Attachment 254526 Details for Bug 440809

change-hostname script

change-hostname-22Nov08 (text/plain), 1.40 KB, created by Geoff Farrell on 2008-11-22 04:16:25 UTC

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Creator: Geoff Farrell

Created: 2008-11-22 04:16:25 UTC

Size: 1.40 KB

patch

obsolete

>#!/bin/bash
># change-hostname - script to change the hostname in all places it is used:
># 1. /proc/sys/kernel/hostname (by the 'hostname' command),
># 2. /etc/HOSTNAME, and
># 3. /etc/hosts.
>
># Usage: change-hostname SetHostname
># where 'SetHostname' is the desired hostname
># Put in /bin/change-hostname, alongside /bin/hostname
>
># Declarations:
>ETC_HOSTNAME="/etc/HOSTNAME"
>ETC_HOSTS="/etc/hosts"
>ETC_HOSTS_TMP="/tmp/etc-hosts"
>
>if [ -n "$1" ]; then						# If an argument specified
>SetHostname=$1							# Use it
>else								# Otherwise, print an error message and exit
>	echo "Error: missing hostname."
>	echo "Usage: change-hostname SetHostname"
>	echo "where 'SetHostname' is the desired hostname."
>	exit 1
>fi
>
>DotPosition=$(expr index "$SetHostname" ".")			# Look for a 'dot' separator
>if [ "$DotPosition" -gt 0 ]; then				# If found
>	AliasName="$(echo "$SetHostname" | cut -d "." -f1)"	# extract AliasName from before the 'dot'
>else								# 'dot' not found: not FQDN
>	AliasName="$SetHostname"				# Replicate SetHostname as AliasName
>fi								# Will result in: '127.0.0.2       MyHostname MyHostname' in /etc/hosts
>
># 1. Change /proc/sys/kernel/hostname:
>/bin/hostname "$AliasName"
>
># 2. Change hostname in /etc/HOSTNAME:
>echo "$SetHostname" > $ETC_HOSTNAME
>
># 3. Change hostname in /etc/hosts:
>cat $ETC_HOSTS | sed -e 's/$127.0.0.2       $.*$/\1'"$SetHostname"' '"$AliasName"'/' > $ETC_HOSTS_TMP
>mv $ETC_HOSTS_TMP $ETC_HOSTS

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Attachments on bug 440809: 249229 | 254526 | 256370