Masalah yang selalu munculnya teks seperti di bawah ini:

perl: warning: Setting locale failed.   
perl: warning: Please check that your locale settings:   
        LANGUAGE = "en_US:en",   
        LC_ALL = (unset),   
        LC_MESSAGES = "en_US.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   
(Reading database ... 21173 files and directories currently installed.)  
Removing bind9 ...  
 * Stopping domain name service... bind9                                        [ OK ]
Processing triggers for man-db ...   
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

Berikut salah satu cara untuk menanggulanginya, kalau tidak berhasil silahkan cari cari lainnya ya 🙂

1. Jalankan perintah locale untuk melihat locales apa yang sedang terpasang

   $ locale
   LANG=C
   LANGUAGE=
   LC_CTYPE=fi_FI.UTF-8
   LC_NUMERIC="C"
   LC_TIME="C"
   LC_COLLATE=fi_FI.UTF-8
   LC_MONETARY="C"
   LC_MESSAGES=fi_FI.UTF-8
   LC_PAPER="C"
   LC_NAME="C"
   LC_ADDRESS="C"
   LC_TELEPHONE="C"
   LC_MEASUREMENT="C"
   LC_IDENTIFICATION="C"
   LC_ALL=

2. Kemudian kita bangun locale yang belum terpasang dan direconfigure
   

   $ sudo locale-gen "en_US.UTF-8"
   Generating locales...
     en_US.UTF-8... done
   Generation complete.
   
   $ sudo dpkg-reconfigure locales
   Generating locales...
     en_US.UTF-8... up-to-date
   Generation complete.

Semoga berhasil ! 🙂