Fixing Perl Warning Setting Locale Failed Error Message on Ubuntu/Debian

If you run across Ubuntu/Debian perl or shell script and see the following locale error:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = "UTF-8",
LANG = "en_GB.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

Then it is more likely that your Ubuntu/Debian locale is not configured properly. I had found this error messages when I was trying to activate tightvncserver on my Raspberry Pi running a Debian Wheezy like below:

pi@raspi ~ $ tightvncserver
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_CTYPE = "UTF-8",
LANG = "en_GB.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

New 'X' desktop is raspi:1

Starting applications specified in /home/pi/.vnc/xstartup
Log file is /home/pi/.vnc/raspi:1.log

pi@raspi ~ $

To get rid of this error, I execute the following command as root and make sure that your current user are a sudoer or currently allowed to execute sudo command:

pi@raspi: ~ $ sudo -i
password:
root@raspi:~ # dpkg-reconfigure locales
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US.UTF-8",
LC_ALL = "en_US.UTF-8",
LC_CTYPE = "UTF-8",
LANG = "en_US.UTF-8"
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
/usr/bin/locale: Cannot set LC_CTYPE to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_MESSAGES to default locale: No such file or directory
/usr/bin/locale: Cannot set LC_ALL to default locale: No such file or directory

... at this point, select your desired locale settings,
... select only locale settings you need
... AND uncheck/untick the All locale,
... otherwise your system will generate all locale which takes a long time
... then select your desired default locale
... in my case, I only configure all en_US locale and set en_US as the default locale

Generating locales (this might take a while)...
en_US.ISO-8859-1... done
en_US.ISO-8859-15... done
en_US.UTF-8... done
Generation complete.
root@raspi:~ # exit
pi@raspi: ~ $

Try to execute the former shell command that show you the locale error. This time, you won’t see the locale error anymore. Great!

pi@raspi ~ $ vncserver -kill :1

Can't find file /home/pi/.vnc/raspi:1.pid
You'll have to kill the Xtightvnc process manually

pi@raspi ~ $ tightvncserver

New 'X' desktop is raspi:1

Starting applications specified in /home/pi/.vnc/xstartup
Log file is /home/pi/.vnc/raspi:1.log

pi@raspi ~ $ vncserver -kill :1
Killing Xtightvnc process ID 11604
pi@raspi ~ $

 

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