Change amanda's reference
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),
If all these conditions are met ...
... then the domain line(s) may need adjusting.
Change the postfix configuration files
Update /etc/postfix/generic and /etc/postfix/main.cf by (replacing <hostname> and <domain>):
postconf -e myhostname=<hostname>
postconf -e mydestination=<hostname>,localhost.<domain>,localhost
postconf -e 'smtp_header_checks = regexp:/etc/postfix/header_checks'
Restart postfix:
/etc/init.d/postfix reload
In case there is undelivered mail from the old hostname, if not required it can be deleted using postsuper -d ALL
Reference: Debian WIKI page on changing hostname.
Change the hostname
service hostname restart
TBC
If the computer is backed up on bafi, either by push from the computer or pull from bafi:
Not tested (may all be done by the commands above): if running or using any of avahi, CUPS, ejabberd, Exim, /etc/motd, OpenSSH server, ssmtp or sysklogd then read the Debian WIKI page on changing hostname.
Change the LDAP client's uri
Change the LDAP Address Book clients
On DNS servers which have record(s) for the old name, change both the forward and reverse data files.
When the hostname of a system on the Blue Light LANs (192.168.10.0 and 192.168.28.0) is changed, the DNS service on backupserver will need re-configuring as documented in DNS server (bind) administration.
On computers with an /etc/hosts file which has record(s) for the old name, change the record(s).