A question about hostname.

[hack3rcon]

Hello,
What is wrong about below configuration?

Code: Select all

$ hostname
mydomain.example

$ hostnamectl
	Static hostname: mydomain
	Transient hostname: mydomain.example
	Operating System: CentOS Linux 8 (Core)
	CPE OS Name: cpe:/o:centos:centos:8
        Kernel: Linux 4.18.0-193.14.2.el8_2.x86_64
        Architecture: x86-64

$ cat /etc/hosts
192.168.1.1   www.mydomain.example    mydomain.example

$ cat /etc/hostname
mydomain

Any opinion welcomed.

Thank you.

[KernelOops]

there is nothing wrong.

if you run: hostnamectl set-hostname mydomain.example, then thats exactly what you get...

essentially, your top level domain is "example" and your hostname is "mydomain".

did you expect something else?

[hack3rcon]

there is nothing wrong.

if you run: hostnamectl set-hostname mydomain.example, then thats exactly what you get...

essentially, your top level domain is "example" and your hostname is "mydomain".

did you expect something else?

For a website with the name "mydomain.net" what is the values of "hostname" and "hosts" must be?
"Hostname" must be "mydomain" or "mydomain.net" ?

[KernelOops]

usually, the server has its own subdomain, for example:

server.mydomain.net = the server itself identifying as "server"

then everything else would point to a service, for example:

mydomain.net = web (apache)
www.mydomain.net = alias of the above
ftp.mydomain.net = ftp (vsftpd)
irc.mydomain.net = irc (ircd)
pop.mydomain.net = pop3 (dovecot)
imap.mydomain.net = imap (dovecot)
...etc...

in practice, they are all just names, you can just use "mydomain.net" to listen for everything and not bother with subdomains.

For a website with the name "mydomain.net" what is the values of "hostname" and "hosts" must be?
"Hostname" must be "mydomain" or "mydomain.net" ?

[hack3rcon]

usually, the server has its own subdomain, for example:

server.mydomain.net = the server itself identifying as "server"

then everything else would point to a service, for example:

mydomain.net = web (apache)
www.mydomain.net = alias of the above
ftp.mydomain.net = ftp (vsftpd)
irc.mydomain.net = irc (ircd)
pop.mydomain.net = pop3 (dovecot)
imap.mydomain.net = imap (dovecot)
...etc...

in practice, they are all just names, you can just use "mydomain.net" to listen for everything and not bother with subdomains.

For a website with the name "mydomain.net" what is the values of "hostname" and "hosts" must be?
"Hostname" must be "mydomain" or "mydomain.net" ?

For a web site with the name "example-test.net" and "192.168.1.2" IP address Is below configuration OK?

Code: Select all

# cat /etc/hostname
#localhost.localdomain
example-test.net

And:

Code: Select all

# cat /etc/hosts
#127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
#::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.1.2   example-test.net   example-test

[KernelOops]

Ideally, you would use a subdomain for the server, like: server.example-test.net

[hack3rcon]

Ideally, you would use a subdomain for the server, like: server.example-test.net

Thank you.
Thus, my current setting is OK too.