Pecl / Python: unsupported language setting - Ubuntu 13.10

I want to install the pecl ssh2 extension. But when I try:

Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/command-not-found/+filebug
Please include the following information with the report:

command-not-found version: 0.3
Python version: 3.3.2 final 0
Distributor ID: Ubuntu
Description:    Ubuntu 13.10
Release:    13.10
Codename:   saucy
Exception information:

unsupported locale setting
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/CommandNotFound/util.py", line 24, in crash_guard
    callback()
  File "/usr/lib/command-not-found", line 69, in main
    enable_i18n()
  File "/usr/lib/command-not-found", line 40, in enable_i18n
    locale.setlocale(locale.LC_ALL, '')
  File "/usr/lib/python3.3/locale.py", line 541, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting

      

        
        
        
      

    

I tried everything, yes everything I found on google!

What I tried:

1- At the terminal

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

      

        
        
        
      

    

2- Editing the environment (/ etc / environment)

LC_ALL="en_US.UTF-8"
LANG="en_US.UTF-8"

      

        
        
        
      

    

3 Editing the locale (/ etc / default / locale)

LANG="en_US.UTF-8"

      

        
        
        
      

    

4- apt-get update and update

5- Reboot the system

locale command:

locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
LANG=
LANGUAGE=
LC_CTYPE=UTF-8
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=