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Editor: ?JeromeAvond
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Deletions are marked like this. Additions are marked like this.
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=== Complexe or unusual ancient hostname === === Complexe or unusual old hostname (albator, qskdfjh, turlututu, ...) ===
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Take care you'd better do a grep before...

=== Well linux spread old hostname (linux, debian, lenny, etc...) ===

 #!/bin/bash

 usage() {
  echo "usage : $0 nouveau_nom_hote"
  exit 1
 }

 [ -z $1 ] && usage

 ancien=`hostname`
 nouveau=$1

 for file in \
    /etc/exim4/update-exim4.conf.conf \
    /etc/printcap \
    /etc/hostname \
    /etc/hosts \
    /etc/ssh/ssh_host_rsa_key.pub \
    /etc/ssh/ssh_host_dsa_key.pub \
    /etc/motd \
    /etc/ssmtp/ssmtp.conf
 do
   [ -f $file ] && sed s:$ancien:$nouveau:g $file > ${file}.tmp
   [ -f $file ] && mv ${file}.tmp $file
 done

Take care you'd better do a grep before...

This page explains how to change a system's hostname (i.e rename a computer/server)

Executive summary: hostname(1) isn't enough.

Rename a computer

Core networking

  • Update /etc/hostname

  • Update /etc/hosts, so local address(es) resolves with the new system name.

  • Reload the network configuration. You have two options

    • Reload configuration files
      <!> This will temporarily disconnect your system from the network (ssh usually resists short disconnection) 

      invoke-rc.d hostname.sh start
invoke-rc.d networking force-reload
invoke-rc.d network-manager force-reload

      ToDo: is it useful to reload network-manager?

    • or the lazy way: Restart the system.

Application specific

avahi

Avahi is used to publish (announce) local services. If you tweaked /etc/avahi/* you should run: 

  • invoke-rc.d avahi-daemon force-reload

ssmtp

Ssmtp is a light weight, send-only smtp server.

Adjust /etc/ssmtp/ssmtp.conf (hostname=, etc.). You don't need to restart the service.

Exim

Adjust /etc/exim4/update-exim4.conf.conf (hostname=). You need to restart the service.

Message Of The Day

Adjust /etc/motd. You don't need to restart a service.

Cups

Adjust /etc/printcap . You need to restart the service.

Mailname

Adjust /etc/mailname. You don't need to restart the service.

Openssh server

Adjust /etc/ssh/ssh_host_rsa_key.pub and /etc/ssh/ssh_host_dsa_key.pub (root@hostname at the end). You need to restart the service.

other

  • (to be written) there must be others...

    Charlie: It was me who took you. Not the Others...

Idea of script to help you on

Complexe or unusual old hostname (albator, qskdfjh, turlututu, ...)

  • #!/bin/bash usage() {
    • echo "usage : $0 nouveau_nom_hote" exit 1
    }

    [ -z $1 ] && usage

    ancien=hostname nouveau=$1

    grep $ancien /etc/ -rl 2>/dev/null | while read file do

    • sed s:$ancien:$nouveau:g $file > ${file}.tmp mv ${file}.tmp $file

    done

Take care you'd better do a grep before...

Well linux spread old hostname (linux, debian, lenny, etc...)

  • #!/bin/bash usage() {
    • echo "usage : $0 nouveau_nom_hote" exit 1
    }

    [ -z $1 ] && usage

    ancien=hostname nouveau=$1 for file in \

    • /etc/exim4/update-exim4.conf.conf \ /etc/printcap \ /etc/hostname \ /etc/hosts \ /etc/ssh/ssh_host_rsa_key.pub \ /etc/ssh/ssh_host_dsa_key.pub \ /etc/motd \ /etc/ssmtp/ssmtp.conf
    do

    • [ -f $file ] && sed s:$ancien:$nouveau:g $file > ${file}.tmp [ -f $file ] && mv ${file}.tmp $file

    done

Take care you'd better do a grep before...

See also