On the computer's host

LXC

TODO: what is the procedure for renaming an LXC? http://www.bonusbits.com/wiki/HowTo:Rename_LXC_Container

Xen

TODO: what is the procedure for renaming a Dom0 (nothing special?) and a DomU (at least the DomU's config file, log and autostart link on the Dom0 include the DomU's FQDN).

On the computer

All distributions

Cyrus

TBC

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TODO: develop procedure for renaming the volume group and document here (when / is on LVM as ours normally are, this may require rebuilding the initial RAM disk, re-configuring the boot manager, editing fstab ...).  Maybe useful links: https://we.riseup.net/debian/renaming-a-lvm-root-volume-group, https://bugzilla.redhat.com/show_bug.cgi?id=230190#c17 (RedHat),

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TODO: what is the procedure for renaming an LXC? http://www.bonusbits.com/wiki/HowTo:Rename_LXC_Container

Name resolution

/etc/hosts  If the name change includes a domain name change and the old domain name appears in /etc/hosts for the computer then it must be changed.

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TBC.  May involve re-generating certificates.

OpenVPN

Remove any OpenVPN client configuration for the old name: OpenVPN#Ontheclient

The next step is most commonly done on the client but may need to be done partly on the primary OpenVPN server, details in the linked section.

Set up the OpenVPN client under the new name: OpenVPN#Per-clientconfiguration%28serverandclient%29

Postfix

Do not restart or reload postfix until all files have been updated.

Update by editing:

• /etc/aliases  If it is changed, run the newalises command.
• /etc/mailname
• /etc/postfix/header_checks  If the file doesn't exist, create it using the procedure at http://wiki.bluelightav.org/x/PAIW . Do not restart or reload postfix until all files have been updated.   If it is changed, run the postmap command on it, in the /etc/postfix directory.
• /etc/postfix/generic  If it is changed, run the postmap command on it, in the /etc/postfix directory.

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In case there is undelivered mail from the old hostname, if not required it can be deleted using  postsuper -d ALL

Xen

TODO: what is the procedure for renaming a Dom0 (nothing special?) and a DomU (at least the DomU's config file, log and autostart link on the Dom0 include the DomU's FQDN).

Debian

Reference: Debian WIKI page on changing hostname.

Ubuntu

Change the hostname

• edit Edit /etc/hostname
• edit Edit /etc/hosts
• service hostname restart

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• dns2.bluelightav.org for public network addresses.
• openvpn.bluelightav.org for BL OpenVPN network addresses.
• bafi for Town Hall addresses.

LDAP server

TODO: when this section is understood, move it or not.  It is not clear whether it applies on the computer being renamed (in which case it should be above) or on another computer (in which case it is correctly here).

Change the LDAP client's uri

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