip with the hostname under the HOST tab in network config? If I do, what should I put in the alias field?
3). if all of the above has been done correctly, would there be any problem accessing to my computer from a remote host by ssh? or I need to config something else?

I know these may sound stupid, but I really need someone to help me on this.

I am using redhat 7.2, thx

set the hostname in /etc/hosts. if u are running a local DNS server, u can set up any domain name you want. that way, u can do 'host based' resolution within your network.

if you only do the hostname assignment via /etc/hosts, remote machines won't know it. u need to set the hostname with the corresponding IP address to other machine's hosts file.

Here is an example: say my hostname is "nyteshyft", and the domain name that i am associated with is called "nyteshyft.org", and that my IP address is "128.1.1.2".

Code:

edit /etc/sysconfig/network, modify the following entries:

hostname = "nyteshyft"

domainname = "nyteshyft.org"

Restart your machine. Test your hostname and domainname:

Code:

# hostname

nyteshyft



# hostname --fqdn

nyteshyft.nyteshyft.org





# dnsdomainname

nyteshyft.org

Keep all your most used host names and IP addresses in /etc/hosts

Code:

127.0.0.1          localhost.localdomain.com          localhost

128.1.1.2          nyteshyft.nyteshyft.org              nyteshyft

Configure the DNS using /etc/resolv.conf

Code:

search nyteshyft.org

nameserver 0.0.0.0

You can configure the order of the nameservers too with /etc/nsswitch.conf (everything else is unchanged)

Code:

hosts: dns files

i hope thats all right, worked for me, my friend told me some of it though, pretty easy once you know it :)

everything i clear, except the part that to configure etc/resolv.conf and etc/nsswitch.conf, what are they doing? what would be the ip of the nameserver?
In etc/nsswitch.conf, I just type in "hosts: dns files", or i have to fill in other information, can u make a concrete example?
also what does the localhost thing do, i read some web page and it says that local host is for some special use.