Perl warning Setting locale failed unter Debian

Bei automatisierten Installationen von Debian oder Ubuntu kommt es vor dass die locales nicht vollständig gesetzt sind. Bei der Installation von Perl Anwendungen (z.B. Nagios) kommt es dann zur Warnmeldung perl: warning: Setting locale failed.

Warnmeldung

Die Warnmeldung bei der Installation von Perl Anwendungen sieht wie folgt aus:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Das Problem kann dabei auch auftreten, wenn Pakete nachinstalliert werden. Das folgende Beispiel zeigt einen entsprechenden Output:

8000050000:~# apt-get install multipath-tools
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following extra packages will be installed:
  dmsetup kpartx libaio1
Suggested packages:
  multipath-tools-boot
The following NEW packages will be installed:
  dmsetup kpartx libaio1 multipath-tools
0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
Need to get 266kB of archives.
After this operation, 950kB of additional disk space will be used.
Do you want to continue [Y/n]? y
Get:1 http://ftp.de.debian.org lenny/main dmsetup 2:1.02.27-4 [39.7kB]
Get:2 http://ftp.de.debian.org lenny/main kpartx 0.4.8-14+lenny2 [26.0kB]
Get:3 http://ftp.de.debian.org lenny/main libaio1 0.3.107-3 [7414B]
Get:4 http://ftp.de.debian.org lenny/main multipath-tools 0.4.8-14+lenny2 [193kB]
Fetched 266kB in 1s (154kB/s)           
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
Selecting previously deselected package dmsetup.
(Reading database ... 27499 files and directories currently installed.)
Unpacking dmsetup (from .../dmsetup_2%3a1.02.27-4_amd64.deb) ...
Selecting previously deselected package kpartx.
Unpacking kpartx (from .../kpartx_0.4.8-14+lenny2_amd64.deb) ...
Selecting previously deselected package libaio1.
Unpacking libaio1 (from .../libaio1_0.3.107-3_amd64.deb) ...
Selecting previously deselected package multipath-tools.
Unpacking multipath-tools (from .../multipath-tools_0.4.8-14+lenny2_amd64.deb) ...
Processing triggers for man-db ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
/usr/bin/mandb: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
manconv: can't set the locale; make sure $LC_* and $LANG are correct
Setting up dmsetup (2:1.02.27-4) ...
Setting up kpartx (0.4.8-14+lenny2) ...
Setting up libaio1 (0.3.107-3) ...
Setting up multipath-tools (0.4.8-14+lenny2) ...
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Starting multipath daemon: multipathd.
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
	LANGUAGE = (unset),
	LC_ALL = (unset),
	LANG = "en_US.utf8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
8000050000:~# 

Locale Einstellungen setzen

Die locale Einstellungen können wie folgt gesetzt werden (im Beispiel auf en_US.UTF-8):

export LANGUAGE=en_US.UTF-8
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8
locale-gen en_US.UTF-8
dpkg-reconfigure locales

Das Kommando dpkg-reconfigure locales öffnet unter Debian einen Dialog zur Auswahl der gewünschten Locales. Unter Ubuntu erscheint dieser Dialog nicht, Informationen zu Ubuntu finden zeigt der Artikel Locales unter Ubuntu konfigurieren.

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