hostname (none)

Hello,

Just upgraded from Ubuntu Server 9.04 to 10.04 and in the process my hostname was lost.

Code:

---

$ hostname
(none)
 
$ uname -n
(none)

---

Although configure file looks fine:

Code:

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$ cat /etc/hostname
bob_ubuntu
 
$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 bob_ubuntu.domain.com bob_ubuntu

The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

---

Have set hostname with:

Code:

---

$ sudo hostname bob_ubuntu
hostname: the specified hostname is invalid

---

But doing it this way you cant use '_' ..
Any suggestions?

Regards, cbob

I though you couldn't have an underscore in the hostname. Try changing the hostname to bob-ubuntu and run sudo /etc/init.d/hostname.sh start.

Then check hostname - you may need a reboot

Rgds
Chris

This does work, changing hostname to 'bob-ubuntu' but before my upgrade it was fine to have underscore.

I just want to reset it to the original.

/cbob

Seems strange that you where able to use an underscore all along. My understanding is that an underscore is an illegal character for a hostname. Is it working correctly now with the hyphen, or are you still having trouble?

I bit of info from an ibm manual

Quote:

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Avoid using the underscore (_) character in machine names. Internet standards dictate that domain names conform to the host name requirements described in Internet Official Protocol Standards RFC 952 and RFC 1123. Domain names must contain only letters (upper or lower case) and digits. Domain names can also contain dash characters ( - ) as long as the dashes are not on the ends of the name. Underscore characters ( _ ) are not supported in the host name

---

Rgds
Chris

Change to hyphen in all places where it was an underscore and it works grate! Thanks!

Regards, cbob